A. aluminium
B. cast iron
C. chrome steel
D. copper
Correct Answer: chrome steel ✔
Last Updated: October 04, 2018
Related MCQs
- Which of the following applications always have some load whenever switched on ?
- Torque developed by a single phase induction motor at starting is__________?
- The speed control of universal motor used for sewing machines is by__________?
- The electric motor used in portable drills is__________?
- In a hysteresis motor, the rotor must have__________?
- Locked rotor current of a shaded pole motor is__________?
- Which of the following statements regarding repulsion-start induction motor is incorrect ?
- After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on __________?
- A.C. series motor as compared to D.C. series motor has__________?
- Hysteresis motor is particularly useful for high-quality record players and tape-recorders because__________?
- Which of the following statements regarding single-phase induction motors correct?
- Speed control of a universal motor is achieved by__________?
- Which of the following statements regarding hysteresis motor is in incorrect?
- The starting winding of a single-phase motor is placed in_________?
- The speed of a universal motor is usually reduced by using__________?
- A reluctance motor__________?
- Which motor is normally free from mechanical and magnetic vibrations ?
- As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for__________?
- The direction of rotation of universal motor can be reversed the by reversing the flow of current through__________?
- When a D.C. series motor is connected to A.C. supply, the power factor will be low because of__________?
- In which single-phase motor, the rotor has no teeth or winding ?
- The speed of a universal motor is generally reduced by using_________?
- Which of the following single-phase motors has relatively poor starting torque ?
- Which of the following motors can be used for unity power factor ?
- Which type of load is offered by cranes and hoists ?
- The wattage rating for a ceiling fan motor will be in the range_________?
- The wattage of motor for driving domestic sewing machine will be around__________?
- In case of high speed universal motor which of the following needs more attention?
- The repulsion-start induction-run motor is used because of__________?
- In case of a shaded pole motor the direction of rotation of the motor is__________?
- Which of the following single-phase induction motors is generally used in time phonographs ?
- Which of the following motors has highest starting torque ?
- Which of the following motors can be run on AC. as well as D.C. supply ?
- In A.C. series motor compensating winding is employed to__________?
- In a two value capacitor motor, the capacitor used for running purposes is__________?
- In split-phase motor auxiliary winding is of__________?
- Single phase induction motor usually operates on__________?
- Which of the following motors will operate at high power factor ?
- Which of the following single-phase motors is suitable for timing and control purposes ?
- A schrage motor can run on__________?
- A universal motor can run on__________?
- Which of the following motors is preferred for tape-recorders ?
- A single-phase induction motor is__________?
- For which of the applications a reluctance motor is preferred ?
- The motor used on small lathes is usually_________?
- A hysteresis motor works on the principle of__________?
- Which of the following motor will give the highest starting torque ?
- The power factor of a single-phase induction motor is usually?
- A shaded pole motor can be used for__________?
- In a capacitor start single-phase motor, when capacitor is replaced by a resistance__________?
- Short-circuiter is used in__________?