Electrical Engineering MCQ Questions and Answers for Competitive Examinations.
1- The device used for measurement of temperatures exceeding 1500°C is
(A) Thermopile
(B) Thermocouple
(C) Radiation Pyrometer
(D) Resistance Temperature Detector
2- Synchronous motor operates at
(A) Unity power factor only
(B) Lagging power factor only
(C) Leading power factor only
(D) All of the above
3- Logic circuits are
(A) hybrid circuits
(B) analog circuits
(C) digital circuits
(D) none of the above
4- Following is (are) the desirable static characteristics of a measuring system
(A) Reproducibility
(B) Accuracy
(C) Sensitivity
(D) All of the above
5- Most suitable motor for electric traction is
(A) DC shunt motor
(B) DC series motor
(C) DC compound motor
(D) All of the above
6- The power factor of an alternator depends on
(A) armature losses
(B) core losses
(C) speed of rotor
(D) type of load
7- Hydraulic power of a pump is
(A) proportional to square of density of fluid
(B) not affected by density of fluid
(C) inversely proportional to density of fluid
(D) proportional to density of fluid
8- Which of the following motors is used in conventional ceiling fan?
(A) Induction motor
(B) Series motor
(C) Synchronous motor
(D) Universal motor
9- Power output of a fan is based on
(A) Air temperature
(B) Air flow rate
(C) Fan volume and fan total pressure
(D) All of the above
10- Following is the value of average resistance of human body
(A) 10 ohm
(B) 100 ohm
(C) 1000 ohm
(D) 10000 ohm
11- Peterson coil is used for
(A) connecting two interconnected systems
(B) grounding of system neutral
(C) reducing fault of system
(D) none of the above
12- Busbars are mainly made of
(A) Nickel
(B) Iron
(C) Lead
(D) Aluminium
13- MCCB stands for ___ circuit breaker.
(A) moulded case
(B) modulated case
(C) mains case
(D) mixed case
14- What type of relay is best suited for protection of radial feeders?
(A) earth leakage
(B) induction type
(C) definite time current
(D) overload
15- The unit of Reactive power is
(A) KW
(B) KVA
(C) VAR
(D) KWH
16- Which one of the following bridges is used for measurement of dielectric loss and power factor of a capacitor?
(A) Schering bridge
(B) De Sauty’s bridge
(C) Anderson bridge
(D) Maxwell’s bridge
17- Pole changing method of speed control is used in
(A) squirrel cage induction motor
(B) dc series motor
(C) dc shunt motor
(D) slip ring induction motor
18- Which of the following horsepower is obtained from motor shaft?
(A) overall output
(B) Friction Horse Power (FHP)
(C) Brake Horse Power (BHP)
(D) Indicated Horse Power (IHP)
19- Accumulator is
(A) keyboard
(B) counter
(C) register
(D) both counter and register
20- The power of a solar cell is supplied at a voltage of
(A) 0.5-0.6 V
(B) 5-6 V
(C) 50-60 V
(D) 500-600 V
ANSWERS:
1-(C), 2-(A), 3-(C), 4-(D), 5-(B), 6-(D), 7-(D), 8-(A), 9-(C), 10-(C), 11-(B), 12-(D), 13-(A), 14-(B), 15-(C), 16-(A), 17-(A), 18-(C), 19-(C), 20-(A)