## _______________watt-hours per tonne km is usually the specific energy consumption for suburban services?

_______________watt-hours per tonne km is usually the specific energy consumption for suburban services?

A. 15—20
B. 50—75
C. 120—150
D. 160—200

## The rate of acceleration on suburban orurban service is in the range_________________?

The rate of acceleration on suburban orurban service is in the range_________________?

A. 0.2 to 0.5 km phps
B. 1.6 to 4.0 km phps
C. 5 to 10 km phps
D. 15 to 25 km phps

## Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

A. Reduced current method
B. Tap changing control of transformer
C. Series parallel operation of motors
D. All of the above

## The braking retardation is usually in the range__________________?

The braking retardation is usually in the range__________________?

A. 0.15 to 0.30 km phps
B. 0.30 to 0.6 km phps
C. 0.6 to 2.4 km phps
D. 3 to 5 km phps
E. 10 to 15 km phps

## The coasting retardation is around_________________?

The coasting retardation is around_________________?

A. 0.16 km phps
B. 1.6 km phps
C. 16 km phps
D. 40 km phps

## If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?

If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?

A. 0.3
B. 0.26
C. 0.225
D. 0.16

## Which of the following happens in Kando system ?

Which of the following happens in Kando system ?

A. Three phase A.C. is converted into D.C.
B. Single phase A.C. is converted into D.C.
C. Single phase supply is converted into three phase system
D. None of the above

## Power for lighting in passanger coach, in a long distance electric train, is provided_________________?

Power for lighting in passanger coach, in a long distance electric train, is provided_________________?

A. directly through overhead electric line
B. through individual generator of bogie and batteries
C. through rails
D. through locomotive

## For which of the following locomotives the maintenance requirements are the least ?

For which of the following locomotives the maintenance requirements are the least ?

A. Steam locomotives
B. Diesel locomotives
C. Electric locomotives
D. Equal in all of the above

## In case of a steam engine an average coal consumption per km is nearly________________?

In case of a steam engine an average coal consumption per km is nearly________________?

A. 150 to 175 kg
B. 100 to 120 kg
C. 60 to 80 kg
D. 28 to 30 kg