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.Management Sciences
Category: Electric Traction
The friction at the track is proportional to________________?
0
A. 1/speed
B. l/(speed)2
C. speed
D. none of the above
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
For 25 kV single phase system power supply frequency is_______________?
A. 60 Hz
B. 50 Hz
C. 25 Hz
D. 16 Hz
The overall efficiency of steam locomotive is around_____________?
A. 5 to 10 percent
B. 15 to 20 percent
C. 25 to 35 percent
D. 35 to 45 percent
In case of steam engines the steam pressure is_______________?
A. 1 to 4 kgf/cm2
B. 5 to 8 kgf/cm2
C. 10 to 15 kgf/cm2
D. 25 to 35 kgf/cm2
_______________method can bring the locomotive to dead stop?
A. Plugging braking
B. Rheostatic braking
C. Regenerative braking
D. None of the above
Main traction systems used in India are, those using______________?
A. electric locomotives
B. diesel engine locomotives
C. steam engine locomotives
D. diesel electric locomotives
E. all of the above
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
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