A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

Electrical Machines
A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

23.06 kW.

25 kW.

24.11 kW.

26.21 kW.

23.06 kW.

25 kW.

24.11 kW.

26.21 kW.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by

fixing the brush axis inline with the pole axis.

compensating winding and commutating poles.

increasing field excitation.

shifting the brush axis from GNA to MNA.

fixing the brush axis inline with the pole axis.

compensating winding and commutating poles.

increasing field excitation.

shifting the brush axis from GNA to MNA.

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

200 MW and 400MW

generator 2 gets over load

None of these

generator 1 gets over load

200 MW and 400MW

generator 2 gets over load

None of these

generator 1 gets over load

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Electrical Machines
The shaft of induction motor may be unbalanced due to

overheating of winding.

poor lubrication.

overload.

uneven air gap.

overheating of winding.

poor lubrication.

overload.

uneven air gap.

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Electrical Machines
Value of specific electric loading of Induction motor is in the range of

400 - 4000 ampere conductor / metre.

5000 - 45000 ampere conductor / metre.

40 - 400 ampere conductor / metre.

30000 - 100000 ampere conductor / metre.

400 - 4000 ampere conductor / metre.

5000 - 45000 ampere conductor / metre.

40 - 400 ampere conductor / metre.

30000 - 100000 ampere conductor / metre.

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Electrical Machines
Voltage across the open circuited field termninals of a synchorous machine under slip test is

AC of supply frequency.

DC.

A modulated supply frequency AC voltage with slip frequency envelop.

DC of slip frequency.

AC of supply frequency.

DC.

A modulated supply frequency AC voltage with slip frequency envelop.

DC of slip frequency.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

Electrical Machines To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by

Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines The shaft of induction motor may be unbalanced due to

Electrical Machines Value of specific electric loading of Induction motor is in the range of

Electrical Machines Voltage across the open circuited field termninals of a synchorous machine under slip test is

Electrical Machines
A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

Electrical Machines
To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines
The shaft of induction motor may be unbalanced due to

Electrical Machines
Value of specific electric loading of Induction motor is in the range of

Electrical Machines
Voltage across the open circuited field termninals of a synchorous machine under slip test is