
Electrical Engineering MCQs with Answers
Electrical Engineering MCQs helps to pass the initial tests of Army Lady Officers who want to join Pak Army through Lady Cadet Corps, Engineering Branch of PAF or Naval Commission.
If you have degree in Electrical Engineering then you may study all questions given below which are very helpful as past experience or past papers of LCC and other initial tests of PAF and Navy.
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Electrical Engineering MCQs PDF
Electrical Engineering MCQs (Part-01)
- Three-phase Induction motor
- Shunt motor
- Synchronous motor
- Differential compound motor
Answer: Option d.
Which of the given networks are based on the compensation theorem?
- Unilateral network
- Bilateral network
- Linear and non-linear network
- Distributed network
Answer: Option c.
The ratio of the Mechanical Impedance is
- RMS force to RMS displacement
- RMS velocity to RMS acceleration
- RMS force to RMS velocity
- RMS current to RMS speed
Answer: c
- W1= 34.875 and W2 = 5.125
- W1= 33.875 and W2 = 6.125
- W1 = 38.875 and W2 = 6.125
- W1 = 32.875 and W2 = 5.125
Answer: b
Under no-load conditions, the transmission line carrying a current because of
- Heating effect
- Capacitance effect
- Chemical effect
- Transmission effect
Answer: b
In a synchronous machine, the V curve is drawn between which of the given axis.
- Field current on X-axis and no-load current on Y-axis
- Armature current on X-axis and the no-load current in Y-axis
- Field current on X-axis and armature current on Y-axis
- Armature current on X-axis and filed current on Y-axis
Answer: c
- Joint thick sheets
- Rough surface
- Thin metal sheets(10-12mm)
- T shape welding
Answer: c
- 1
- 1.5
- 1.75
- 2
Answer: b
The single-phase reluctance machine works as a generator when the value of ? is
- Infinitive
- Zero
- Unity
- Positive
Answer: d
- 23 A
- 2.23 A
- 3.33 A
- 4.33 A
Answer: b
The Primary reason for D.C. motor Preferred over A.C. motor
- Constant speed operation
- High-speed operation
- Variable speed operation
- Low-speed operation
Answer: c
- 5W bulb
- 50W bulb
- 25W bulb
- 10W bulb
Answer: a
- 2
- 4
- 6
- 8
Answer: d
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Electrical Engineering MCQs Book
Electrical Engineering MCQs (Part-02)
- 10:1
- 20:1
- 1:15
- 1:13
Answer: a
- (0020)H
- (0030)H
- (0040)H
- (0010)H
Answer: c
The purpose of dummy coil in D.C. machine is
- to reduce losses
- to Improve machine efficiency
- to maintain a mechanical balance of armature
- to reduce the cost of the machine
Answer: c
- 25
- 85
- 105
- 120
Answer: b
A bulb of power rating 9kW draws a current 30 A. Find the applied Voltage
- 220 V
- 240 V
- 280 V
- 300 V
Answer: d
In the MKS system, the value of 3 kW is equal to
- 013Hp
- 3.013Hp
- 4.021Hp
- 5.021Hp
Answer: c
The resistivity of a conductor depends on
- Length
- Current
- Voltage
- Power
Answer: a
- 500 W
- 600 W
- 1500 W
- 1600 W
Answer: b
- 2
- 0.4
- 0.6
- 0.8
Answer: c
- Low Frequencies
- Power Frequencies
- High frequencies
- All of these
Answer: b
- 40
- 50
- 60
- 70
Answer: b
In an intrinsic semiconductor, the number of holes is ……. the number of electrons.
- Equal to
- More than
- Less than
- None of these
Answer: a
Find the value of emitter current of a transistor that has ADC = 0.5 and base current = 120 µA
- 01 mA
- 1.24 mA
- 0.04 mA
- 0.24mA
Answer: d
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Electrical Engineering MCQs for NTS
Electrical Engineering MCQs (Part-03)
Which of the given material is used for making light-emitting diodes?
