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Electrician
Electrician Set-1
Transformers
30

Transformers MCQ - Electrician (Set-1) with Answers

30) When a transformer is operating on no. load, the primary applied voltage is approximately balanced by

Secondary induced e.m.f.

Primary induced e.m.f.

Terminal voltage across the secondary

Voltage drop across resistance and reactance

Answer is:

Primary induced e.m.f.

Transformers MCQ - Electrician (Set-1) with Answers

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Related Transformers MCQ - Electrician (Set-1) with Answers

31) Which one of the following methods will be preferred for a transformer cooling, above 200 kVA ?

Insulating oil

Air blast

Oil natural, Air forced

Oil forced, Water forced

Answer is:

Insulating oil

32) Scott connections are used to transform :

single-phase supply into three-phase supply

single-phase supply into two-phase supply

three-phase supply into two-phase supply

star-connected primary into delta-connected secondary

Answer is:

three-phase supply into two-phase supply

33) Which type of connection in 3 phase transformers is used for the sub-station end of the transmission lines ?

Star-star

Star-delta

Delta-Delta

Delta-star

Answer is:

Star-delta

34) In three phase transformer, different methods of connections are possible. Which type of connection used in distribution transformer ?

Star-star

Star-delta

Delta-Delta

Delta-star

Answer is:

Delta-star

Transformers MCQ - Electrician (Set-1) with Answers

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