Notes of Metrology Branch
Pakistan Air Force announces vacancies related to Metrology branch which usually come once a year through short service commission. If you are interested to join PAF metrology branch then see all the questions given below.
MCQs of Metrology Branch in Forces
The purpose of instruments is to
(A) allow measurements to be made
(B) transmit the information
(C) change signals
(D) any of the above.
Answer
A
MCQ No – 2
The measurement refers to which of the following
(A) primary signal
(B) measured variable
(C) output
(D) all of the above.
Answer
C
MCQ No – 3
The measurement of a quantity
(A) is an act of comparison of an unknown quantity with another quantity
(B) is an act of comparison of an unknown quantity with a known quantity whose accuracy may be known or may not be known
(C) is an act of comparison of an unknown quantity with a predefined acceptable standard which is accurately known
(D) none of the above
Answer
C
MCQ No – 4
In present day measurement systems
(A) direct methods are commonly used
(B) one of direst methods is limited but indirect methods are commonly used
(C) both direct and indirect methods are commonly used
(D) all of the above
Answer
B
MCQ No – 5
The measurand is
(A) output
(B) measured variable
(C) secondary signal
(D) any of the above
Answer
B
MCQ No – 6
The temperature measurement by a thermocouple is
(A) primary measurement
(B) secondary measurement
(C) tertiary measurement
(D) any one of above
Answer
C
MCQ No – 7
The function of the signal manipulating element in a generalized measurement system is to
(A) change the quantity under measurement to an analog signal
(B) change the magnitude of the input signal while retaining its identity
(C) to perform non-linear operation like filtering, chopping and clipping and clamping
(D) non of thee abovee
Answer
B
MCQ No – 8
The intermediate stage of an instrument is used to
(A) sense the primary (input) signal
(B) indicate and record the measurement
(C) amplify and transmit the secondary signal
(D) any of thee above
Answer
C
MCQ No – 9
The degree of perfection used in instruments, the methods and the observations, is known as
(A) precision
(B) accuracy
(C) least count
(D) error
Answer
A
MCQ No – 10
The accuracy depends upon
(A) precision of instrument
(B) precision of method
(C) good planning
(D) all of the above
Answer
D
MCQ No – 11
The degree of closeness of the Measured value of a certain quantity with its true value is known as
(A) accuracy
(B) precision
(C) standard
(D) sensitivity
Answer
A
MCQ No – 12
Error of Measurement
(A) measured value – true value
(B) true value – measured value
(C) measured value – precision
(D) precision – true value
Answer
B
MCQ No – 13
The output stage of a generalized measurement system may comprise
(A) manipulator
(B) detector-transducer
(C) indicating or recording unit
(D) all of the above
Answer
C
MCQ No – 14
which of the following errors can arise, as a result of mistakes in reading, parallax, improper instrument location and inadequate highting?
(A) Construction error
(B) Transmission error
(C) Observation error
(D) Translation error
Answer
C
MCQ No – 15
Gearing, backlash, friction between moving parts, and scale accuracies are generally known as
(A) instrument error
(B) interference error
(C) calibration error
(D) interaction error
Answer
A
MCQ No – 16
Errors which may be variable both in magnitude and nature (positive or negative) are classified as
(A) hysteresis error
(B) random error
(C) systematic error
(D) interaction error
Answer
B
MCQ No – 17
The set of readings has a wide range and therefore it has
(A) low precision
(B) high precision
(C) low accuracy
(D) high accuracy
Answer
A
MCQ No – 18
The measurement of surface temperature in exposed situations where atmospheric variation can interfere with temperature measurement gives rise to
(A) transmission error
(B) interaction error
(C) operation error
(D) interference error
Answer
D
MCQ No – 19
Which of the following is not a line standard?
(A) Yard
(B) Meter
(C) Precision scale
(D) Length bar
Answer
D
MCQ No – 20
What is the length of the Imperial standard yard?
(A) 38 m
(B) 38 mm
(C) 38 inches
(D) 38 cm
Answer
C
MCQ No – 21
Which of the following is incorrect about the meter (line standard)?
(A) It is inoxidizable
(B) Kept at 10 ̊C
(C) Supported by two rollers
(D) Have a web type section
Answer
B
MCQ No – 22
By which material meter (line standard) bar is made of?
(A) Bronze
(B) Platinum
(C) Platinum-bronze alloy
(D) Platinum-iridium alloy
Answer
D
MCQ No – 23
Which of the following is not an end standard?
(A) Precision scale
(B) Length bars
(C) Slip gauges
(D) Gap gauges
Answer
A
MCQ No – 24
What is the diameter of end bars?
(A) 10 mm
(B) 20 mm
(C) 30 mm
(D) 40 mm
Answer
B
MCQ No – 25
What is the error in a reproduction of wavelength standards?
(A) 1 part in 100 million
(B) 2 parts in 50 million
(C) 2 parts in 50 million
(D) 1 part in 50 million
Answer
A
MCQ No – 26
Which color radiation of krypton 86 is selected for measurement?
(A) Yellow
(B) Green
(C) Orange
(D) Blue
Answer
C
MCQ No – 27
A vernier scale is good enough to read in _______ after decimal
(A) one digit
(B) two digits
(C) three digits
(D) four digits
Answer
B
MCQ No – 28
The Vernier Calliper’s advantage over the micrometer is that
(A) it can be used to make both inside and outside measurements over a range of sizes
(B) is more accurate
(C) is easier and quick to use
(D) None of these
Answer
A
MCQ No – 29
Which one of the following is NOT a part of a Vernier Caliper
(A) depth measuring blade
(B) beam
(C) ratchet
(D) locking screw
Answer
C
MCQ No – 30
what is the least count of vernier calip
(A) 0.01
(B) 0.02
(C) 0.1
(D) 0.2
Answer
B
MCQ No – 31
what is the least count of micrometer.
(A) 0.002
(B) 0.2
(C) 0.02
(D) 0.1
Answer
C
MCQ No – 32
The lost motion of the spindle in micrometer screw gauge when the rotation of the thimble is changed in direction is referred to as
(A) wear
(B) least count
(C) backlash
(D) total error
Answer
C
MCQ No – 33
What is the purpose of using a ratchet screw in the micrometer screw gauge?
