MCQOPTIONS
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MCQOPTIONS
This section includes 14 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 the mass of the solid cylinder having a mass of 4 kgm2 and radius of 4 m & length of 12 m. |
| A. | 64 kgm2 |
| B. | 68 kgm2 |
| C. | 67 kgm2 |
| D. | 69 kgm2 |
| Answer» B. 68 kgm2 | |
| 2. |
Calculate the moment of inertia of the circular hollow disk having a mass of 2 kg and an internal radius of 5 m and an external radius of 10 m. |
| A. | 125 kgm2 |
| B. | 127 kgm2 |
| C. | 122 kgm2 |
| D. | 123 kgm2 |
| Answer» B. 127 kgm2 | |
| 3. |
Lowest order harmonic present in 3-Φ fully controlled rectifier is __________ |
| A. | 5th |
| B. | 7th |
| C. | 3rd |
| D. | 2nd |
| Answer» B. 7th | |
| 4. |
Which harmonic is not present in 3-Φ fully controlled rectifier? |
| A. | 3rd harmonic |
| B. | 5th harmonic |
| C. | 7th harmonic |
| D. | 11th harmonic |
| Answer» B. 5th harmonic | |
| 5. |
Full form of SPWM. |
| A. | Sinusoidal pulse width modulation |
| B. | State per width modulation |
| C. | State pulse width modulation |
| D. | Sinusoidal per width modulation |
| Answer» B. State per width modulation | |
| 6. |
Calculate the compensator rating required for cos(Φ)=.7. |
| A. | 0.71 P.U |
| B. | 0.21 P.U |
| C. | 0.47 P.U |
| D. | 0.12 P.U |
| Answer» B. 0.21 P.U | |
| 7. |
_________ motor operates at low power factor. |
| A. | Capacitor run |
| B. | Capacitor start |
| C. | Shaded pole |
| D. | Reluctance |
| Answer» D. Reluctance | |
| 8. |
Plasticity is the ability of the material to deform without breaking. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Calculate the work done in stretching the wire of volume=22 m3 and the values of stress and strain are 2 N/m2 and 4. |
| A. | 66 J |
| B. | 44 J |
| C. | 22 J |
| D. | 88 J |
| Answer» E. | |
| 10. |
The relationship between Young’s modulus (Y), Bulk modulus (K) and Poisson’s ratio (μ) is _____________ |
| A. | Y=K(1-2μ) |
| B. | Y=3K(1-2μ) |
| C. | Y=5K(1-2μ) |
| D. | Y=4K(1-8μ) |
| Answer» C. Y=5K(1-2μ) | |
| 11. |
Which of the following are the types of Stress? |
| A. | Longitudinal stress, Volume stress, Tangential stress |
| B. | Longitudinal stress, Volume stress |
| C. | Longitudinal stress, Lateral stress, Tangential stress |
| D. | Longitudinal stress, Shear stress |
| Answer» B. Longitudinal stress, Volume stress | |
| 12. |
What is the effect of impurities on elasticity? |
| A. | It will increase |
| B. | Remains the same |
| C. | It will decrease |
| D. | It will slightly increase |
| Answer» E. | |
| 13. |
Calculate the load stress if the value of force is 20 N and the area of cross-section is 2 m2. |
| A. | 10 N/m2 |
| B. | 20 N/m2 |
| C. | 30 N/m2 |
| D. | 40 N/m2 |
| Answer» B. 20 N/m2 | |
| 14. |
Hooke’s law is applicable within the elastic limit. |
| A. | True |
| B. | False |
| Answer» B. False | |