Transformer MCQs Part 39

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Electrical Engineering MCQ on Transformer

A transformer oil must be free from

A transformer oil must be free from

  1. Gases
  2. Moisture
  3. Odour
  4. Sludge

Correct answer: 2. Moisture

The electric motor that is preferred for use in mines where explosive gases exist

The electric motor that is preferred for use in mines where explosive gases exist

  1. Air motor
  2. Induction motor
  3. Shunt motor
  4. Synchronous motor

Correct answer: 1. Air motor

In case of 3-phase induction motors, the term plugging implies

In case of 3-phase induction motors, the term plugging implies

  1. Interchanging two supply phases for quick stopping
  2. Locking of rotor due to harmonics
  3. Pulling the motor directly on line without a starter
  4. Starting the motor on load which is more than the rated load

Correct answer: 1. Interchanging two supply phases for quick stopping

The part of a transformer that is visible from outside

The part of a transformer that is visible from outside

  1. Bushings
  2. Core
  3. Primary winding
  4. Secondary winding

Correct answer: 1. Bushings

Noise level test in a transformer is a

Noise level test in a transformer is a

  1. Routine test
  2. Special test
  3. Type test
  4. None of above

Correct answer: 3. Type test

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