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.Management Sciences
Category: Electric Traction
Suri transmission is_________________?
A. electrical-pneumatic
B. mechanical-electrical
C. hydro-mechanical
D. hydro-pneumatic
Battery operated trucks are used in________________?
A. steel mills
B. power stations
C. narrow gauge traction
D. factories for material transportation
The value of co-efficient of adhesion will be high when rails are_________________?
A. greased
B. wet
C. sprayed with oil
D. cleaned with sand
The horsepower of steam locomotives is______________?
A. up to 1500
B. 1500 to 2000
C. 2000 to 3000
D. 3000 to 4000
________________ frequency is not common in low frequency traction system?
A. 40 Hz
B. 25 Hz
C. 16 Hz
D. non of these
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
In case of locomotives the tractive power is provided by______________?
A. single cylinder double acting steam engine
B. double cylinder, single acting steam engine
C. double cylinder, double acting steam engine
D. single stage steam turbine
The air resistance to the movement of the train is proportional to_____________?
A. speed
B. (speed)
C. (speed)
D. 1/speed
Locomotive having monomotor bogies________________?
A. has better coefficient of adhesion
B. are suited both for passanger as well as freight service
C. has better riding qualities due to the reduction of lateral forces
D. has all above qualities
Energy consumption in propelling the train is required for which of the following?
A. Work against the resistance to motion
B. Work against gravity while moving up the gradient
C. Acceleration
D. All of the above
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