MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Similarity between Hopkinonson’s and field’s test is that _______ |
| A. | both need similar mechanically coupled motor |
| B. | both need similar electrically coupled motor |
| C. | regenerative power |
| D. | negligible power |
| Answer» B. both need similar electrically coupled motor | |
| 2. |
Swineburne’s test is applicable to those machines in which flux is practically _______ |
| A. | constant |
| B. | linear |
| C. | non-linear |
| D. | none of the mentioned |
| Answer» B. linear | |
| 3. |
The efficiency in the swineburne’s test can be found. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Hopkinson’s test is also called regenerative test due to ____________ |
| A. | energy of one machine is used to drive other |
| B. | feedback |
| C. | losses are least |
| D. | extra motor is used |
| Answer» B. feedback | |
| 5. |
In the Hopkinson’s test on two DC machines. Machine A has field current of 1.4A and B has field current of 1.3A. Which machine acts as generator? |
| A. | B |
| B. | A |
| C. | A,B |
| D. | None of the mentioned |
| Answer» C. A,B | |
| 6. |
In the hopkinson’s test on two DC machines. Machine A has field current of 1.4A and B has field current of 1.3A. Which machine acts as motor? |
| A. | B |
| B. | A |
| C. | A, B |
| D. | None of the mentioned |
| Answer» B. A | |
| 7. |
What is the main concern before doing hopkinson’s test for finding efficiency? |
| A. | needs one motor and one generator is that it |
| B. | ignores iron and stray losses |
| C. | needs one motor |
| D. | requires identical shunt machines |
| Answer» E. | |