225. The return circuit for tramcars is through
A. neutral wire
B. rails
C. cables
D.common earthing
226. Specific energy consumption is least in service.
A. main line
B. urban
C. suburban
D. none ofthe above
227. 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
228. ____ was the first city in India to adopt electric traction.
A. Delhi
B. Madras
C. Calcutta
D. Bombay
229. ___ frequency is not common in low frequency traction system
A. 40 Hz
B. 25 Hz
C. 16 -3 Hz
D. none of the above
230. For 25 kV single phase system power supply frequency is
A. 60 Hz
B. 50 Hz
C. 25 Hz
D. 16 - Hz
231. Power for lighting in passenger 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
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