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

24.11 kW.

26.21 kW.

23.06 kW.

25 kW.

24.11 kW.

26.21 kW.

23.06 kW.

25 kW.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Fufuraldehyde analysis is done to determine the

condition of cork gaskets used in transformer.

condition of oil in transformer.

condition of lamination on CRGO steel sheet.

condition of paper insulation in transformer.

condition of cork gaskets used in transformer.

condition of oil in transformer.

condition of lamination on CRGO steel sheet.

condition of paper insulation in transformer.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The main purpose of providing tertiary winding in a three phase transformer is

None of these

to carry extra load.

to suppress harmonic and unbalance in voltage.

to interconnect three voltage systems.

None of these

to carry extra load.

to suppress harmonic and unbalance in voltage.

to interconnect three voltage systems.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection.

50 V.

399 V.

230.2 V.

100 V.

50 V.

399 V.

230.2 V.

100 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively?

shaded, shaded

shaded, unshaded

unshaded, shaded

unshaded, unshaded

shaded, shaded

shaded, unshaded

unshaded, shaded

unshaded, unshaded

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Flashing of DC generator means

increasing flux density by providing extra ampere-turns in field.

None of these

creation of residual magnetism by a DC source.

neutralization of residual magnetism.

increasing flux density by providing extra ampere-turns in field.

None of these

creation of residual magnetism by a DC source.

neutralization of residual magnetism.

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 Fufuraldehyde analysis is done to determine the

Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is

Electrical Machines A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection.

Electrical Machines In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively?

Electrical Machines Flashing of DC generator means

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
Fufuraldehyde analysis is done to determine the

Electrical Machines
The main purpose of providing tertiary winding in a three phase transformer is

Electrical Machines
A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection.

Electrical Machines
In shaded pole induction motors, the flux moves from ------------- region to ----------------- region respectively?

Electrical Machines
Flashing of DC generator means