48) Which material is used for the construction of the power transformer core ?

Mild steel

High carbon steel

Silicon steel

Stainless steel

Answer is:

Silicon steel

Transformers MCQ - Electrician (Set-1) with Answers

For more MCQ's Click Here

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

49) Which type of transformer does not isolate the secondary ?

Potential transformer

Auto transformer

Distribution transformer

Current transformer

Answer is:

Auto transformer

Explanation:

The auto transformer with common winding can not be used as isolation transformer because it has a connection between primary and secondary side. Isolation transformer provides available supplying even if the device is broken.

50) Voltage stabilizers are having auto transformer with tappings or stepless variation depending upon the type of stabilizer. Auto transformer in servo stabilizer is of :

core type

shell type

toroidal type

distributed core type

Answer is:

toroidal type

51) Single turn primary of a current transformer has a turns ratio 10:1. Which one of the following is the primary current if the current measured in secondary is 2 amperes ?

1 ampere

5 ampere

10 ampere

20 ampere

Answer is:

20 ampere

52) As compared to the secondary of a step up transformer, the primary will have :

lower voltage and higher current

higher voltage and higher current

higher voltage and lower current

lower voltage and higher current

Answer is:

lower voltage and higher current

Transformers MCQ - Electrician (Set-1) with Answers

For more MCQ's Click Here