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
Question 2
The autotransformer winding has at least ________ taps where electrical connections are made.
A. 1
B. 2
C. 3
D. 4
Question 3
Advantages of autotransformers include ?
A. lower leakage reactance
B. lower losses
C. lower excitation current
D. All of the above
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
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
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
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
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
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
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