| 1. | Which of the following applications make use of a universal motor ? | |
|
Portable tools
|
||
|
Lathe machines
|
||
|
Oil expeller
|
||
|
Floor polishing machine
|
||
View Answer
Discuss in Forum
Report Question| 2. | The speed with which magnetic field of an induction motor rotates is called ? | |
|
shaft speed
|
||
|
effective speed
|
||
|
synchronous speed
|
||
|
slip speed
|
||
| 3. | The speed/load characteristics of a universal motor is same as that of ? | |
|
A.C. Motor
|
||
|
shunt motor
|
||
|
series motor
|
||
|
none of the above
|
||
| 4. | A repulsion motor is equipped with ? | |
|
slip rings
|
||
|
commutator
|
||
|
both (a) and (b)
|
||
|
none of the above
|
||
| 5. | Which motor has unsymmetrical rotor ? | |
|
Shaded-pole motor
|
||
|
Split-phase motor
|
||
|
Reluctance motor
|
||
|
Universal motor
|
||
| 6. | In a shaded pole motor, the direction of rotation is from ? | |
|
shaded pole to main pole
|
||
|
main pole to shaded pole
|
||
|
depends on supply line polarity
|
||
|
none of the above
|
||
| 7. | A shaded pole motor does not possess ? | |
|
centrifugal switch
|
||
|
capacitor
|
||
|
commutator
|
||
|
all of the above
|
||
| 8. | As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for ? | |
|
fans
|
||
|
blowers
|
||
|
sound equipment
|
||
|
mixer grinders
|
||
| 9. | A hysteresis motor works on the principle of ? | |
|
hysteresis loss
|
||
|
magnetisation of rotor
|
||
|
eddy current loss
|
||
|
electromagnetic induction
|
||
| 10. | Which of the following motors can be used for unity power factor ? | |
|
Capacitor run motor
|
||
|
Shaded pole motor
|
||
|
Hysteresis motor
|
||
|
Schrage motor
|
||