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Hopkinson Test - DC Machines MCQs

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




Question 1

Hopkinson’s Test is another useful method of testing the efficiency of a DC machine.

A. Yes
B. No
C. Can be true or false
D. Can not say

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Question 2

Hopkinson’s test is also called?

A. regenerative test
B. back to back test
C. heat run test
D. All of the above

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Question 3

Motor Input is equal to?

A. V(I1 - I2)
B. V(I1 / I2)
C. V(I1 + I2)
D. V(I1 * I2)

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Question 4

Which of the following Advantages of Hopkinson’s Test?

A. Efficiency at different loads can be determined
B. Temperature rise and commutation can be observed and maintained in the limit
C. This test requires very small power compared to full-load power of the motor-generator coupled system.
D. All of the above

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Question 5

In Hopkinson Test, two identical shunt machines are required which are coupled both mechanically and electrically in parallel

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

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Question 6

Hopkinson’s test of D.C. machines is conducted at _______________

A. No-load
B. Full-load
C. Part load
D. Overload

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Question 7

What will happen if field current of generator in Hopkinson’s test is increased?

A. Current through motor armature will decrease
B. Current through motor armature will increase
C. Current through motor armature will remain constant
D. Motor armature current cannot be determined

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Question 8

In field’s test generator field and motor field are connected in ______________

A. Not connected
B. Parallel
C. Series
D. Alternatively, series and parallel

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Question 9

Hopkinson’s test is suitable for ______________

A. Small machines only
B. Small and medium machines
C. All machines
D. Only large machines

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Question 10

It is difficult to operate the machines at rated speed

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

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