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

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100 TOP Objective Electric Traction Questions and Answers pdf

61.    Specific energy consumption is least in _______ service.
(a)    main line 
(b)    urban
(c)    suburban
Ans: a

62.    Locomotives with monometer bogies have
(a)    uneven distribution of tractive effect
(b)    suitability for passanger as well as freight service
(c)    lot of skidding
(d)     low co-efficient of adhesion
Ans: b

63    _______ was the first city in India to adopt electric traction.
(a)     Delhi 
(b)     Madras
(c)     Calcutta 
(d)     Bombay
Ans: d

64    _______ frequency is not common in low frequency traction system
(a)     40 Hz 
(b)     25 Hz
(c)     16 Hz
Ans: a

65.    For 25 kV single phase system power supply frequency is   
(a)     60 Hz 
(b)     50 Hz
(c)     25 Hz 
(d)     16 Hz
Ans: b

66.    Power for lighting in passanger coach, in a long distance electric train, is provided
(a)    directly through overhead electric line
(b)    through individual generator of bogie and batteries
(c)    through rails
(d)    through locomotive
Ans: b

67.    In India, electrification of railway track was done for the first time in which of  the following years ?
(a)     1820—1825    
(b)     1880—1885
(c)     1925—1932    
(d)     1947—1954
Ans: c

68.    Suri transmission is   
(a)     electrical-pneumatic
(b)     mechanical-electrical
(c)    hydro-mechanical
(d)    hydro-pneumatic
Ans: c

69.    In case of a steam engine an average coal consumption per km is nearly
(a)     150 to 175 kg 
(b)     100 to 120 kg
(c)     60 to 80 kg     
(d)     28 to 30 kg
Ans: d

70.    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
Ans: c

Read More Questions:
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Electric Traction MCQs part8