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:-

1, 3 and 4.

1, 2 and 3.

2 and 4.

2, 3 and 4.

1, 3 and 4.

1, 2 and 3.

2 and 4.

2, 3 and 4.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Direct-on-line (DOL) starters are not suitable for starting large DC motors, because

the motor may run away.

the motor may not start.

the starting current will be enormously high.

the starting torque becomes low.

the motor may run away.

the motor may not start.

the starting current will be enormously high.

the starting torque becomes low.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

All of these

maximum

minimum

zero

All of these

maximum

minimum

zero

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The rotor of a 3 - ÃŽÂ¦ wound induction motor is provided with

heavy short-circuited end rings.

heavy copper or aluminium bars placed in rotor slots.

three phase winding.

single phase winding.

heavy short-circuited end rings.

heavy copper or aluminium bars placed in rotor slots.

three phase winding.

single phase winding.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor

Decreases.

Remains unchanged.

Increases.

Oscillates around the rated speed.

Decreases.

Remains unchanged.

Increases.

Oscillates around the rated speed.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The speed of a DC series motor is

Proportional to the armature current.

Inversely proportional to the armature current.

Proportional to field current.

Proportional to the square of the armature current.

Proportional to the armature current.

Inversely proportional to the armature current.

Proportional to field current.

Proportional to the square of the armature current.

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 Direct-on-line (DOL) starters are not suitable for starting large DC motors, because

Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

Electrical Machines The rotor of a 3 - ÃŽÂ¦ wound induction motor is provided with

Electrical Machines A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor

Electrical Machines The speed of a DC series motor is

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
Direct-on-line (DOL) starters are not suitable for starting large DC motors, because

Electrical Machines
If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is

Electrical Machines
The rotor of a 3 - ÃŽÂ¦ wound induction motor is provided with

Electrical Machines
A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor

Electrical Machines
The speed of a DC series motor is