Objective Electric Traction Questions and Answers pdf

51.    Locomotive having monomotor bogies
(a)     has better coefficient of adhesion
(b)     are suited both for passanger as well as freight service
(c)    has better riding qualities due to the reduction of lateral forces
(d)    has all above qualities
 Ans: d

52.    Series motor is not suited for traction duty due to which of the following account ?
(a)       Less current drain on the heavy load torque
(b)      Current surges after temporary switching off supply
(c)      Self relieving property
(d)     Commutating property at heavy load
Ans: b

53.    When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when
(a)     wheel base of axles is more
(b)     degree of curvature is more
(c)     both (a) and (b)
(d)     none of the above
Ans: c

54.    Energy consumption in propelling the train is required for which of the following?
(a)     Work against the resistance to motion
(b)     Work against gravity while moving up the gradient
(c)     Acceleration
(d)    All of the above
Ans: d

55.    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
Ans: d

56    have maximum unbalanced forces
(a)    Diesel shunters
(b)    Steam locomotives
(c)    Electric locomotives
(d)    Diesel locomotives
Ans: b

57.    Specific energy consumption is affected by which of the following factors ?
(a)     Retardation and acceleration values
(b)     Gradient
(c)     Distance between stops
(d)     All of the above
Ans: d

58.    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
Ans: a

59.    Overhead lines for power supply to tramcars are at a minimum height of
(a)    3 m 
(b)    6 m
(c)    10 m 
(d)    tO m
Ans: c

60.    The return circuit for tramcars is through    
(a)    neutral wire   
(b)    rails
(c)    cables 
(d)    common earthing
Ans: b

Read More Questions:
Electric Traction MCQs part1
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Electric Traction MCQs part8