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Autotransformer - Transformers MCQs

Autotransformer MCQs : This section focuses on the "Autotransformer" in 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

An autotransformer is an electrical transformer with?

A. four winding
B. three winding
C. two winding
D. one winding

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Question 2

The autotransformer winding has at least ________ taps where electrical connections are made.

A. 1
B. 2
C. 3
D. 4

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Question 3

Advantages of autotransformers include ?

A. lower leakage reactance
B. lower losses
C. lower excitation current
D. All of the above

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Question 4

An autotransformer has a single winding with two end terminals and one or more terminals at intermediate tap points

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 5

A ________ transformer provides a path for current that is common to all three phases

A. step-up
B. zig-zag
C. step-down
D. variable auto transformers

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Question 6

Autotransformers are particularly economical when _________

A. Voltage ratio is very high
B. Voltage ratio is less than 2
C. Voltage ratio is higher than 2 in smaller range
D. Can be used anywhere

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Question 7

Two-winding transformer of a given VA rating if connected as an autotransformer can handle ___________

A. Lower VA
B. Same VA
C. Higher VA
D. Can not say

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Question 8

What are the modes in which power can be transferred in an autotransformer?

A. Conduction
B. Induction
C. Conduction and Induction
D. Can not say

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Question 9

For a 20kVA transformer with turn ratio 0.4 what amount of total power is transferred conductively?

A. 4 KVA
B. 8 KVA
C. 12 KVA
D. 16 KVA

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Question 10

In Autotransformer, The primary voltage is applied across two of the terminals.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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