MCQ Questions on Basic Electrical Engineering
1- Which, among the following qualities, is not affected by the magnetic field?
(A) Moving charge
(B) Change in magnetic flux
(C) Current flowing in a conductor
(D) Stationary charge
2- If the flow of electric current is parallel to the magnetic field, the force will be _______.
(A) Infinity
(B) Maximum
(C) Zero
(D) Half the original value
3- Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called _______.
(A) electromagnetic induction
(B) lenz’s law
(C) hysteresis loss
(D) kirchhoff’s laws
4- The laws of electromagnetic induction have been used in the construction of a _______.
(A) galvanometer
(B) voltmeter
(C) electric motor
(D) generator
5- The self-inductance associated with a coil is independent of _______.
(A) current
(B) induced voltage
(C) time
(D) resistance of a coil
6- When the rate of change of current is unity, the induced emf is equal to _______.
(A) thickness of coil
(B) number of turns in coil
(C) coefficient of self-inductance
(D) total flux linked with coil
7- The magnitude of the induced e.m.f. in a conductor depends on the _______.
(A) Amount of flux cut
(B) Flux density of the magnetic field
(C) Amount of flux linkages
(D) Rate of change of flux-linkages
8- The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as _______.
(A) Self-inductance
(B) Mutual inductance
(C) Series aiding inductance
(D) Capacitance
9- Which circuit element(s) will oppose the change in circuit current?
(A) Resistance only
(B) Inductance only
(C) Capacitance only
(D) Inductance and capacitance
10- Which of the following materials is the most suitable for making a permanent magnet?
(A) Soft Iron
(B) Nickel
(C) Copper
(D) Steel
11- On which of the following routine tests are conducted?
(A) Oil circuit breakers
(B) Air blast circuit breakers
(C) Minimum oil circuit breakers
(D) All of the above
12- In a synchronous machine, hunting is predominantly damped by
(A) Mechanical losses in the rotor
(B) Iron losses in the rotor
(C) Copper losses in the stator
(D) Copper losses in the rotor
13- The speed of a D.C. shunt motor more than its full-load speed can be obtained by
(A) Decreasing the field current
(B) Increasing the field current
(C) Decreasing the armature current
(D) Increasing the armature current
14- With which of the following, a circuit breaker must be equipped for remote operation?
(A) Inverse time trip
(B) Time-delay trip
(C) Shunt trip
(D) All of the above
ANSWERS:
1-(D), 2-(C), 3-(A), 4-(D), 5-(D), 6-(C), 7-(D), 8-(A), 9-(B), 10-(D), 11-(D), 12-(D), 13-(A), 14-(C)