(A) To maintain uniform measuring pressure
(B) To reduce wear of screw threads
(C) Both the above
(D) None of the above
Answer
A
MCQ No – 34
If the spindle of the micrometer does not move by rotating the thimble then the instrument is said to have _____
(A) zero error
(B) positive error
(C) backlash error
(D) negative error
Answer
C
MCQ No – 35
Depth micrometer is a special micrometer used to measure
(A) the depth of holes
(B) the depth of grooves and recesses
(C) the height of shoulders or projections
(D) all of these
Answer
D
MCQ No – 36
In an outside micrometer _______ turns open the anvils by exactly 1.00 mm
(A) half
(B) one
(C) two
(D) one and half
Answer
C
MCQ No – 37
Circular scale on micrometer is marked on
(A) anvil
(B) barrel
(C) thimble
(D) ratchet
Answer
C
MCQ No – 38
While taking a measurement with the help of a Micrometer, which two parts of a Micrometer are used to hold the specimen?
(A) Spindle and Anvil
(B) Spindle and Ratchet
(C) Anvil and Ratchet
(D) Anvil and Barrel
Answer
A
MCQ No – 39
Which of the following is incorrect about micrometers?
(A) Thimble and barrel should have a dull finish
(B) Total travel of the measuring spindle is called measuring range
(C) The graduated surface diameter of the barrel should be 5 mm
(D) A screw has 10 or 20 threads per cm
Answer
C
MCQ No – 40
How many divisions are graduated on thimble?
(A) 20
(B) 25
(C) 45
(D) 50
Answer
D
MCQ No – 41
What is the range of reading error for measuring a range of height gauges of 250 mm?
(A) ±0.02
(B) ±0.03
(C) ±0.04
(D) ±0.05
Answer
A
MCQ No – 42
What is the standard reference temperature for the measurement of the accuracy of vernier height gauges?
(A) 20 K
(B) 20 ̊C
(C) 40 K
(D) 40 ̊C
Answer
B
MCQ No – 43
The accuracy of micrometers, calipers, dial indicators can be checked by a
(A) feeler gauge
(B) slip gauge
(C) ring gauge
(D) plug gauge
Answer
B
MCQ No – 44
The two slip gauges in precision measurement are joined by _______
(A) sliding
(B) adhesion
(C) wringing
(D) slipping
Answer
C
MCQ No – 45
For inspection purpose __________ slip gauges are used
(A) 1 grade
(B) 00 grade
(C) 2 grade
(D) 0 grade
Answer
B
MCQ No – 46
What is the approximate size of slip gauges?
(A) 30mm long and 10mm wide
(B) 45mm long and 15mm wide
(C) 20mm long and 5mm wide
(D) 25mm long and 10mm wide
Answer
A
MCQ No – 47
The thickness of oil film at the surface of slip gauges is of the order of
(A) 0.005 micron
(B) 0.1 micron
(C) 1 micron
(D) 10 micron
Answer
A
MCQ No – 48
_________ is used for the accurate setting of tail stock
(A) Thread gauge
(B) Slip gauge
(C) Vernier caliper
(D) Plug gauge
Answer
B
MCQ No – 49
A high grade set of slip gauge preserved in a factory and not put into general use would be a standard of the type _________
(A) international
(B) secondary
(C) working
(D) primary
Answer
C
MCQ No – 50
Slip gauges were invented by _________
(A) C E Johansson
(B) Alexander
(C) C V Raman
(D) Symons
Answer
A
MCQ No – 51
Which of the following considered as a slip gauges grades
(A) reference grade
(B) calibration grade
(C) 0, I, II grades
(D) all of the above
Answer
D
MCQ No – 52
Process of wringing in slip gauge is due to
(A) molecular cohesion
(B) molecular adhesion
(C) air friction
(D) air vacuum
Answer
B
MCQ No – 53
How many grades or classes of slip gauges are present?
(A) 3
(B) 5
(C) 6
(D) 4
Answer
B
MCQ No – 54
Why ceramic slip gauges are better than steel slip gauges?
(A) Due to its wringing capability
(B) Due to its resistance to impact
(C) Due to its resistance to wear
(D) Due to its thermal Expansion
Answer
C
MCQ No – 55
Which one of the following is not a recommended set gauge of a metric unit?
(A) M112
(B) M105
(C) M95
(D) M33
Answer
C
MCQ No – 56
Which of the following is not a slip gauge accessory?
(A) Measuring jaws
(B) Holder
(C) Rod clamp
(D) Base
Answer
C
MCQ No – 57
Which of the following is not an angle measuring device?
(A) Feeler gauge
(B) Sine bar
(C) Bevel protector
(D) Combination set
Answer
A
MCQ No – 58
What is the range of bevel protractor?
(A) 0-90°
(B) 0-180°
(C) 0-360°
(D) 90-270°
Answer
C
MCQ No – 59
Where will be the vernier scale is present in bevel protector?
(A) Base plate
(B) Circular plate
(C) Adjustable plate
(D) Main body
Answer
B
MCQ No – 60
What is the least count of vernier bevel protractor?
(A) 10’
(B) 5’’
(C) 5’
(D) 10’’
Answer
C
MCQ No – 61
Which of the following is a general dimension of the blade(length*width)?
(A) 250mm*3mm
(B) 100mm*2mm
(C) 150mm*3mm
(D) 150mm*2mm
Answer
C
MCQ No – 62
Accuracy of setting a sine bar
(A) is poor for smaller angles
(B) is maximum when angle of measurement is
(C) decreases appreciably with steep angle
(D) is dependent on accuracy of outer dimensions of sine bar
Answer
C
MCQ No – 63
External taper can be accurately measured with the help of
(A) sine bar and slip gauges
(B) dividing head
(C) height gauge
(D) clinometer
Answer
A
MCQ No – 64
The working principle of sine bar is
(A) trigonometry
(B) optimetry
(C) interferometry
(D) algebric
Answer
A
MCQ No – 65
Which one of the following is an angle measuring device?
(A) Trammel
(B) Hermaphrodite caliper
(C) Divider
(D) Sine bar
Answer
D
MCQ No – 66
Up to which angle sine bars can measure the angles
(A) 45
(B) 60
(C) 90
(D) 120
Answer
A
MCQ No – 67
Which of the following is not the essential requirement for accuracy of measurement with a sine bar?
