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

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