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Transformers

Transformers
A transformer will work on

AC as well as DC
Ac only
None of the listed here
Dc only

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Transformers
Which motor is preferred for use in mines where explosive gases exist?

Synchronous motor
Shunt motor
Induction motor
Air motor

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Transformers
A transformer transfers electrical energy from primary to secondary usually with a change in ______

Voltage
Time period
Power
Frequency

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Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

0.4
0.2
5
25

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Transformers
A tap changer is used on a transformer for

Adjustment in primary voltage
Adjustment in both primary and secondary
None of the listed here
Adjustments in secondary voltage

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Transformers
The hum in a transformer is mainly attributed to

magnetostriction
oil in the transformer
load changes
mechanical vibrations

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MORE MCQ ON Transformers

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