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Weapon Engineering MCQs Online

If you want to join Pakistan Navy in Navy Weapon Engineering Branch through Pakistan Nvy Short Service Commission (SSC) then you must study the given past questions of Weapon Engineering initial tests. All these questions help to score more high in the initial tests included in the academic portion for proceeding to the ISSB. These questions are also helpful to join Pakistan Air Force Engineering branch and EME branch of Pakistan Army.

Free Online MCQs of Weapon Engineering Branch

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Weapon Engineering Quiz

The smallest diameter of an external screw thread is known as ;-

Major diameter

Pitch diameter

Minor diameter

Is it logical to use fluid analogy to understand the phenomenon of stress concentration:-

True

False

What is the calibre of Point 22 Rifle :-

7.62

0.22

0.303

Efficiency of the screw depend upon helix angle but not depend on friction angle :-

False

True

Evaluate required scale factor if ratio of weight of the rubber engine and the actual selected engine is 0.8 :-

6.2

0.8164

0.012

What are the other name of nitrocellulose ;-

Gun base

Gelatinous

Gun cotton

Knuckle joints can't be used to connect two intersecting rods ;-

Yes

A typical turbine engine consist of :-

all of them

Combustion chamber

Compressor

Turbine

In general the fuel weight is represented by a fraction of total take off weight;-

False

True

Which country has the second highest military expenditure for the year 2021 :-

Russia

India

China

Which weapon is used by NCC cadets for firing ;-

22 Rifle

INSAS Rifle

303 Rifle

What was the name of Atomic bomb dropped on the city of Hiroshima :-

Little Boy

Fat boy

Little girl

Which country successfully launched its second military satellite into earth orbit in March 2022 :-

Bhutan

Iran

Nepal

Maximum principal stress theory is not good for brittle materials ;-

False

True

Plastic deformation is greater than elastic deformation;-

True

False

'Cold start ' refers to -

An economic policy

A military doctrine

An environment problem

The method of ensuring that the point of aim and the point of impact is the same for a given range is called :-

Zeroing

Sight alignment

Sight picture

What is the used of turbine :-

Generate work to drive shaft

To increase the pressure

To compress the flow

A warm gear is generally made of ;-

Forged steel

Cast iron

Mild steel

Lewis equation is applied ;-

To the pinion

To the gear

To weaker of the pinion or gear

Which line is most economical :-

Gerber parabola

Soderberg line

Goodman line

The bending stress varies _______ with the distance from the natural axis ;-

Linearly

Squarely

Inversely

Gunmetal is an alloy of copper which ___________ % of zinc ;-

Wings and airfoil both are 3D phenomenon ;-

True

False

A typical wing has aspect ratio of 7 and span of 2 m . If the taper ratio T = 0.2 then find the value of the root chord :-

0.81 m

0.4761 m

0.61 m

Your score is

Q: Which weapon carriage option gives more flexibility to carry different weapons?
(a) Internal carriage
(b) External carriage
(c) Conformal
(d) Rail launch system always
Answer: (b) External carriage

Q: If weapon is mounted at bottom of the fuselage then it is called __________
(a) internal carriage
(b) external always
(c) conformal
(d) rail launch system always
Answer: (c) conformal

Q: Which of the following is a disadvantage of semi-submerged weapon carriage?
(a) Indentation will increase structural weight in this type of weapon carriage
(b) Lowest possible weight
(c) Drag will be more than external carriage
(d) Drag will be lower than that of the external carriage
Answer: (c) Drag will be more than external carriage

Q: Which of the following will produce the lowest drag?
(a) External always
(b) Internal carriage
(c) Conformal
(d) Rail launch system always
Answer: (c) Conformal

Q: Which of the following is an advantage of internal weapon carriage?
(a) RCS is more than conformal
(b) Highest possible RCS
(c) RCS is more than external
(d) Weapon RCS will tend to be none
Answer: (d) Weapon RCS will tend to be none

Q: The subsequent step after the requirements in conceptual design phase is _____
(a) design take-off gross weight
(b) control
(c) stability
(d) lofting
Answer: (a) design take-off gross weight

Q: The “Design take-off gross weight” and “maximum take-off weight” are always interchangeable.
(a) True
(b) False
Answer: (b) False

Q: Design take-off gross weight includes ______
(a) only fuel weight
(b) only crew weight
(c) only payload weight
(d) crew, payload and fuel weights
Answer: (d) crew, payload and fuel weights

Q: Avionics systems are an example of ____ weight.
(a) empty
(b) crew
(c) passenger
(d) payload
Answer: (d) payload

Q: Take-off gross weight of an aircraft is summation of _____
(a) empty and payload weight
(b) fuel, payload, crew, empty and miscellaneous weight
(c) fuel and crew weight
(d) only passenger and crew weight
Answer: (b) fuel, payload, crew, empty and miscellaneous weight

