MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which type of load is offered by cranes and hoists ? |
| A. | Gradually varying load |
| B. | Non-reversing, no-load start |
| C. | Reversing, light start |
| D. | Reversing, heavy start |
| Answer» E. | |
| 2. |
Which of the following motors has two separate windings on the motor ? |
| A. | Repulsion motor |
| B. | Repulsion induction motor |
| C. | Repulsion start induction run motor |
| D. | None of the above |
| Answer» C. Repulsion start induction run motor | |
| 3. |
In a split phase motor, the running winding should have? |
| A. | High resistance and low inductance |
| B. | Low resistance and high inductance |
| C. | High resistance as well as high inductance |
| D. | Low resistance as well as low inductiance |
| Answer» C. High resistance as well as high inductance | |
| 4. |
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C____________? |
| A. | Shunt motor |
| B. | Series motor |
| C. | Compound motor |
| D. | Separately excited motor |
| Answer» D. Separately excited motor | |
| 5. |
Which of the following applications always have some load whenever switched on ? |
| A. | Vacuum cleaners |
| B. | Fan motors |
| C. | Pistol drills |
| D. | All of the above |
| Answer» D. All of the above | |
| 6. |
Which of the following motors can be run on AC. as well as D.C. supply ? |
| A. | Universal motor |
| B. | Repulsion motor |
| C. | Synchronous motor |
| D. | Reluctance motor |
| Answer» B. Repulsion motor | |
| 7. |
Single phase induction motor usually operates on__________? |
| A. | 0.6 power factor lagging |
| B. | 0.8 power factor lagging |
| C. | 0.8 power factor leading |
| D. | Unity power factor |
| Answer» B. 0.8 power factor lagging | |
| 8. |
Speed control of a universal motor is achieved by__________? |
| A. | Varying field flux with tapped field windings |
| B. | Connecting rheostat in series |
| C. | Applying variable voltage by means of silicon controlled rectifier |
| D. | Applying variable voltage by means of variable auto-transformer |
| Answer» F. | |
| 9. |
Which motor is normally free from mechanical and magnetic vibrations ? |
| A. | Split phase motor |
| B. | Universal motor |
| C. | Hysteresis motor |
| D. | Shaded pole motor |
| Answer» D. Shaded pole motor | |
| 10. |
Which of the following motors can be used for unity power factor ? |
| A. | Capacitor run motor |
| B. | Shaded pole motor |
| C. | Hysteresis motor |
| D. | Schrage motor |
| Answer» E. | |
| 11. |
In which single-phase motor, the rotor has no teeth or winding ? |
| A. | Split phase motor |
| B. | Reluctance motor |
| C. | Hysteresis motor |
| D. | Universal motor |
| Answer» D. Universal motor | |
| 12. |
Which of the following single-phase motors has relatively poor starting torque ? |
| A. | Universal motor |
| B. | Repulsion motor |
| C. | Capacitor motor |
| D. | All single phase motors have zero starting torque |
| Answer» D. All single phase motors have zero starting torque | |
| 13. |
Which of the following statements regarding two value capacitor motor is incorrect ? |
| A. | It is a reversing motor |
| B. | It is preferred to permanent-split single-value capacitor motor where frequent reversals are required |
| C. | It has low starting as well as rushing currents |
| D. | It has high starting torque |
| Answer» C. It has low starting as well as rushing currents | |
| 14. |
Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a___________? |
| A. | Magnetic relay |
| B. | Thermal relay |
| C. | Centrifugal switch |
| D. | None of the above |
| Answer» B. Thermal relay | |
| 15. |
Which of the following motor will give the highest starting torque ? |
| A. | D.C. shunt motor |
| B. | Schrage motor |
| C. | Repulsion start and induction run motor |
| D. | Universal motor |
| Answer» C. Repulsion start and induction run motor | |
| 16. |
Short-circuiter is used in_____________? |
| A. | Repulsion induction motor |
| B. | Repulsion motor |
| C. | Repulsion start induction run motor |
| D. | None of the above |
| Answer» D. None of the above | |
| 17. |
Which of the following motors is inherently self starting ? |
| A. | Split motor |
| B. | Shaded-pole motor |
| C. | Reluctance motor |
| D. | None of these |
| Answer» C. Reluctance motor | |
| 18. |
Which of the following motors is used in mixies ? |
| A. | Repulsion motor |
| B. | Reluctance motor |
| C. | Hysteresis motor |
| D. | Universal motor |
| Answer» E. | |
| 19. |
A centrifugal switch is used to dis- connect starting winding when motor has___________? |
| A. | Run for about 1 minute |
| B. | Run for about 5 minutes |
| C. | Picked up about 50 to 70 per cent of rated speed |
| D. | Picked up about 10 to 25 per cent of rated speed |
| Answer» D. Picked up about 10 to 25 per cent of rated speed | |
| 20. |
Which of the following motors is used for unity power factor ? |
| A. | Hysteresis motor |
| B. | Schrage motor |
| C. | Universal motor |
| D. | Reluctance motor |
| Answer» C. Universal motor | |