MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
Calculate mark to space ratio if the system is on for 17 sec and time period is 30 sec. |
| A. | 1.307 |
| B. | 1.457 |
| C. | 1.478 |
| D. | 1.146 |
| Answer» B. 1.457 | |
| 2. |
The slope of the V-I curve is 78°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line. |
| A. | 4.732 Ω |
| B. | 4.608 Ω |
| C. | 4.543 Ω |
| D. | 4.648 Ω |
| Answer» B. 4.608 Ω | |
| 3. |
Which of the following device should be used as a switch in a low power switched mode power supply (SMPS)? |
| A. | GTO |
| B. | BJT |
| C. | MOSFET |
| D. | TRIAC |
| Answer» D. TRIAC | |
| 4. |
SCR is uni-directional in nature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which of the following device is NOT suitable for parallel operation? |
| A. | MOSFET |
| B. | BJT |
| C. | IGBT |
| D. | TRIAC |
| Answer» C. IGBT | |
| 6. |
The conduction loss versus device current characteristic of a power MOSFET is best approximated by a ________ |
| A. | Straight line |
| B. | Rectangular hyperbola |
| C. | Parabola |
| D. | Exponential decaying functions |
| Answer» D. Exponential decaying functions | |
| 7. |
A DC chopper feeds an RLE load. If the value of E is increased by 20%, the current ripple ________ |
| A. | increases by 20% |
| B. | decreases by 20% |
| C. | increases only 20% |
| D. | remains the same |
| Answer» E. | |
| 8. |
A chopper behaves as a __________ |
| A. | DC equivalent of AC switching device |
| B. | DC equivalent of AC transformer |
| C. | DC equivalent of AC relay |
| D. | AC equivalent of circuit breaker |
| Answer» C. DC equivalent of AC relay | |
| 9. |
In DC chopper, the waveform for input and output voltages is respectively __________ |
| A. | Discontinuous and Continuous |
| B. | Continuous and Discontinuous |
| C. | Both continuous |
| D. | Both discontinuous |
| Answer» C. Both continuous | |