Power System Protection MCQs Part 16 Which of following is an advantage of isolated neutral system Which of following is an advantage of isolated neutral system? Voltage oscillations Persistent arcing ground Difficulty in earth fault relay All of these Correct answer: 4. All of these. The grounding method that is employed to reduce the tower … Read more
Power Transmission MCQs Part 11 RCC poles usually have a span of RCC poles usually have a span of 250 to 500 m 100 to 150 m 50 to 100 m 5 to 50 m Correct answer: 2. 100 to 150 m Cross arms used in transmission lines are made of Cross arms used in … Read more
Induction Motor MCQs Part 11 A change of 4% of supply voltage to an induction motor will accordingly produce a change of approximately A change of 4% of supply voltage to an induction motor will accordingly produce a change of approximately: 4% in the rotor torque 8% in the rotor torque 16% in the rotor … Read more
Induction Motor MCQs Part 10 A double squirrel-cage induction motor comprises of A double squirrel-cage induction motor comprises of: Two parallel windings in stator Two parallel windings in rotor Two series windings in stator Two rotors moving in opposite direction Correct answer: 2. Two parallel windings in rotor An induction motor can run at synchronous … Read more
Transformer MCQs Part 4 A 3000/150 V, 30 kVA transformer has 50 turns in secondary. What is full load primary current of transformer A 3000/150 V, 30 kVA transformer has 50 turns in secondary. What is full load primary current of the transformer: 1 A 2 A 5 A 10 A Correct answer: 4. 10 … Read more
Power Generation MCQs Part 13 A nuclear power plant is invariably used as A nuclear power plant is invariably used as: Base load plant Stand-by plant Spinning reserve plant Peak load plant Correct answer: 1. Base load plant The maintenance cost is usually high for The maintenance cost is usually high for: Thermal power plants … Read more
Synchronous Motor MCQs Part 2 A 3-phase synchronous motor is running in clockwise direction. When direction of its field current is reversed A 3-phase synchronous motor is running in clockwise direction. When direction of its field current is reversed: Motor will continue to run in same direction Winding of motor will burn Motor will run … Read more
Zener Diode MCQs Part 1 A Zener diode is ________ voltage regulating device A Zener diode is ________ voltage regulating device: Series Shunt Series-shunt None of these Correct answer: 2. Shunt As compared to 10 V Zener diode, the width of 30 V Zener diode will be As compared to 10 V Zener diode, the … Read more
Induction Motor MCQs Part 9 A 3-phase delta connected induction motor is carrying too heavy load and one of its fuses blows out. Afterwards the motor A 3-phase delta connected induction motor is carrying too heavy load and one of its fuses blows out. Afterwards the motor: Will stop and carry heavy current causing permanent … Read more
Transformer MCQs Part 3. Multiple choice questions on Electric transformers with brief explanatory answers and solutions. An ideal transformer is the one that has An ideal transformer is the one that has: Same number of primary and secondary turns Same voltage per turns on primary and secondary side Both of above No losses and leakage … Read more