Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

Electrical Machines
Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

2 and 4.

1, 3 and 4.

1, 2 and 3.

2, 3 and 4.

2 and 4.

1, 3 and 4.

1, 2 and 3.

2, 3 and 4.

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Electrical Machines
When a synchronous motor is running at synchronous speed, the damper winding produces

eddy current torque.

damping torqe.

both 1 and 2.

no torque.

eddy current torque.

damping torqe.

both 1 and 2.

no torque.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
When a DC cummulative compound wound motor is loaded

Torque and speed both increase.

Both torque and speed decrease.

Torque decrease and speed increases.

Torque increase and speed decrease.

Torque and speed both increase.

Both torque and speed decrease.

Torque decrease and speed increases.

Torque increase and speed decrease.

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Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

negative sequence currents are generated.

the damper bars develop synchronous motor torque.

the damper bars develop induction motor torque.

the damper bars develop induction generator torque.

negative sequence currents are generated.

the damper bars develop synchronous motor torque.

the damper bars develop induction motor torque.

the damper bars develop induction generator torque.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to

0.25 p.u

0.125 p.u

0.75 p.u

0.5 p.u

0.25 p.u

0.125 p.u

0.75 p.u

0.5 p.u

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a 3 - ÃŽÂ¦ wound rotor induction motor the short circuit gear is used to short circuit the

None of these

rotor at slip rings.

starting resistance in the starter.

stator phases of the motor.

None of these

rotor at slip rings.

starting resistance in the starter.

stator phases of the motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

Electrical Machines When a synchronous motor is running at synchronous speed, the damper winding produces

Electrical Machines When a DC cummulative compound wound motor is loaded

Electrical Machines In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

Electrical Machines A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to

Electrical Machines In a 3 - ÃŽÂ¦ wound rotor induction motor the short circuit gear is used to short circuit the

Electrical Machines
Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

Electrical Machines
When a synchronous motor is running at synchronous speed, the damper winding produces

Electrical Machines
When a DC cummulative compound wound motor is loaded

Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

Electrical Machines
A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to

Electrical Machines
In a 3 - ÃŽÂ¦ wound rotor induction motor the short circuit gear is used to short circuit the