Q: In general, the fuel weight is represented by a fraction of total take-off weight.
(a) True
(b) False
Answer: (a) True

Q: A general aviation aircraft is flying with crew load of 115lb, payload of 220lb and fuel weight of 100lb. Find out the design take-off gross weight of the aircraft, given 95lb empty weight.
(a) 435lb
(b) 241lb
(c) 530lb
(d) 500lb
Answer: (c) 530lb

Q: A jet airliner aircraft is flying with crew load of 150kg, payload of 520lb and fuel weight of 500lb. Find out the empty weight if design take-off gross weight of the aircraft is given 1525lb.
(a) 79kg
(b) 79lb
(c) 170lb
(d) 355lb
Answer: (d) 355lb

Q: Cessna 172R has total gross weight of the 1110.98kg with fuel capacity of 210 kg and weight of crew and passenger is 125kg. Find out empty weight fraction.
(a) 775.98kg
(b) 69.84kg
(c) 0.6984
(d) 0.6984lb
Answer: (c) 0.6984

Q: A Jet transport aircraft is flying with crew load of 175kg, payload of 1400kg and fuel weight of 500kg. Find out Fuel to empty weight fraction, if design take-off gross weight of the aircraft is 5600lb.
(a) 0.1831
(b) 1.076
(c) 0.196
(d) 0.1418
Answer: (c) 0.196

Rubber-Engine Sizing

Q: Process of determining the take-off gross weight and required fuel weight is called as ________
(a) aircraft drafting
(b) aircraft Lofting
(c) aircraft sizing
(d) aircraft drawing
Answer: (c) aircraft sizing

Q: We can provide sizing based on new design only.
(a) True
(b) False
Answer: (b) False

Q: Which of the following is correct?
(a) Rubber engine is fixed during sizing
(b) Rubber engine can be stretched during A/C sizing
(c) Lift is always same as engine thrust
(d) Engine sizing will be same for every A/C in the world
Answer: (b) Rubber engine can be stretched during A/C sizing

Q: As weight varies, rubber engine _______
(a) will change as half always
(b) cannot be scaled accordingly
(c) remain fix
(d) can be scaled accordingly
Answer: (d) can be scaled accordingly

Q: The rubber engine can be sized for any thrust so we can have desired thrust loading.
(a) True
(b) False
Answer: (a) True

Q: What is rubber engine?
(a) Engine made from rubber
(b) Engine can be rubberized for sizing
(c) Engine is natured rubber
(d) High strength rubber engine
Answer: (b) Engine can be rubberized for sizing

Q: For mission with payload drop, the take-off gross weight W0 is given by ____
(a) W0 = Wcrew + Wdropped payload + Wfixed payload + Wempty
(b) W0 = Wcrew + Wdropped payload + Wfixed payload + Wfuel
(c) W0 = Wcrew + Wdropped payload + Wfixed payload + Wfuel + Wempty
(d) W0 = Wcrew + Wdropped payload + Wfuel + Wempty
Answer: (c) W0 = Wcrew + Wdropped payload + Wfixed payload + Wfuel + Wempty

Q: A general aviation single engine aircraft has gross weight of 2800lb. The aircraft has maximum speed of 130mph. Determine the approximated value of empty weight fraction if, aspect ratio AR is 9, wing loading is 15 and power loading is 12.
(a) 0.5476
(b) 0.6457
(c) 0.8962
(d) 0.9028
Answer: (a) 0.5476

Q: For a given rubber engine, determine fuel burn at combat if combat time is 2.5min.
(a) 2.5
(b) 2.5CT unit
(c) 2.89 unit
(d) 2.63 kg
Answer: (b) 2.5CT unit

Q: An aircraft is climbing and accelerating to reach the cruise mach number of 0.75. If aircraft is accelerating from 0.1M then, what will be the mission segment fuel fraction for this mission?
(a) 0.28958
(b) 0.9258
(c) 0.5289
(d) 0.9821
Answer: (a) 0.28958

Q: A jet fighter is designed to operate at maximum mach of 2.0. Which of the following is approximated value for empty weight fraction if rubber engine sizing is used? Given, W0 = 20000lb, AR = 5, thrust loading T.L. = 0.6 and wing loading W.L. is 25.
(a) 0.526
(b) 0.8532
(c) 0.8109
(d) 0.3562
Answer: (a) 0.526

Q: If supersonic aircraft has fuel fraction of 0.937 as climb and accelerating segment fuel fraction then, find the cruise mach number. Consider aircraft is accelerating from 0.1M.
(a) 2.0
(b) 30.5
(c) 5
(d) 1.4
Answer: (d) 1.4