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Electric Traction

Electric Traction
Specific energy consumption is least in _______ service.

Main line
Urban
None of the listed here
Suburban

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Electric Traction
Which of the following drives is suitable for mines where explosive gas exists?

All of the listed here
Battery locomotive
Diesel engine
Steam engine

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Electric Traction
When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when

Degree of curvature is more
Both of the listed here
Wheel base of axles is more
None of the listed here

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Electric Traction
Series motor is not suited for traction duty due to which of the following account?

Commutating property at heavy load
Current surges after temporary switching off supply
Less current drain on the heavy load torque
Self relieving property

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Electric Traction
In tram ways which of the following motors is used?

A.C. three phase motor
D.C. series motor
D.C. shunt motor
AC. single phase capacitor start motor

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Electric Traction
Overhead lines for power supply to tram cars are at a minimum height of

3 m
6 m
15 m
10 m

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