(A) Flatness of upper surface
(B) Exact distance between roller axes and mutual parallelism
(C) Parallelism between top and bottom surfaces
(D) Parallelism of rollers to upper surface and equality of axis distance as from surface
Answer
C
MCQ No – 68
Sine bar specification can be expressed in _________
(A) center distance between the two rollers and size of rollers
(B) its total length
(C) weight of sine bar
(D) length and width of rollers
Answer
A
MCQ No – 69
What is the permissible tolerance on the flatness of side faces of sine bars of 100 mm as per IS 5359-1969?
(A) 0.001 mm
(B) 0.005 mm
(C) 0.01 mm
(D) 0.05 mm
Answer
B
MCQ No – 70
Which of the following is not used in the making of sine bars?
(A) High carbon
(B) High chromium
(C) Corrosion-resistant steel
(D) Aluminum
Answer
D
MCQ No – 71
What is the sine center?
(A) Center of the sine bar
(B) Sine bar with block holding centers
(C) Sine bar with a hole in center
(D) Sine bar with hollow rod in center
Answer
B
MCQ No – 72
Up to which inclination sine centers can be used?
(A) 45 degree
(B) 90 degree
(C) 120 degree
(D) 60 degree
Answer
D
MCQ No – 73
What are dial gauges or dial test indicators used for ?
(A) Measuring known angles or locating any work to a given angle
(B) Checking flatness of surfaces and parallelism of the bars and rods
(C) Checking the linear displacement of the tool
(D) Checking the thickness of the chip
Answer
B
MCQ No – 74
Accurate centering of work mounted in an independent chuck can be determined by using
(A) center gauge
(B) height gauge
(C) dial indicator
(D) surface gauge
Answer
C
MCQ No – 75
What is the use of Spirit Levels?
(A) Angular measurements only
(B) Static leveling only
(C) Static leveling of equipment and angular measurement
(D) Finding roundness of rotating parts
Answer
C
MCQ No – 76
What is the approximate size of angle gauges?
(A) 76mm long and 16 wide
(B) 85mm long and 26 wide
(C) 16mm long and 75 wide
(D) 70mm long and 18 wide
Answer
A
MCQ No – 77
What are the two grades of angle gauges?
(A) Master and tool room
(B) Precise and Normal
(C) Standard and Industrial
(D) High and low
Answer
A
MCQ No – 78
How angle greater than 90° is measured?
(A) By repeating gauges
(B) Using square plate
(C) Using sine bar
(D) Using autocollimator
Answer
B
MCQ No – 79
A collimator is simply a
(A) source of a bundle of parallel light rays
(B) source of point light
(C) source of alignment telescope
(D) device used in interferometric measurements
Answer
A
MCQ No – 80
Auto collimator is used for
(A) straightness measurement
(B) parallelism measurement
(C) flatness measurement
(D) angular measurement
Answer
D
MCQ No – 81
Angle Dekkor is another type of
(A) auto-collimator
(B) optical square
(C) clinometer
(D) angle gauge
Answer
A
This set of Engineering Metrology Multiple Choice Questions & Answers focuses on “Calibration of Linear and Angular Measuring Instruments”.
What is the relation between variation due to observation, manufacturing process and measuring process of a product?
a) σobservation= σprocess+ σmeasurement
b) σobservation = σprocess – σmeasurement
c) σobservation = σprocess * σmeasurement
d) σobservation = σprocess / σmeasurement
View Answer
Answer: a
Explanation: The variation in the observation depends upon the variation in the product due to manufacturing process and variation due to measuring process. In order to keep σobservation minimum measurement should be kept minimum so that product as a whole is reliable.
What is the maximum permissible error for class I micrometers?
a) 0.002 mm
b) 0.004 mm
c) 0.008 mm
d) 0.016 mm
View Answer
Answer: b
Explanation: In micrometers, to cover the entire range the error in readings is checked by slip gauges. The maximum permissible error for class I micrometers is 0.004 mm and 0.008 mm for class II micrometers.
What is the permissible error in the perpendicular motion of ocular microscope column w.r.t. The work stage over 100 mm movements?
a) 0.04 mm
b) 0.05 mm
c) 0.07 mm
d) 0.06 mm
View Answer
Answer: d
Explanation:The permissible error in the perpendicular motion of ocular microscope column w.r.t. The work stage over 100 mm movements is 0.06mm.
Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer?
a) Dial indicator
b) Slip gauges
c) Control shaft
d) Universal microscope
View Answer
Answer: c
Explanation: A special control shaft is used to check this where a right angled blade is provided at right angle to shaft diameter line. The ocular line is made to coincide with the blade and the column is titled, the shift in position of the ocular line is noted, this shift is the required error.
What is the least count of clinometer which is used to check reading of column rotation used for setting of helix angles in universal micrometer?
a) 1’
b) 2’
c) 3’
d) 4’
View Answer
Answer: a
Explanation: The permissible error which is allowed in the entire range of column rotation is ± 5′. A clinometer is used to check this which is of 1′ least count. The clinometer is put over column top. Given Inclination is further checked with clinometer.
Which of the following is true for the calibration of instruments?
a) In casting and fabrication shops the measurements made are of more precise nature as compared to those made in machine shop and tool room
b) Periodical calibration is made for optical measuring instruments
c) There is no need of periodic calibration in universal microscope
d) Preventive maintenance is not necessary for optical measuring instruments
View Answer
Answer: b
Explanation: In machine shop and tool room the measurements made are of more precise than those made in casting and fabrication shops, so instruments used in these shops require more frequent calibration. Annual programme can be made for periodical calibration and for general preventive maintenance in optical measuring instruments like universal microscope.
What is the permissible error in straight movement of longitudinal and transverse table in horizontal plane?
a) 0.002 mm
b) 0.003 mm
c) 0.004 mm
d) 0.005 mm
View Answer
Answer: a
Explanation: The permissible error in straight movement of longitudinal and transverse table is 0.002 mm in horizontal plane and 0.005 mm in vertical plane. This can be checked by using a rectangular straight edge and a dial indicator of least count 0.001 mm with an attachment for fixing dial indicator.
Which of the following is true for checking the Relative perpendicular motion of the longitudinal and transverse carriage?
a) The permissible error allowed is 0.005 mm in 2500 mm length.
b) This is checked using a slip gauges
c) Precision square of class I or 0 is used
d) Maximum error in precision error is of ± 10″ in squareness
View Answer
Answer: c
Explanation: The permissible error allowed in this case is 0.005 mm in 1100 mm length. This can be done by using a precision square of class I or class 0 accuracy having a maximum error of ± 10″ in squareness.
