MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Machine A has 60 phase spread and machine B has 120 phase spread. Both the machines have uniformly distributed winding. The ratio of distribution factors of machine A to machine B is ____________ |
| A. | 0.866 |
| B. | 1.1 |
| C. | 1.55 |
| D. | 1.155 |
| Answer» D. 1.155 | |
| 2. |
Which among the given harmonics are called belt harmonics? |
| A. | 5, 7, 11, 13 |
| B. | 3, 6, 9, 12 |
| C. | 5, 6, 11, 12 |
| D. | 7, 11, 13, 15 |
| Answer» B. 3, 6, 9, 12 | |
| 3. |
For eliminating nth harmonic from the EMF generated in the phase of a 3-phase alternator, the chording angle should be ______________ |
| A. | n full pitch |
| B. | (1/n) full pitch |
| C. | (2/n) full pitch |
| D. | (3/n) full pitch |
| Answer» B. (1/n) full pitch | |
| 4. |
A 6-pole alternator with 36 slots carries a 2-phase distributed winding. Each coil is short pitched by one slot. The winding factor is given by _____________ |
| A. | cot15 /3 2 |
| B. | cot15 /4 |
| C. | cot15 /2 2 |
| D. | cot15 /4 |
| Answer» B. cot15 /4 | |