- Si
- Ge
- GaAs
- Fe
Answer: c
Noise is a function of which of the given term
- Momentum
- Acceleration
- Voltage
- Bandwidth
Answer: d
The displacement measuring Instrument LVDT works on the principle of
- Fleming Left-hand rule
- Mutual Induction
- Linear induction
- Linear capacitance
Answer: b
Which of the given material does not change the resistance with varying temperature
- Gallium
- Manganin
- Tungsten
- Copper
Answer: b
- 5
- 0.6
- 0.7
- 0.8
Answer: c
Which of the following is a series type unbalanced fault that occurs in a power system
- Single line to double line fault
- Double line to double line fault
- The line to line fault
- Open conductor fault
Answer: d
The three-phase oil circuit breaker rated as 2000 MVA, 66 K.V., 6 SEC. Find the making current
- 44 kA
- 19.43 kA
- 22.76 kA
- 27.55 kA
Answer: b
- 1288 W
- 1596 W
- 2033 W
- 2522 W
Answer: b
Which of the given relays can resist the possible major fault in the transformer
- Current relay
- Frequency relay
- Buchholz relay
- Overcurrent relay
Answer: c
- 5532 V
- 6625 V
- 6235 V
- 7325 V
Answer: c
Which of the given diode is called hot-carrier dioxide?
- N. junction diode
- Schottky diode
- Light-emitting diode
- Zener diode
Answer: b
In a transformer, the humming sound is primarily due to
- Overflow of oil
- Magnetostriction
- Flux leakage
- Lamination of transformer
Answer: b
When a 20 A current flows for 6 minutes, calculate the amount of electricity transferred.
- 7200 C
- 6400 C
- 8400 C
- 5400 C
Answer: a
Find the barrier potential for Si junction diode at 100 C, calculate its value at 400 C is 0.9 V
- 75 V
- 0.96 V
- 1.20 V
- 0.60
Answer: b
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Electrical Engineering MCQs for Job Test
Electrical Engineering MCQs (Part-04)
- 2:7
- 3:7
- 4:7
- 5:7
Answer: b
The voltage range is non uniform. Its type is
- Electrostatic instrument
- Potentiometer
- Galvanometer
- Multimeter
Answer: a
Which of the given test is used for the calculation of the inertia of the rotor?
- Sinners test(Back to Backtest)
- Low voltage test
- High Voltage test
- Retardation test
Answer: d
- 07 Ω
- 0.09 Ω
- 0.11 Ω
- 0.03 Ω
Answer: d
Find the numbers of address lines needed to address a memory size 64K
- 10
- 12
- 14
- 16
Answer: d
- 26 kW
- 0.54 kW
- 0.10 kW
- 0.99 kW
Answer: b
In an induction motor, crawling is caused by
- High Voltage
- Heavy loads
- Harmonic produced in the motor
- Improper design of machine
Answer: c
In a ferromagnetic material, the neighboring atomic magnetic moments are
- Predominantly unequal in small regions of material.
- Predominantly constant in small regions of material.
- Predominantly unequal and parallel throughout the material.
- Predominantly equal and parallel throughout the material.
Answer: d
N-type and P-type extrinsic semiconductors are formed by adding the impurities of which valency.
- Tertavalent and pentavalent
- Trivalent and pentavalent
- Pentavalent and trivalent
- Trivalent and tetravalent.
Answer: b
- 1600 V
- 1792 V
- 1982 V
- 2020 V
Answer: c
- 1/3
- 2/3
- 5/3
- 1
Answer: b
In which of the given single-phase motor, the rotor has no teeth or winding?
- Shaded pole motor
- Capacitor start motor
- A permanent capacitor run the motor
- Hysteresis motor
Answer: d
- 1 joule/weber
- 1 joule/ columb
- 1 joule/ohm
- 1 watt/ Joule
Answer: b
- 111
- 121
- 144
- 169
Answer: b
- 5
- 0.75
- 0.72
- 0.80
Answer: c
- 8100
- 7200
- 5900
- 4700
Answer: c
A negative sequence really is usually used to protect
- A transformer
- An Alternator
- A transistor
- A Junction
Answer: b
- Digital Instrument
- Deflection type instrument
- Null type instrument
- None of these
Answer: c
- 67
- 4.28
- 9.85
- 7.47
Answer: b
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