Electrical Engineering MCQs

Page No. 46

Overhead lines for power supply to tramcars are at a minimum height of______________?


a3 m

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b6 m

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c10 m

✓


d15 m

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View Answer 10 m

Energy consumption in propelling the train is required for which of the following?


aWork against the resistance to motion

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bWork against gravity while moving up the gradient

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cAcceleration

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dAll of the above

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View Answer All of the above

An ideal traction system should have_______________?


aeasy speed control

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bhigh starting tractive effort

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cequipment capable of with standing large temporary loads

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d all of the above

✓


View Answer all of the above

When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when_______________?


awheel base of axles is more

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bdegree of curvature is more

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c both A. and B.

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dnone of the above

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View Answer both A. and B.

have maximum unbalanced forces_______________?


aDiesel shunters

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bSteam locomotives

✓


cElectric locomotives

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dDiesel locomotives

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View Answer Steam locomotives

In case of _________________ free running and coasting periods are generally long ?


amain-line service

✓


burban service

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csub-urban service

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dall of the above

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View Answer main-line service

The return circuit for tramcars is through_______________?


a neutral wire

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brails

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ccables

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d common earthing

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View Answer rails

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


aLess current drain on the heavy load torque

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bCurrent surges after temporary switching off supply

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cSelf relieving property

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dCommutating property at heavy load

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The resistance encountered by a train in motion is on account of_________________?


aresistance offered by air

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bfriction at the track

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cfriction at various parts of the rolling stock

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dall of the aboveall of the above

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View Answer all of the above

Battery operated trucks are used in________________?


asteel mills

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bpower stations

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cnarrow gauge traction

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dfactories for material transportation

✓



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