Electrical Engineering Questions with Answers for Competitive Examinations. These Multiple Choice Questions (MCQ) on Electrical Engineering will be beneficial to the students of Electrical Engineering.
1-Solar cells are connected in series in order to
(A) Increase the life of the cell
(B) Increase the thermal rating
(C) Increase the current rating
(D) Increase the voltage rating
2-The instrument used to measure the specific gravity of electrolyte in a battery is
(A) PH meter
(B) Hydrometer
(C) Anemometer
(D) Manometer
3-The unit of reactive power is
(A) Volt (V)
(B) Watt (W)
(C) Volt Ampere (VA)
(D) Volt Ampere Reactive (VAR)
4-Which of the following device does not have negative resistance characteristics?
(A) Field-effect transistor (FET)
(B) Silicon controlled rectifier (SCR)
(C) Tunnel diode
(D) Unijunction transistor (UJT)
5-The storage battery generally used in electric power station is
(A) Lithium-ion battery
(B) Lead-Acid battery
(C) Zinc-Carbon battery
(D) Nickel-Cadmium battery
6-The effective value of a periodic signal is its
(A) Peak value
(B) Root mean square value
(C) Maximum value
(D) Average value
7-Direct coupled amplifiers are used to amplify
(A) very high frequencies
(B) high frequencies
(C) very low frequencies
(D) low frequencies
8-A capacitor stores energy in
(A) rotating magnetic field
(B) electromagnetic field
(C) electric field
(D) magnetic field
9-The primary and secondary winding of an autotransformers are
(A) Magnetically coupled
(B) Conductively coupled
(C) Both (A) and (B)
(D) None of the above
10-Suspension insulators are used when transmission voltage is
(A) steady
(B) fluctuating
(C) low
(D) high
11-A circuit whose properties are not the same in either direction is known as ___ circuit.
(A) Inverted
(B) Reversible
(C) Unilateral
(D) Bilateral
12-Which of the following part of the magnetic path requires largest mmf?
(A) Inductance
(B) Air gap
(C) Core
(D) Coil
13-In a DC motor the unidirectional torque is produced with the help of
(A) Commutator
(B) Brushes
(C) End plates
(D) Both (A) and (B)
14- All ___ are not meshes but all ___ are loops.
(A) Branches, Nodes
(B) Loops, Branches
(C) Loops, Meshes
(D) Meshes, Loops
15-A dual beam Cathode Ray Oscilloscope (CRO) uses
(A) Two time base generator circuit
(B) One electron gun
(C) Two electron guns
(D) Electronic switch
16-Why the slots are slightly skewed in squirrel cage induction motor?
(A) to provide ease of manufacturing
(B) to minimize the use of copper
(C) to reduce the magnetic ham and locking tendency of the motor
(D) to increase the strength of the rotor bars
17-Kirchoff’s current law is based on
(A) Ampere’s circuital law
(B) Faraday’s law
(C) Law of conservation of charges
(D) Law of conservation of energy
ANSWERS:
1-(D), 2-(B), 3-(D), 4-(A), 5-(B), 6-(B), 7-(C), 8-(C), 9-(C), 10-(D), 11-(C), 12-(B), 13-(D), 14-(C), 15-(C), 16-(C), 17-(C)