A shaded pole motor can be used for
any of the above
circulators
hair dryers
toys
any of the above
For which of the applications a reluctance motor is preferred ?
Signalling and timing devices
Refrigerators
Electric shavers
Lifts and hoists
Signalling and timing devices
In a shaded pole single-phase motor the revolving field is produced by the use of
resistor
shading coils
inductor
capacitor
shading coils
A centrifugal switch is used to dis- connect ‘starting winding when motor has
picked up about 50 to 70 per cent of rated speed
run for about 1 minute
run for about 5 minutes
picked up about 10 to 25 per cent of rated speed
picked up about 50 to 70 per cent of rated speed
If a particular application needs high speed and high starting torque then which of the following motor will be preferred ?
Capacitor start and run motor
Capacitor start motor
Shaded pole type motor
Universal motor
Universal motor
The value of starting capacitor of a fractional horse power motor will be
100 uF
200 uF
300 uF
400 uF
300 uF
In repulsion motor direction of rotation of motor
is the same as that of brush shift
none of the above
is independent of brush shift
is opposite to that of brush shift
is the same as that of brush shift
The motor used on small lathes is usually
single-phase capacitor run motor
D.C. shunt motor
universal motor
3-phase synchronous motor
single-phase capacitor run motor
Single phase induction motor usually operates on
unity power factor
0.6 power factor lagging
0.8 power factor lagging
0.8 power factor leading
0.6 power factor lagging
In split-phase motor auxiliary winding is of
thin wire placed at the top of the slots
thick wire placed at the bottom of the slots
thick wire placed at the top of the slots
thin wire placed at the bottom of the slots
thin wire placed at the top of the slots
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
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