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Single Phase Motors
A motor gets overheated due to
Overloads
All of the listed here
Worn bearings
Dry bearings
Overloads
All of the listed here
Worn bearings
Dry bearings
Answer
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Related Question
Single Phase Motors
For the same rating, the size of a single phase induction motor is about _______ that of the corresponding 3-phase induction motor.
The same as
1.5 times
3 times
0.33 times
The same as
1.5 times
3 times
0.33 times
Answer
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Single Phase Motors
The capacitor start, capacitor run motor has _______
No centrifugal switch
Low power factor
Noisy operation
Low efficiency
No centrifugal switch
Low power factor
Noisy operation
Low efficiency
Answer
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Single Phase Motors
If a single phase induction motor runs slower than normal, the most likely defect is
worn bearings
short-circuit in the winding
None of these
open-circuit in the winding
worn bearings
short-circuit in the winding
None of these
open-circuit in the winding
Answer
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Single Phase Motors
Which of the following applications would need the smallest size of motor?
Electric clock
Table fan
Sewing machine
Domestic mixi
Electric clock
Table fan
Sewing machine
Domestic mixi
Answer
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Single Phase Motors
A 50 Hz, 4- pole single phase induction motor will have a synchronous speed of ______
None of the listed here
1200 rpm
750 rpm
1500 rpm
None of the listed here
1200 rpm
750 rpm
1500 rpm
Answer
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