MCQs

Open circuit test is performed on the transformer to determine: Core losses Copper losses  Correct answer: 1. Core losses

Transformer Short circuit test is used to determine which type of losses: Core losses Copper losses  Correct answer: 2. Copper losses

In electric transformer, the path of a magnetic flux should have: Low resistance Low reluctance High resistance High reluctance Correct answer: 2. Low reluctance

The First step in installing transmission lines: Framing ROW clearance Pulling Sagging Correct answer: 2. ROW clearance

UV radiation is expected to accelerates the aging of which of the following insulator: Porcelain Glass Non-ceramic composite insulators All of these Correct answer: 3. Non-ceramic composite insulators

Generation voltage in modern power stations is around: 5 to 10 kV 10 to 15 kV 15 to 25 kV 25 to 75 kV Correct answer: 3. 15 to 25 kV

Line-to-ground voltage = Line-to-line voltage divided by the square root of 2 Line-to-line voltage multiplied by the square root of 2 Line-to-line voltage divided by the square root of 3 Line-to-line voltage multiplied by the square root of 3 Correct answer: 3. line-to-line voltage divided by the square root of 3

Three-phase AC system operating frequency in the UK is: 100 Hz 80 Hz 60 Hz 50 Hz Correct answer: 4. 50 Hz

The operating frequency of three-phase AC system in the U.S. is: 100 Hz 80 Hz 60 Hz 50 Hz Correct answer: 3. 60 Hz

The turbo generator have rotor type construction: Non-salient pole Salient pole Correct answer: 1. Non-salient pole Explanation: The turbo-alternators utilize Non-Salient pole rotor because the turbo alternator operates at high speeds.