Electrical Engineering MCQs

Page No. 46

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


a3 m


b6 m


c10 m


d15 m


View Answer 10 m

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


aWork against the resistance to motion


bWork against gravity while moving up the gradient


cAcceleration


dAll of the above


View Answer All of the above

An ideal traction system should have_______________?


aeasy speed control


bhigh starting tractive effort


cequipment capable of with standing large temporary loads


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


bdegree of curvature is more


c both A. and B.


dnone of the above


View Answer both A. and B.

have maximum unbalanced forces_______________?


aDiesel shunters


bSteam locomotives


cElectric locomotives


dDiesel locomotives


View Answer Steam locomotives

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


amain-line service


burban service


csub-urban service


dall of the above


View Answer main-line service

The return circuit for tramcars is through_______________?


a neutral wire


brails


ccables


d common earthing


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


bCurrent surges after temporary switching off supply


cSelf relieving property


dCommutating property at heavy load



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


aresistance offered by air


bfriction at the track


cfriction at various parts of the rolling stock


dall of the aboveall of the above


View Answer all of the above

Battery operated trucks are used in________________?


asteel mills


bpower stations


cnarrow gauge traction


dfactories for material transportation



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