Which of the following is an advantage of electric traction over other methods of traction?

Which of the following is the disadvantage of electric traction over other systems of traction?

A

Corrosion problems in the underground pipe work

B

Short time power failure interrupts traffic for hours

C

High capital outlay in fixed installations beside route limitation

D

Interference with communication lines

_______ was the first city in India to adopt electric traction.

A

Delhi

B

Madras (Chennai)

C

Calcutta (kolkata)

D

Bombay (Mumbai)

In a simple circuit, one end of a conducting wire is attached to an electric cell, and the other end to an electric outlet

A

battery

B

faucet

C

socket

D

appliance

Which of the following motors is preferred for traction work?

A

Universal motor

B

D.C. series motor

C

Synchronous motor

D

Three-phase induction motor

Series motor is not suited for traction duty due to which of the following account?

A

Less current drain on the heavy load torque

B

Current surges after temporary switching off supply

C

Self relieving property

D

Commutating property at heavy load

Which one of the following surfaces will give highest coefficient of traction while using crawler track tractors?

A

Ice

B

Concrete

C

Loose sand

D

Earth

In which stages of labor "control cord traction" is needed?

A

First stage

B

Second stage

C

Third stage

D

Fourth stage

Skids occur when the brakes are applied so hard that the front or rear wheels lose traction are called as

A

Cornering

B

BLowout

C

Power

D

Braking

Why are the D.C. motors preferred for traction applications?

A

Torque and speed are inversely proportional to armature current

B

Torque is proportional to armature current

C

Torque is proportional to square root of armature current

D

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

Main traction systems used in India are, those using

A

Electric locomotives

B

Diesel engine locomotives

C

Steam engine locomotives

D

All of the above

Which of the following is an advantage of electric traction over other methods of traction?

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