MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
For a 100 hp 250 V, compound dc motor with compensating winding has a field current of 5 A to produce a voltage of 250 V at 1200 rpm. What will be the shunt field current of this machine at no load? |
| A. | 5 A |
| B. | 5.6 A |
| C. | 4 A |
| D. | 0 A |
| Answer» B. 5.6 A | |
| 2. |
A student is given a differential compound motor and he has been asked to make it start. How will he try? |
| A. | By shorting series field at start |
| B. | To run as shunt motor at start |
| C. | By making rated current at start |
| D. | All of the mentioned |
| Answer» E. | |
| 3. |
It is impossible to start a differential compounded dc motor. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The speed torque of the differential compound dc motor is shown below. What conclusions can be made? |
| A. | This is an unstable machine |
| B. | There is regenerative increment in the speed |
| C. | This is impractical to be used |
| D. | All of the mentioned |
| Answer» E. | |
| 5. |
Choose the best option which identifies about the below characteristics. |
| A. | (1)series motor (2) Cumulative compound motor (3) Shunt motor |
| B. | (1)Cumulative compound motor (2) series motor (3) Shunt motor |
| C. | (1)Cumulative compound motor (2) Shunt motor (3) series motor |
| D. | (1)Shunt motor (2) series motor (3) Cumulative compound motor |
| Answer» B. (1)Cumulative compound motor (2) series motor (3) Shunt motor | |
| 6. |
Identify the speed torque characteristics of a dc series motor. |
| A. | a) |
| B. | b) |
| C. | c) |
| D. | d) |
| Answer» B. b) | |