MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
250V, 15A, 1100 rpm separately excited dc motor with armature resistance (Ra) equal to 2 ohms. Calculate back emf developed in the motor when it operates on half of the full load. (Assume rotational losses are neglected) |
| A. | 210V |
| B. | 240V |
| C. | 230V |
| D. | 235V |
| Answer» E. | |
| 2. |
Force resisting the upward motion of a body on an inclined plane is given by (alpha – the angle of inclination, W- the weight of the body). |
| A. | F = W×sin(alpha) |
| B. | F = W×cosec(alpha) |
| C. | F = W×sec(alpha) |
| D. | F = W×cos(alpha) |
| Answer» B. F = W×cosec(alpha) | |
| 3. |
What is the empirical formula for the tractive force required to overcome curve resistance? (W-the weight of the body, R – radius of curvature) |
| A. | 710×W÷R |
| B. | 700×W÷R |
| C. | 720×W÷R |
| D. | 750×W÷R |
| Answer» C. 720×W÷R | |