Hiried Electric Traction Multiple choice Questions and Answers pdf

31.    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
Ans: d

32.    Which of the following is the disadvantage of electric traction over other systems of traction ?
(a)     Corrosion problems in the under-ground pipe work
(b)     Short time power failure interrupts traffic for hours
(c)     High capital outlay in fixed instal-lations beside route limitation
(d)    Interference with communication lines
(c)     All of the above
Ans: c

33.    Co-efficient of adhesion is
(a)     high in case of D.C. traction than in the case of AC. traction
(b)     low in case of D.C. traction than in the case of AC. traction
(c)     equal in both AC. and D.C. traction
(d)    any of the above
Ans: b

34.    Speed-time curve of main line service differs from those of urban and suburban services on following account
(a)     it has longer free running period
(b)     it has longer coasting period
(c)    accelerating and braking periods are comparatively smaller
(d)    all of the above
Ans: d

35.    The rate of acceleration on suburban orurban services is restricted by the consideration of
(a)     Engine power
(b)     Track curves
(c)     Passenger Discomfort
(d)     Track size
Ans: c

36.    The specific energy consumption of a train depends on which of the following ?
(a)    Acceleration and retardation
(b)    Gradient
(c)    Distance covered
(d)    All of the above
Ans: d

37.    The friction at the track is proportional to
(a)     1/speed 
(b)     l/(speed)2
(c)     speed 
(d)     none of the above
Ans: c

38.    The air resistance to the movement of the train is proportional to
(a) speed 
(b) (speed)
(c) (speed) 
(d) 1/speed
Ans: b

39.    The normal value of adhesion friction is
(a) 0.12 
(b) 0.25
(c) 0.40 
(d) 0.75
Ans: b

40.    The pulsating torque exerted by steam locomotives causes which of the following?
(a)     Jolting and skidding
(b)     Hammer blow
(c)    Pitching
(d)    All of the above
Ans: a

Read More Questions:
Electric Traction MCQs part1
Electric Traction MCQs part2
Electric Traction MCQs part3
Electric Traction MCQs part4
Electric Traction MCQs part5
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Electric Traction MCQs part7
Electric Traction MCQs part8