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, 2 and 3.

2, 3 and 4.

1, 3 and 4.

2 and 4.

1, 2 and 3.

2, 3 and 4.

1, 3 and 4.

2 and 4.

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Electrical Machines
Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?

Dummy coils.

Equalizer rings.

Commutator.

Eye bolt.

Dummy coils.

Equalizer rings.

Commutator.

Eye bolt.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is

2.2 ohms.

1.9 ohms.

5.7 ohms.

6 ohms.

2.2 ohms.

1.9 ohms.

5.7 ohms.

6 ohms.

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Electrical Machines
A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be

about 2 V.

zero.

220 V.

about 50 V.

about 2 V.

zero.

220 V.

about 50 V.

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Electrical Machines
The armature of DC machine is made of silicon steel lamination to

increase the permeability.

reduce hysteresis loss only.

reduce both eddy current and hysteresis loss.

reduce eddy current loss only.

increase the permeability.

reduce hysteresis loss only.

reduce both eddy current and hysteresis loss.

reduce eddy current loss only.

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Electrical Machines
Which of the following motor is suitable for frequent starting and stoppings?

Capacitor start capacitor run motor

All of these

Resistance split phase motor

Capacitor start motor

Capacitor start capacitor run motor

All of these

Resistance split phase motor

Capacitor start motor

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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 Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?

Electrical Machines A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is

Electrical Machines A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be

Electrical Machines The armature of DC machine is made of silicon steel lamination to

Electrical Machines Which of the following motor is suitable for frequent starting and stoppings?

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
Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator?

Electrical Machines
A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is

Electrical Machines
A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be

Electrical Machines
The armature of DC machine is made of silicon steel lamination to

Electrical Machines
Which of the following motor is suitable for frequent starting and stoppings?