MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Convert 50 into Celsius. |
| A. | 20 |
| B. | 10 |
| C. | 30 |
| D. | 40 |
| Answer» B. 10 | |
| 2. |
Convert 20 into Fahrenheit. |
| A. | 68 |
| B. | 58 |
| C. | 78 |
| D. | 48 |
| Answer» B. 58 | |
| 3. |
Calculate the heat absorbed by a 3 resistor when 6 V is applied across it. |
| A. | 12 W |
| B. | 10 W |
| C. | 8 W |
| D. | 11 W |
| Answer» B. 10 W | |
| 4. |
Calculate the quality factor for the R-C circuit connected in the cooling system if R=1 and C=10 F. |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» B. 0.2 | |
| 5. |
Calculate the steady state temperature value for T(t)=1.5(1-e-17t). |
| A. | 1.5 |
| B. | 4.8 |
| C. | 3.9 |
| D. | 2.4 |
| Answer» B. 4.8 | |
| 6. |
A circuit consists of two 7 F capacitors connected in series and 12 H inductor. Determine the order of the circuit. |
| A. | 1 |
| B. | 2 |
| C. | 0 |
| D. | 3 |
| Answer» C. 0 | |
| 7. |
Insufficient rating of the machine can damage the windings. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
What is heating time constant of the machine? |
| A. | The ratio of the thermal capacity and heat dissipation constant value |
| B. | The ratio of the thermal capacity and heat dissipation constant value |
| C. | The ratio of the thermal capacity and heat dissipation constant value |
| D. | The ratio of the thermal capacity and heat dissipation constant value |
| Answer» B. The ratio of the thermal capacity and heat dissipation constant value | |
| 9. |
Inadequate rating of the equipment can ___________ |
| A. | Increase the speed |
| B. | Decrease the speed |
| C. | Damage the winding |
| D. | Increase the efficiency |
| Answer» D. Increase the efficiency | |
| 10. |
Calculate the heating time constant of the machine if the thermal capacity (c) of the machine is 24 watts/ and heat dissipation constant value (D) is 3 watts/ . |
| A. | 8 sec |
| B. | 7 sec |
| C. | 6 sec |
| D. | 9 sec |
| Answer» B. 7 sec | |
| 11. |
Cooling air travels 10 m distance in 5 sec from point A to point B. Calculate the velocity of the cooling air. |
| A. | 2 m/s |
| B. | 4 m/s |
| C. | 6 m/s |
| D. | 10 m/s |
| Answer» B. 4 m/s | |
| 12. |
Which of the following are the classes of insulating material in electrical machines? |
| A. | , A, E, F, H, C |
| B. | , E, B, F, H, C |
| C. | A, E, B, F, H, C |
| D. | , A, E, F, C |
| Answer» B. , E, B, F, H, C | |
| 13. |
Iron losses occur in the machine are variable losses. |
| A. | True |
| B. | False |
| Answer» C. | |