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Electrical Engineering
Single Phase Induction Motors
Quiz 6
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Q.1
In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to
improve power factor
increase overload capacity
reduce fluctuations in torque
to improve torque
Q.2
Which of the following motor will have relatively higher power factor ?
Capacitor run motor
Shaded pole motor
Capacitor start motor
Split phase motor
Q.3
The range of efficiency for shaded pole motors is
95% to 99%
80% to 90%
50% to 75%
5% to 35%
Q.4
Which of the following motor will give relatively high starting torque ?
Capacitor start motor
Capacitor run motor
Split phase motor
Shaded pole motor
Q.5
The running winding of a single phase motor on testing with Meggar is found to be ground. Most probable location of the ground will be
At the end connections
At the end terminals
Anywhere on the winding inside a slot
At the slot edge where coil enters or comes out of the slot
Q.6
The speed control of universal motor used for sewing machines is by
friction
varying the resistance
tapping the field
centrifugal mechanism
Q.7
As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for
fans
blowers
sound equipment
mixer grinders
Q.8
Which of the following motors can be run on AC. as well as D.C. supply ?
Universal motor
Repulsion motor
Synchronous motor
Reluctance motor
Q.9
Which of the following motors is used in a situation where load increases with speed ?
Induction motor
Three-phase series motor
Schrage motor
Hysteresis motor
0 h : 0 m : 1 s
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