What is the maximum permissible error in wear of centres?
a) 0.04 mm
b) 0.03 mm
c) 0.02 mm
d) 0.01 mm
View Answer
Answer: d
Explanation: The centres are set and checked for straightness. It can be observed while rotating the centres. The maximum error permissible for wear of centres is 0.01 mm.
What is the least count of dial indicators which can be calibrated using passmeter?
a) 0.01 mm
b) 0.03 mm
c) 0.05 mm
d) 0.07 mm
View Answer
Answer: a
Explanation: The dial indicators of least count 0.01 mm can be calibrated by using passmeter or by micrometer dial comparator of least count 0.002 mm. The dial indicators can also be calibrated using slip gauges.
1-The degree of closeness of the measured value of a certain quantity with its true value is known as
Accuracy
Precision
Standard
Sensitivity
(Ans: a)
2-Error of measurement =
True value – Measured value
Precision – True value
Measured value – Precision
None of the above
(Ans: a)
3-The ability by which a measuring device can detect small differences in the quantity being measured by it, is called its
Damping
Sensitivity
Accuracy
None of the above
(Ans: b)
4-The following term(s) is (are) associated with measuring devices
Sensitivity
Damping
Both ‘a’ and ‘b’
None of the above
(Ans: c)
5-To compare an unknown with a standard through a calibrated system is called
Direct comparison
Indirect comparison
both ‘a’ and ‘b’
None of the above
(Ans: b)
6-The following is an internationally recognized and accepted unit system
MKS
FPS
SI
All of the above
(Ans: c)
7-One yard = _____ inch
36
38
40
42
(Ans: a)
8-The following is a line standard of measurement
Measuring tape
Slip gauge
Micrometer
End bars
(Ans: a)
9-The ‘Wringing’ is due to
Atmospheric pressure
Molecular attraction
both ‘a’ and ‘b’
None of the above
(Ans: c)
10-The angle gauge by Dr. Tamlison consists of a set of
10 gauges
12 gauges
14 gauges
16 gauges
(Ans: a)
11-1 Angstrom (Å) = _____
10^-6m
10^-8m
10^-10m
10^-12m
(Ans: c)
12-The principle of ‘Interchangeability’ is normally employed for
Mass production
Production of identical parts
Parts within the prescribed limits of sizes
All of the above
(Ans: d)
13-Following is the theoretical size which is common to both the parts of a mating pair
Normal size
Actual size
Base size
All of the above
(Ans: c)
14-_____ is equal to the differences of the two limits of size of the part
Tolerance
Low limit
High limit
Design size
(Ans: a)
15-The amount by which the actual size of a shaft is less than the actual size of mating hole in an assembly
Clearance
Interference
Allowance
None of the above
(Ans: a)
16-The amount by which the actual size of a shaft is less than the actual size of mating hole in an assembly
Clearance
Interference
Allowance
None of the above
(Ans: b)
17-A positive allowance will always result in a _____ fit.
Clearance
Interference
both ‘a’ and ‘b’
Any of the above
(Ans: a)
18-A negative allowance will always result in a _____ fit.
Clearance
Interference
Transition
Any of the above
(Ans: b)
19-A shaft rotating in a bushed bearing is good example of
Sliding fit
Running fit
Push fit
Driving fit
(Ans: b)
20-Fitting of rim on a locomotive wheel is done by
Keying fit
Driving fit
Force fir
Any of the above
(Ans: c)
21-The following is used to check the diameters of holes
Plug gauge
Ring gauge
Slip gauge
Standard screw pitch gauge
(Ans: a)
22-To check external diameter of hole, we use
Plug gauge
Ring gauge
Slip gauge
Standard screw pitch gauge
(Ans: b)
23-‘GO’ and ‘NO GO’ gauge is a type of
plug gauge
slip gauge
ring gauge
limit gauge
(Ans: d)
24-The following is not a type of comparator
Electrical
Pneumatic
Optical
Hydraulic
(Ans: d)
25-‘Electrolimit’ gauge block comparator and ‘Talyman’ Electrical comparator work on the principle of
Kirchoff’s law
Wheatstone bridge
Faraday,s law
Lenz,s law
(Ans: b)
26-The following is not used to measure angles
Bevel protectors
Calibrated levels
Clinometers
Optical flats
(Ans: d)
27-In v-shape method, the minor diameter of thread is given by
D ± (d2 – d1)
D ± (d1 – d2)
D ± (d2 + d1)
None of the above
Where, D = Diameter of cylindrical gauge, d1 = micrometer reading of cylindrical gauge, d2 = micrometer reading of threads, d = minor diameter
(Ans: a)
28-The following is not a method to find effective thread diameter
Thread micrometer
Two wire method
Three wire method
The v-piece method
(Ans: d)
29-The effective diameter (E) in three wire method is given by
E = M – C
E = M + C
E = M / C
E = M x C
(Ans: a)
30-The following method(s) is (are) used to measure the minor diameter of internal threads
Taper parallels methods
Calibrated rollers methods
both ‘a’ and ‘b’
None of the above
(Ans: c)
1) What is meant by hitch hiking? a. procedure of secret voting to select the most appropriate idea b. enlisting ideas in specific format considering similarities c. ideas suggested based on other ideas d. none of the above
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2) What does N, P and L mean in N.P.L. Gauge interferometer? a. Nikon pulsed laser b. Nuclear plasma laboratory c. National Physics Laboratory d. Nuclear physics laboratory
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3) Calculate the taper angle, if 8 mm and 12 mm are the diameters of A and B balls respectively. Ball A is at a height of 25 mm from the horizontal ground surface and B at 15 mm. a. 14.47˚ b. 28.9˚ c. 7.23˚ d. None of the above
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4) The aim of Just-In-Time manufacturing principle is to eliminate a. time wastage b. labour wastage c. cost of excessive inventory d. all of the above
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5) Which quality management program is related to the maintenance of plants and equipments? a. Environmental management systems b. Fault tree analysis c. Failure mode effect analysis d. Total productive maintenance
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6) What is acceptance quality level? a. Maximum percentage of defective parts for sampling purpose are considered satisfactory as a process average b. Minimum percentage of defective parts for sampling purpose are considered satisfactory as a process average
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7) Which of the following statements is/are true for sampling inspection? a. Acceptance sampling does not involve any risk b. Characteristics of the entire lot can be truly specified c. Less fatigue results in less mistakes d. All the above statements are true
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8) What is the graph (frequency vs cell) shown below called as? a. Bar diagram b. Frequency histogram c. Frequency bar chart d. None of the above
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9) What is capability ratio? a. The ratio of process capability and number of units inspected b. The ratio of specification range and process capability c. The ratio of number of defectives and process capability d. The ratio of number of defectives and number of units inspected
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10) What is meant by P, D, S and A in PDSA cycle? a. Progress Development Study Act b. Plan Do Study Act c. Project Development Study Act d. Prevention Do Study Act
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11) Which of the following statements is/are true according to Deming’s Deadly Diseases? a. short term profits are very useful for long term goals b. mobility of management leads to stability c. merit rating leads to devastating d. all of the above
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12) Which among the following is used to measure velocity of an object? a. Laser Doppler effect b. Laser interferometers c. Laser telemetric system d. None of the above
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13) Which dimensions can be measured using image shearing microscope? a. linear dimensions b. angular dimensions c. both linear and angular dimensions d. none of the above
