Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

Electrical Machines
Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

1 and 2

2 alone

1 and 3

1, 2 and 3

1 and 2

2 alone

1 and 3

1, 2 and 3

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following represents the commutator pitch?

Number of commutator segments between two successive coils.

Number of conductors spanned by one coil at the back end of the armature.

The distance between the staring of first coil and its next successive coil

Number of conductors spanned by one coil at the front end of the armature.

Number of commutator segments between two successive coils.

Number of conductors spanned by one coil at the back end of the armature.

The distance between the staring of first coil and its next successive coil

Number of conductors spanned by one coil at the front end of the armature.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be

50 W

168.75 W

112.5 W

75 W

50 W

168.75 W

112.5 W

75 W

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In travelling cranes for swing action which motor is preferred?

DC series motor.

AC slip ring IM.

Capacitor type induction motors.

Reluctance motor.

DC series motor.

AC slip ring IM.

Capacitor type induction motors.

Reluctance motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Skewing of cage rotors offers the following advantages

locking tendency is reduced.

less noise.

all of below.

uniform torque.

locking tendency is reduced.

less noise.

all of below.

uniform torque.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Breather is provided in a transformer to

absorb moisture from air entering in transformer.

filter the transformer oil.

absorb moisture of air during breathing.

provide cold air in transformer.

absorb moisture from air entering in transformer.

filter the transformer oil.

absorb moisture of air during breathing.

provide cold air in transformer.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

Electrical Machines Which of the following represents the commutator pitch?

Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be

Electrical Machines In travelling cranes for swing action which motor is preferred?

Electrical Machines Skewing of cage rotors offers the following advantages

Electrical Machines Breather is provided in a transformer to

Electrical Machines
Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

Electrical Machines
Which of the following represents the commutator pitch?

Electrical Machines
A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be

Electrical Machines
In travelling cranes for swing action which motor is preferred?

Electrical Machines
Skewing of cage rotors offers the following advantages

Electrical Machines
Breather is provided in a transformer to