DC series motors are best suited for traction work because

DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque

Torque and speed are inversely proportional to the square of the armature current

Its torque is proportional to the square of the armature current and speed is directional proporational to torque

Torque and speed are proportional to the square of the armature current

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque

Torque and speed are inversely proportional to the square of the armature current

Its torque is proportional to the square of the armature current and speed is directional proporational to torque

Torque and speed are proportional to the square of the armature current

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Capacitor start motor

Split phase motor

Universal motor

Capacitor start capacitor run motor

Capacitor start motor

Split phase motor

Universal motor

Capacitor start capacitor run motor

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Eliminate hunting and provide adequate starting torque

Reduce winding losses

Reduce bearing friction

Eliminate losses on account of fair friction

Eliminate hunting and provide adequate starting torque

Reduce winding losses

Reduce bearing friction

Eliminate losses on account of fair friction

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DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

36 H

13 H

6 H

2.2 H

36 H

13 H

6 H

2.2 H

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DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

AC

Positive cycle of sine wave

Negative cycle of sine wave

DC

AC

Positive cycle of sine wave

Negative cycle of sine wave

DC

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DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are inverse of each other

Have no inter relation

Are transpose of each other

Are the same

Are inverse of each other

Have no inter relation

Are transpose of each other

Are the same

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) DC series motors are best suited for traction work because

DGVCL Exam Paper (11-12-2011) The motor used in celling fans is

DGVCL Exam Paper (11-12-2011) The purpose of embedding the damper winding in the pole face of a synchronous motor is to

DGVCL Exam Paper (11-12-2011) The mutual inductance between two unity coupled coils of 9 H and 4 H is

DGVCL Exam Paper (11-12-2011) All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

DGVCL Exam Paper (11-12-2011) Ybus used in power flow studies and Zbus used in short circuit studies

DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because

DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies