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

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

A

Faster acceleration

B

No pollution problems

C

Better braking action

D

All of the above

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

The goal of microdata is to create a unified way to define the data in a way any web crawler or reader implementation can read it.

A

True

B

False

The rated loads of lifting cranes, as percentage of tipping load at specified radius, for crawler-mounted and pneumatic tyre-mounted machines would be respectively

A

80 and 90

B

90 and 80

C

85 and 75

D

75 and 83

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

For the purpose of track maintenance, the number of turn out equivalent to one track km are

A

1

B

2

C

5

D

10

Which of the following surfaces will give highest rolling resistance for a rubber tyred vehicle?

A

Concrete

B

Loose sand

C

Asphalt

D

Firm earth

What is the position of the Indian Railway under one management are also credited with having a multi gauge and multi traction system?

A

First

B

Second

C

Third

D

Fourth

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?

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