Questions on Electric Traction Multiple choice Questions and Answers pdf

71.    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
Ans: b

72.    Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?
(a)     Reduced current method
(b)     Tap changing control of transformer
(c)    Series parallel operation of motors
(d)    All of the above
Ans: b

73.    If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?
(a)     0.3 
(b)     0.26
(c)     0.225 
(d)     0.16
Ans: d

74    watt-hours per tonne km is usually the specific energy consumption for suburban services.
(a)     15—20 
(b)     50—75
(c)     120—150 
(d)     160—200
Ans: b

75.   The braking retardation is usually in the range
(a)     0.15 to 0.30 km phps
(b)     0.30 to 0.6 km phps
(c)    0.6 to 2.4 km phps
(d)    3 to 5 km phps
(e)    10 to 15 km phps
Ans: d

76.    The rate of acceleration on suburban orurban service is in the range
(a)     0.2 to 0.5 km phps
(b)     1.6 to 4.0 km phps
(c)    5 to 10 km phps
(d)    15 to 25 km phps
Ans: b

77.    The coasting retardation is around
(a)     0.16 km phps
(b)     1.6 km phps
(c)     16 km phps    
(d)     40 km phps
Ans: a

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