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14) Which of the following components are inspected by a Tool maker’s microscope? a. gauges b. screw threads c. dies and fixtures d. all of the above
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15) Which of the following instruments is used to measure base pitch of a gear in base tangent method? a. Gear tooth vernier caliper b. David Brown tangent caliper c. David Brown tangent comparator d. David Brown tangent micrometer
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16) Which method gives accurate results when effective diameter is measured without considering the thread angle? a. Two wire method b. Three wire method c. Best wire size d. All the above
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17) Which type of threads are used to transmit power in one direction? a. Square threads b. Buttress threads c. Both a. and b. d. None of the above
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18) Calculate CLA value of roughness for a graph, having 100 horizontal magnification and 10000 vertical magnification for a sampling length of 1.2 mm. The areas above the datum line are 100 mm2, 120 mm2, 140 mm2, 40 mm2 and below the datum line are 80 mm2, 40 mm2, 150 mm2, 90 mm2. a. 0.6333 micron b. 6.333 micron c. 0.912 micron d. 0.079 micron
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19) Which method is calculated considering geometric average of ordinates? a. Centre line average method b. Peak to valley height method c. Root mean square method d. All of the above
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20) The Pitter – N.P.L. Gauge interferometer is used to measure a. flatness b. length c. straightness d. all of the above
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21) What does the following interference band pattern indicate? a. Gauge has taper along its large edge b. Gauge has taper along its short corner c. Flat gauge d. Bands have same direction but the pitch is different
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22) Newall system is a type of a. bilateral hole based system b. limit system c. both a. and b. d. none of the above
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23) In hole basis system, basic size is equal to a. maximum hole size b. minimum hole size c. upper deviation which is zero d. none of the above
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24) Which of the following is tested for parallelism between trajectory and a plane? a. plane is on a component which moves b. plane is on a component which does not moves c. both a. and b. d. none of the above
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25) What is error of circularity? a. Distance between maximum inscribing circle and minimum circumscribing circle measured radially b. Distance between maximum inscribing circle and minimum zone circle measured radially c. Distance between least square circle and minimum zone circle measured radially d. None of the above
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26) What is the phase difference, when the system is operated at excitation frequency ? a. Phase difference is greater than 90˚ b. Phase difference is less than 90˚ c. Phase difference is zero d. Unpredictable
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27) Which of the following statements is true for LVDT? a. It is a mutual capacitive transducer b. Presence of hysteresis gives high repeatability c. It can measure displacement and pressure d. All of the above
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28) Which of the following materials is/are used to make an angle gauge block? a. Hardening tool steel b. Nickel c. Tungsten carbide d. All of the above
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29) Which type of tolerance does a slip gauge have? a. Unilateral tolerance b. Bilateral tolerance c. Both a. and b. d. None of the above
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30) Which of the following statements is/are true? 1. Gross errors are known as compensating errors a. Only 1 b. Only 2 c. Only 3 d. All of the above
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31) Which of the following errors are also known as cumulative errors? a. Random errors b. Systematic errors c. Gross errors d. System interaction errors
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32) Which of the following statements is/are false? 1. Fault tree analysis method is used to determine reliability of product a. Only statement 3 b. Statement 2 and statement 3 c. Statement 1, 3 and 4 d. Only statement 2
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33) What is quality assurance? a. Quality assurance deals with activities which prove that products and services meet the required quality standard b. Quality assurance deals with activities which aim at customers satisfaction c. Quality assurance deals with controlling the quality of products by inspection d. All of the above
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34) Which sampling method is used when simple random sampling method becomes inconvenient to use in large lots? a. systematic sampling b. stratified sampling c. cluster sampling d. sampling in stages
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35) Maximum data handling analysis load is observed in a. single sampling plan b. double sampling plan c. sequential sampling plan d. all of the above
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36) Which of the following statements is/are true? 1. Trend type of control chart pattern shows continuous movement of points upwards and downwards a. Only 1 b. Only 2 c. Only 3 d. All of the above
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37) Which control chart pattern is/are used for assignable causes? a. Trend pattern b. Shift pattern c. Extreme variation pattern d. All of the above
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38) Waterfall method is observed in a. product design and development b. quality circle c. brain storming d. flow chart
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39) Which of the following is the limitation of Quality circle? a. higher cost b. training time and cost c. development of leadership d. all of the above
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40) Inadvertent errors are caused due to a. improper timely feedback b. less knowledge about the product c. less information d. all of the above
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41) Quality improvement planning is related to which category of cost? a. Cost of failure b. Cost of appraisal c. Cost of prevention d. All of the above
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42) In image shearing techniques, what is meant by single shear? a. In single shear technique, two images have edge to edge contact and later on one image is shifted some distance over the other b. In single shear technique, one image is shifted some distance till an edge to edge contact is established
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43) What is the function of frame grabber? a. It stores the obtained data b. It converts digital words to analog voltage levels c. It converts analog voltage levels to digital words d. All of the above
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44) Analytical checking of gears includes checking of a. tooth profile b. vibrations c. noise level d. all of the above
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45) Which formula is used to calculate diametral pitch? a. (number of teeth) x (pitch circle diameter) b. (pitch circle diameter) / (number of teeth) c. (number of teeth) / (pitch circle diameter) d. none of the above
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46) According to Taylor’s principle which type of gauge checks both size and geometric features? a. Go gauge b. No go gauge c. Both a. and b. d. None of the above
