_______________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
Electric Traction
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