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WorksheetsMachines 2 - Three Phase induction Machine
Total questions: 10
Worksheet time: 5mins
The principle of operation of three phase induction motor is similar to........
Synchronous motor
Repulsion start induction motor
transformer with a shorted secondary
capacitor start induction run motor.
The power factor of a squirrel cage induction motor is
low at light loads only
low at heavy loads only
low at light and heavy loads
high at light loads only
Slip of IM can be written as
Stator Cu loss/Rotor output
Rotor Power/Rotor input
Rotor Cu loss/Rotor input
Rotor Cu loss/Rotor output
If slip value is less than 1, it means, the machine is
motoring
Braking
Generating
Transferring
No load test is used to obtain
Slip
Cu loss
core loss
efficiency
Short circuit test is used to obtain
core loss
Cu loss
Slip
Efficiency
The frequency of Indian power grid went upto ......on 5th April between 9 pm and 9:09 pm as part of Corona Unity Call by PM.
49.45 Hz
50.25 Hz
52.5 Hz
51.9 Hz
In Double cage Squirrel cage motor, the outer cage has
less resistance
more resistance
zero resistance
infinite resistance
Circle diagram is used to find
Slip
Efficiency
Loss
All of the above
Three phase Squirrel cage induction motor is
Not a a self starting
Self starting