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47) What effect does pitch error have on nut and bolt? a. Major diameter of nut decreases and effective diameter of bolt increases b. Effective diameter of nut decreases and effective diameter of bolt increases c. Effective diameter of nut increases and effective diameter of bolt decreases d. None of the above
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48) What is ten point height method? a. It is the average sum of ten highest points measured within sampling length b. It is the average difference of five highest points and five deepest valleys measured within sampling length c. It is the sum of ten highest points divided by sum of ten deepest valleys measured within sampling length d. It is the average sum of five highest points and five deepest valleys measured within sampling length
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49) Which of the following statements is true? a. Photocell is used to measure light intensity b. Planimeter is used to measure surface roughness c. According to Indian Standard 696 roughness valve is to be measured in millimeter d. All statements are true
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50) Which type of surface in a fringe pattern exhibits the movement of fringes towards the centre? a. concave surface b. convex surface
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51) At which angle does a glass plate reflector set in N.P.L. interferometer? a. 30˚ b. 45˚ c. 60˚ d. 90˚
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52) Which type of deviation is observed while calculating hole dimensions? a. Positive b. Negative c. Zero d. All of the above
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53) The snap gauge having go dimension corresponds to a. maximum metal condition b. minimum metal condition c. minimum material condition d. none of the above
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54) What is/are the factor(s) causing runout? a. Error of position b. Error of bearings c. Both a and b d. None of the above
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55) In the diagram shown below, what is the distance between A and B called as ? a. Radial throw b. Runout c. Radial runout d. None of the above
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56) Internal diameter of any workpiece can be measured using a. Solex pneumatic comparator b. Sigma comparator c. Johansson mickrocator d. All of the above
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57) Calculate the range of linear scale for pressure ratios between 0.6 to 0.8. The air is supplied at 5 bar to the control jet, which has a diameter of 0.45 mm and the diameter of measuring jet is 0.83 mm. a. 0.244 mm b. 0.0976 mm c. 0.0244 mm d. None of the above
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58) Which of the following is true? a. Ring gauge has a taper angle of 3 Φ b. Clinometer cannot measure angle between two adjacent surfaces c. Clinometer uses micrometer to measure small angles d. All of the above
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59) Which among the following is measured using four ball method? a. Diameter b. Length c. Angle d. All of the above
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60) Match the following Group 1 items (Type of error) with Group 2 items (characteristics) and select the correct option 1. Gross error ——————————————— A. Magnitude and direction vary a. 1-B, 2-A, 3-D, 4-C b. 1-A, 2-C, 3-D, 4-B c. 1-C, 2-D, 3-A, 4-B d. 1-D, 2-A, 3-B, 4-C
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61) Which of the following is a characteristic of End standard? a. accuracy of ± 0.2 mm b. accuracy of ± 0.050 mm c. accuracy of ± 0.001 mm d. accuracy of ± 1.00 mm
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62) Which ISO standard is used in international automobile companies to set automotive quality system standards ? a. ISO 14000 b. TS 16949 c. ISO 9000 d. none of the above
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63) ISO 14000 quality standard is related with a. Environmental management systems b. Automotive quality standards c. Eliminating poor quality d. Customer satisfaction
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64) On operating characteristics curve, consumers risk is denoted by a. α b. β c. γ d. None of the above
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65) Which of the following statements is/are true? 1. Probability of acceptance decreases if acceptance number increases, when sampling size is kept constant a. Only 1 b. Only 2 c. Only 3 d. All the above statements are true
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66) Sample size of 1 m2 is observed in which type of chart? a. C chart b. P chart c. nP chart d. R chart
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67) Which of the following statements is true? 1. P and nP charts cannot use limit gauges a. Only 1 b. Only 2 c. Only 3 d. All the statements are true
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68) Which type of chart uses the rule of 20:80? a. cause and effect chart b. Pareto chart c. fish bone diagram d. control chart
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69) Which among the following depicts positive and negative relation between driving factor and performance factor? a. Scatter diagram b. histogram c. check sheet d. none of the above
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70) Which of the following strategies of Deming’s fourteen points is included into category of Management commitment? a. Institute leadership b. Encouraging education c. Eliminating exhortations d. Adopting new philosophy
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71) Which formula is used to calculate quality of performance? a. Quality of performance = quality of design + quality of conformance b. Quality of performance = quality of design – quality of conformance c. Quality of performance = quality of design + availability d. None of the above
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72) Which are the different techniques used by interpretation segments for interpretation? a. frame grabber and frame store b. template matching and weighting c. thresholding and edge detection d. all of the above
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73) Which of the following is a contact type of automated inspection method? a. Inspection probe b. Laser scanning c. Electric field d. All of the above
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74) A gear has 30 teeth with module 4 mm and pressure angle of 20o. Calculate length of base tangent in a gear over 7 teeth space. a. 21.25 mm b. 90.23 mm c. 62.53 mm d. None of the above
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75) Calculate the tool width of a gear having 30 number of teeth and with module 5 mm. a. 6.352 mm b. 5.555 mm c. 7.850 mm d. none of the above
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76) Which of the following statements is true? a. In three wire method, each flank of a thread is touched by a wire in axial plane section and this is valid only for a thread having rank angle b. Compression error is always subtracted from effective diameter value obtained c. Floating carriage type of micrometer is used for two wire method —- d. The value of θ is assumed 30o while calculating best wire diameter for Withworth thread
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77) Calculate diameter of best wire for a Withworth thread of M 24 x 7 mm size. a. 4.04 mm b. 7.8 mm c. 3.94 mm d. 8.08 mm
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78) Which of the following methods is unreliable to evaluate the surface finish? a. Electrical stylus profilometer b. Wallace surface dynamometer c. Profilograph d. Tomlinson surface tester
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79) Which principle does Taylor-Hobson-Talysurf tester work on? a. Capacitive demodulating principle b. Intensity modulating principle c. Inductive modulating principle d. Carrier modulating principle
