Explore topic-wise MCQs in Transformers.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.

1.

Short circuit method is used for _____________

A. drying out the transformer and oil simultaneously in the transformer tank
B. drying the transformer only, out of its tank.
C. for any type of drying
D. never used
Answer» D. never used
Discussion
2.

Which readings should be taken while drying out process of transformer?

A. Insulation reading between HV and LV
B. Temperature
C. Time
D. Insulation, temperature, time all readings
Answer» E.
Discussion
3.

For 400 kV transformer, moisture content required is _______________

A. below 0.1%
B. below 0.5%
C. above 0.5%
D. below 1%
Answer» C. above 0.5%
Discussion
4.

WHICH_READINGS_SHOULD_BE_TAKEN_WHILE_DRYING_OUT_PROCESS_OF_TRANSFORMER??$

A. Insulation reading between HV and LV
B. Temperature
C. Time
D. Insulation, temperature, time all readings
Answer» E.
Discussion
5.

Short_circuit_method_is_used_for______________$

A. drying out the transformer and oil simultaneously in the transformer tank
B. drying the transformer only, out of its tank.
C. for any type of drying
D. never used
Answer» D. never used
Discussion
6.

For 400 kV transformer, moisture content required is ______________?

A. below 0.1%
B. below 0.5%
C. above 0.5%
D. below 1%
Answer» C. above 0.5%
Discussion
7.

After site erection vacuum is made with pressure range of ___________

A. 1 mbar
B. 3 mbar
C. 7 mbar
D. 15 mbar
Answer» D. 15 mbar
Discussion
8.

Materials used in construction of transformer are stressed ______________

A. electrically
B. mechanically
C. both electrically and mechanically
D. magnetically
Answer» D. magnetically
Discussion
9.

When oil filling procedure has to be started?

A. After fitting of all bushings
B. After replacing access covers
C. After erection of conservator and Buchholz pipework
D. After fitting bushings, replacing covers, erecting pipework
Answer» E.
Discussion
10.

If any transformer is not in operation for some months, still it is advisable to keep it filled with _______________

A. nitrogen
B. oil
C. normal air
D. hydrogen helium mixture
Answer» C. normal air
Discussion
11.

While transformer is transported, its valves are _______________

A. kept open
B. closed with blanking plates
C. can be kept open or can be closed according to type
D. valves are absent
Answer» C. can be kept open or can be closed according to type
Discussion
12.

When all additional clamping is removed from a transformer?

A. When transformer is made start
B. After start of transformer function
C. Instant before start of transformer function
D. At the time of installations
Answer» E.
Discussion
13.

Transformers are generally designed for ___________

A. on-site problem solving
B. one-time use
C. off-site problem solving
D. short-time use
Answer» B. one-time use
Discussion