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.Management Sciences
Category: Electric Traction
The wheels of a train, engine as well as bogies, are slightly tapered to_____________?
A. reduce friction
B. increase friction
C. facilitate braking
D. facilitate in taking turns
Quadrilateral speed-time curve pertains to which of the following services ?
A. Main line service
B. Urban service
C. Sub-urban service
D. Urban and sub-urban service
An ideal traction system should have_______________?
A. easy speed control
B. high starting tractive effort
C. equipment capable of with standing large temporary loads
D. all of the above
For which of the following locomotives the maintenance requirements are the least ?
A. Steam locomotives
B. Diesel locomotives
C. Electric locomotives
D. Equal in all of the above
The efficiency of diesel locomotives is nearly_______________?
A. 20 to 25 percent
B. 30 to 40 percent
C. 45 to 55 percent
D. 60 to 70 percent
Which of the following happens in Kando system ?
A. Three phase A.C. is converted into D.C.
B. Single phase A.C. is converted into D.C.
C. Single phase supply is converted into three phase system
D. None of the above
The steam engine provided on steam locomotives is____________?
A. single acting condensing type
B. single acting non-condensing type
E. double acting condensing type
D. double acting non-condensing type
In case of _________________ free running and coasting periods are generally long ?
A. main-line service
B. urban service
C. sub-urban service
D. all of the above
Co-efficient of adhesion reduces due to the presence of which of the following ?
A. Sand on rails
B. Dew on rails
C. Oil on the rails
D. both B. and C.
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