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80) Which type of light source is used in N.P.L. type of flatness interferometer? a. Mercury vapour lamp b. Cadmium lamp c. Both a. and b. d. None of the above
| ||
81) Which among the following is used to create fringes in N.P.L. interferometer? a. Condensing lens b. Collimating lens c. Optical flat d. All of the above
| ||
82) How is interference between shaft and hole calculated? a. Interference = maximum shaft – minimum hole b. Interference = minimum shaft – maximum hole c. Interference = minimum shaft + maximum hole d. None of the above
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83) Which of the following is true for interference fit? a. Shaft is always smaller than the hole b. Shaft is always bigger than the hole c. Interference fits have shaft and hole of same dimension d. None of the above
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84) Which type of circularity reference circle is shown below ? a. Minimum inscribed circle b. Minimum circumscribed circle c. Least square circle d. Minimum zone circle
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85) Which error is observed due to lack of squareness when depth is measured using depth micrometer? a. parallax error b. cosine error c. sine error d. all of the above
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86) The sensitivity of back pressure air gauge is given by the relation shown below, what does δ R / δ p2 signify? (δR / δt) = (δ Am / δ t) x (δ R / δ p2 ) x (δ p2 / δ Am ) a. Pneumatic sensitivity b. Sensitivity of pressure gauge c. Overall magnification d. Measuring head sensitivity
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87) Which principle is used to measure distance in electronic comparator? a. Frequency modulation b. Radio oscillations c. Both a. and b. d. None of the above
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88) Testing flatness or straightness of a surface is possible using a. vernier caliper b. micrometer c. autocollimator d. all of the above
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89) Grade 1 is used in a. high precision tasks b. department of inspection c. calibration of instruments d. all of the above
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90) In which of the following length standards, parallax error is observed? a. line standard b. end standard c. both a. and b. d. none of the above
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91) Imperial standard yard is made of a. platinum alloy b. platinum iridium alloy c. bronze d. all of the above
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92) Which among the following is a pull type signaling system? a. Just in time b. Kanban c. both a. and b. d. none of the above
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93) What is meant by Kaizen? a. card signal b. to avoid inadvertent errors c. change for better quality d. none of the above
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94) What is the effect of sample size on probability of acceptance? a. sample size has no effect on probability of acceptance b. as number of items in a sample decrease, higher is the possibility of number of defectives thereby probability of acceptance decreases c. as number of items in a sample increase, higher is the possibility of number of defectives thereby probability of acceptance decreases d. none of the above
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95) Lot Tolerance Percent Defective is also known as? a. rejectable quality level b. acceptance quality level c. indifferent quality level d. all of the above
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96) Which of the following gives actual measurement of any specific dimension? a. Inspection by variables b. Inspection by attributes c. Both a. and b. d. None of the above
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97) Match the following group 1 (charts) with group 2 (use) and select the correct option. 1. R chart ———————————————– A. study the number of defects per unit a. 1 – A, 2 – B, 3 – D, 4 – C b. 1 – C, 2 – D, 3 – B, 4 – A c. 1 – A, 2 – D, 3 – B, 4 – C d. 1 – C, 2 – A, 3 – D, 4 – B
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98) Relaxed ambiance for group participation is observed in which type of brain storming sessions? a. structured sessions b. unstructured sessions c. both a. and b. d. none of the above
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99) Which award is presented to different organizations for quality and excellent performance by president of USA? a. Malcolm Balbridge National Award b. Dr. W. Edward Deming National Award c. US Excellence Award d. None of the above
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100) According to Juran’s triology diagram, what is the shaded region called? a. zone of control b. chronic waste c. sporadic spike d. none of the above
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101) According Juran’s Triology, which of the following actions is performed under planning procedure? a. choosing control subjects b. organizing project teams c. project establishment d. deal with resistance to change
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102) According to laser Doppler principle, light experiences a change in its frequency when it comes in contact with a moving object depending upon a. the velocity of the object b. the direction of the object c. both a. and b. d. none of the above
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103) Which of the following statements is/are false for Co-ordinate measuring machine? a. Conventional comparators have greater accuracy than co-ordinate measuring machines b. Gantry type of co-ordinate measuring machine use inductive transducers for measurement c. Loading and unloading operations are easily done by cantilever type of co-ordinate measuring machine d. All the statements are false
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104) Which type of tooth profile has double curvature? a. cycloidal tooth profile b. involute tooth profile c. both a. and b. d. none of the above
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105) Smooth motion in involute tooth profile is possible due to a. variation in pressure angle b. constant pressure angle c. Both a. and b. d. None of the above
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106) What is used to measure the major diameter of an external thread? a. Bench micrometer b. Thread micrometer c. One wire method d. All of the above
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107) Which type of errors show linear relation between cumulative pitch error and length of thread? a. Periodic errors b. Progressive errors c. Both a. and b. d. None of the above
| ||
108) Which among the following is a type of direct measuring instrument of roughness? a. Micro interferometer b. Wallace surface dynamometer c. Profilometer d. None of the above
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109) Which among the following causes first order surface irregularity? a. Lack of straightness b. Lack of rigidity c. Feed and speed d. Vibrations
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110) Which type of surface, has a fringe pattern shown below? a. Sphere b. Cylinder c. Conical d. Spheroid
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111) Which type of fringe is formed, if a path difference of λ/2 is observed in an interference pattern? a. Dark fringe b. Bright fringe c. Both bright and dark fringe overlap d. Unpredictable
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112) Which among the following is a type of clearance fit? a. Force fit b. Push fit c. Slide fit d. Tight fit
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114) The out of roundness δ for least square circle is given as a. δ = δp – δv b. δ = δp + δv c. δ = δr d. None of the above
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115) Indicator method is used to test a. straightness b. squareness c. flatness d. all of the above
