Transformers questions with answers
123 multiple-choice questions. Open any question for its answer and explanation.
- Which of the following is the most likely source of harmonics in a transformer?
- Two transformers operating in parallel will share the load depending upon their
- Which of the following is not a routine test on transformers?
- The core used in high frequency transformer is usually
- Primary winding of a transformer
- Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds
- Which of the following parts of a transformer is visible from outside?
- In a transformer the resistance between its primary and secondary is
- Which of the following acts as a protection against high voltage surges due to lightning and switching?
- Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in
- In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are
- No-load current of a transformer has
- The transformer laminations are insulated from each other by
- A transformer core is laminated to
- Which of the following protection is normally not provided on small distribution transformers?
- For given applied voltage, with the increase in frequency of the applied voltage
- Insertion of resistance in the rotcir of an induction motor to develop a given torque
- Which type of winding is used in 3phase shell-type transformer?
- Hysteresis loss in a transformer varies as (Bmax = maximum flux density)
- The maximum load that a power transformer can carry is limited by its
- No-load on a transformer is carried out to determine
- A transformer can have regulation closer to zero
- If a transformer is switched on to a voltage more than the rated voltage
- During open circuit test of a transformer
- The no load current in a transformer lags behind the applied voltage by an angle of about