Home Topics Quiz Login

Transformers MCQ Questions & Answers

Transformers MCQs : This section focuses on the "Basics" of Transformers. These Multiple Choice Questions (MCQs) should be practiced to improve the Transformers skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A _________ is a passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits.

A. voltage regulation
B. autotransformer
C. transformer
D. phase conversion

View Answer

Question 2

Transformers are most commonly used for ?

A. increasing low AC voltages at high current
B. decreasing high AC voltages at low current
C. increasing high AC voltages at low current
D. Both A and B

View Answer

Question 3

Transformers can also be used for isolation?

C. Can be true or false
D. Can not say

View Answer

Question 4

The first constant-potential transformer invented in?

A. 1880
B. 1885
C. 1890
D. 1895

View Answer

Question 5

Transformer losses arise from?

A. Winding joule losses
B. Stray losses
C. Eddy current losses
D. All of the above

View Answer

Question 6

In a transformer the resistance between its primary and secondary is ______________

A. Zero
B. Very small
C. Infinite
D. Can not say

View Answer

Question 7

An ideal transformer will have maximum efficiency at a load such that _____________

A. copper loss = iron loss
B. copper loss < iron loss
C. copper loss > iron loss
D. Can not say

View Answer

Question 8

What is the no-load current drawn by transformer?

A. 0.2 to 0.5 per cent
B. 2 to 5 per cent
C. 12 to 15 per cent
D. 20 to 30 per cent

View Answer

Question 9

A transformer oil used in an electrical transformer must be free from ________

A. Gases
B. Odour
C. Sludge
D. Moisture

View Answer

Question 10

Which of the following is not an Applications of transformers?

A. transformer used for impedance matching
B. transformer used for isolate four circuits electrically
C. used to increase or decrease the alternating voltages in electric power applications
D. transformer used in voltmeter, ammeters, protective relay

View Answer