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116) Overall magnification of optical comparators is given as a. (4 d / f) x ( magnification of eye piece) b. (2 f / d) x ( magnification of eye piece) c. (4 f / d) x ( magnification of eye piece) d. (2 d / f) x ( magnification of eye piece)
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117) Which type of comparator changes its magnification, when distance between cross strip hinge and knife edge is varied? a. Johansson mickrocator b. Solex pneumatic comparator c. Projector comparator d. Sigma comparator
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118) What is the type of instrument shown below? a. Bore gauge b. Telescopic gauge c. Slip gauge d. None of the above
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119) Which among the following is an optical instrument? a. angle dekkor b. autocollimator c. both a. and b. d. none of the above
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120) Which of the following causes is/are responsible for systematic errors? a. non linearity b. change in sensitivity c. zero offset d. All of the above
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121) Which of the following statements is/are true? a. Pyrometer is a non-contact type of instrument b. Stroboscope is a contact type of instrument c. Micrometer is a non-contact type of instrument d. All of the above
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122) Match the following group 1 items with group 2 items 1. Sort ————————————————– A. Seitan a. 1 – D, 2 – A, 3 – B, 4 – C b. 1 – C, 2 – A, 3 – D, 4 – B c. 1 – B, 2 – C, 3 – A, 4 – D d. 1 –A, 2 – C, 3 – D, 4 – B
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123) What is the aim of fool proofing technique used for total quality management? a. to achieve zero defects b. to specify time schedules c. to specify targets d. none of the above
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124) What are the factors causing sampling error? a. method of sample selection b. sample size c. both a. and b. d. none of the above
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125) In a lot size of 10000, probability of acceptance is 0.483 for 0.4% defectives. The number of defectives are not replaced, assume a. 1.123 b. 0.1932 c. 0.789 d. None of the above
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126) The distribution of measured data can be studied by using a. X chart b. R chart c. both X and R chart d. None of the above
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127) Which among the following is a type of control chart for variables? a. C chart b. P chart c. X chart d. U chart
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128) Fish bone diagram is also known as? a. Cause and effect chart b. Ishikawa diagram c. Both a. and b. d. None of the above
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129) Who among the following suggested seven quality tools for controlling quality? a. Juran b. Kaoru Ishikawa c. Dr. W. Edward Deming d. Feigenbaum
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130) According to ISO 8402, quality is defined as a. the totality of features and characteristics of a product or service that bears on its ability to satisfy given needs b. the totality of features and characteristics of a product or service that bears on its ability to satisfy stated or implied needs c. the minimum loss imparted by the product to satisfy from the time the product is dispatched d. none of the above
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131) Match the following group 1 items (Authors) with group 2 items (Definitions) 1. Juran ————————————————- A. Quality is conformance to requirements a. 1 – A, 2 – D, 3 – B, 4 – C b. 1 – C, 2 – A, 3 – D, 4 – B c. 1 – B, 2 – A, 3 – C, 4 – D d. 1 – D, 2 – A, 3 – B, 4 – C
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132) Which among the following machines can inspect geometric features of different components? a. Co-ordinate measuring machines b. Universal measuring machines c. Both a. and b. d. None of the above
| ||
133) Universal measuring machine is a combination of a. Tool maker’s microscope and Parkinson’s gear tester b. Tool maker’s microscope and optical measuring machine c. Parkinson’s gear tester and optical measuring machine d. None of the above
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134) Which of the following statements is/are true? a. Parkinson’s gear tester is used to measure variation in centre distance b. Tool maker’s microscope is used to measure tooth thickness c. Teeth having wider flanks have less strength d. All the above statements are true
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135) Spiral gears are used to transmit power when the shafts are a. parallel b. interesting c. parallel and intersecting d. neither parallel nor intersecting
| ||
136) Why are pitch errors observed in threads? a. Lack of inspection b. Incorrect ratio of tool work velocity c. Interference between mating parts d. All of the above
| ||
137) Which thread has a combined strength of square thread and V thread? a. Acme thread b. Knuckle thread c. Buttress thread d. British standard Whitworth thread
| ||
138) What does effective profile mean, while defining a surface texture? a. Workpiece having repetitive irregularities b. Roughness can be measured in this imaginary profile c. Real contour of a surface d. All of the above
| ||
139) Match the following Group 1 items with Group 2 items 1. Flaw ———————————————- A. Secondary texture a. 1 – A, 2 – B, 3 – D, 4 – C, 5 – E b. 1 – D, 2 – E, 3 – D, 4 – C, 5 – C c. 1 – E, 2 – D, 3 – B, 4 – A, 5 – C d. 1 – C, 2 – A, 3 – D, 4 – B, 5 – E
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140) An interferometer is used to measure a surface of 1.85 mm. Calculate number of fringes, when λ = 0.659 μm. a. 5614.567 b. 5000.236 c. 2807.283 d. None of the above
| ||
141) A surface of 2.1 mm is to be measured using a interferometer. Calculate nominal fraction for blue light which has wavelength of 0.785 μm. a. 0.8280 b. 0.5350 c. 0.3185 d. 0.1910
| ||
142) Which of the following statements is/are false? a. Interference is observed in tight fit b. Allowance represents minimum interference for interference fits c. Clearance is observed in push fit d. All of the above
| ||
143) What does allowance represent in clearance fits? a. It represents minimum clearance and is positive b. It represents maximum clearance and is positive c. It represents minimum clearance and is negative d. It represents maximum clearance and is negative
| ||
144) What is a least square line? a. A line which has sum of errors minimum b. A line which has sum of difference of errors minimum c. A line which has sum of squares of errors minimum d. None of the above
| ||
145) Which method is used to test the straightness of an object? a. Indicator method b. Interference method c. Wedge method d. All of the above
| ||
146) Which of the following statements are true? 1. Mechanical comparators are compact and easy to handle a. 1 and 2 b. 3 and 4 c. 1 and 3 d. All of the above
| ||
147) Johansson mickrocator is a type of a. mechanical optical comparator b. mechanical comparator c. optical comparator d. electrical comparator
| ||
148) Which of the following is not a type of direct measuring instrument? a. Micrometer b. Vernier caliper c. Divider d. All of the above
| ||
149) Match the following Group 1 items (Grades) with Group 2 items (application) and select the correct option 1. Grade I ———————————– A. high precision task a. 1-A, 2-C, 3-D, 4-B b. 1-C, 2-D, 3-A, 4-B c. 1-B, 2-A, 3-C, 4-D d. 1-D, 2-B, 3-A, 4-C
| ||
150) Which of the following processes is used to monitor space signals of a space craft? a. Stroboscope b. Telemetry c. Pyrometer d. None of the above
|
151) The study of scientific metrology deals with
accuracy and methods of measurement
standard specifications
theories related to nature
all of the above
ANSWER: theories related to nature |
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