« Back CONTENTS Next » 1. Arc in a circuit breaker is interrupted at (A) zero current. (B) maximum current. (C) minimum voltage. (D) maximum voltage. 2. Induction cup relay operates when there is changes in (A) voltage. (B) current. (C) impedance. (D) all of the above. 3. The arcing […]
Electrical MCQ
MCQ on Synchronous motor – 1
« Back CONTENTS Next » 1. The construction of a synchronous motor is similar to (A) a series motor. (B) an induction motor. (C) an alternator. (D) a shunt motor. 2. Exciters of synchronous machines are (A) synchronous machines. (B) d.c. shunt machines. (C) d.c. series machines. (D) d.c. compound machines. […]
MCQ on Measuring Instruments – 4
« Back CONTENTS Next » 1. Which wave has the least value of form factor? (A) Square wave. (B) Rectangular wave. (C) Sine wave. (D) Triangular wave. 2. Which of the following is most sensitive galvanometer? (A) Double galvanometer. (B) Spot ballistic galvanometer. (C) Elastic galvanometer. (D) Vibration galvanometer. 3. […]
MCQ on Measuring Instruments – 3
« Back CONTENTS Next » 1. In order to create stationary magnetic field in permanent magnet moving coil instrument it uses (A) only one permanent magnet. (B) two permanent magnets. (C) electromagnet. (D) none of the above. 2. Schering bridge is used to (A) determine capacitance. (B) determine inductance. (C) […]
MCQ on Measuring Instruments – 2
« Back CONTENTS Next » 1. In moving iron instruments, the damping torque is provided by (A) fluid friction damping. (B) air friction damping. (C) eddy current damping. (D) none of these. 2. The pointer of an indicating instrument is generally made of (A) copper. (B) aluminium. (C) brass. (D) […]
MCQ on Measuring Instruments – 1
« Back CONTENTS Next » 1. Which of the following meter is an integrating type instrument? (A) Ammeter. (B) Voltmeter. (C) Wattmeter. (D) Energy metre. 2. Creeping in energy metre implies (A) slow rotation of rotor with only voltage coil excited. (B) slow rotation of rotor with only current coil […]