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MCQs 1: Which among these tests are included in high voltage tests?

Power wet test Impulse voltage withstand tests Power frequency withstand test 1 minute dry Only a and b All of these
Answer Explanation

MCQs 2: What parameter(s) is / are checked using the commissioning tests?

Turbine speed Condenser vacuum Turbine governor valve opening Only b and c All of these
Answer Explanation

MCQs 3: At what angle difference is the main winding and the start winding separated in a spilt phase capacitor start induction motor?

45° electrical 90° electrical 45° mechanical 90° mechanical
Answer Explanation

MCQs 4: What is the use of current transformers?

Stepping up AC current Measuring and protection Stepping down AC current Both (b) and (c) All of these
Answer Explanation

MCQs 5: What is the typical value of the capacitor used in ‘capacitor start capacitor run’ induction motor?

5 μ F 40 μ F 300 μ F 1000 μ F
Answer Explanation

MCQs 6: Which among these is the application of universal motors?

Vacuum cleaners Fans Hair dryers Washing machines
Answer Explanation

MCQs 7: Which type of enclosure is provided for DC motors used in coal handling plants?

Screen protected Open type Totally enclosed fan cooled Drip proof
Answer Explanation

MCQs 8: Which among the following applications uses ward Leonard method of speed control?

Rolling mills Colliery winding motor Lifts and elevators Only a and c All of these
Answer Explanation

MCQs 9: What is meant by equaliser bus?

The bus connecting series fields in parallel The bus connecting series fields in series The bus connecting shunt fields in parallel The bus connecting shunt fields in series
Answer Explanation

MCQs 10: What is the purity of electrically graded aluminium?

95 % 98.3 % 99.5 % 97.5 %
Answer Explanation

MCQs 11: Which alloy is used as electrical resistance alloy?

Nickel alloys Nickel chromium alloys Ferro nickel alloys Only a and b All of these
Answer Explanation

MCQs 12: Which material can be used upto a temperature of 130° C?

Mica Cotton Synthetic resin All of these
Answer Explanation

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