Specific energy consumption becomes________________? A. more on steeper gradient B. more with high train resistance C. less if distance between stops is moreD. all of the above

The value of co-efficient of adhesion will be high when rails are_________________? A. greased B. wet C. sprayed with oilD. cleaned with sand

For three-phase induction motors which of the following is the least efficient method of speed control ? A. Cascade control B. Pole changingC. Rheostat control D. Combination of cascade and pole changing

In main line service as compared to urban and suburban service______________? A. distance between the stops is more B. maximum speed reached is high C. acceleration and retardation rates are lowD. all of the above

Which of the following is the disadvantage of electric traction over other systems of traction ? A. Corrosion problems in the under-ground pipe work B. Short time power failure interrupts traffic for hoursC. High capital outlay in fixed installations beside…

Quadrilateral speed-time curve pertains to which of the following services ? A. Main line service B. Urban service C. Sub-urban serviceD. Urban and sub-urban service

Co-efficient of adhesion is________________-? A. high in case of D.C. traction than in the case of AC. tractionB. low in case of D.C. traction than in the case of AC. traction C. equal in both AC. and D.C. traction D.…

Which of the following braking systems is used on steam locomotives ? A. Hydraulic system B. Pneumatic systemC. Vacuum system D. None of the above

The rate of acceleration on suburban orurban services is restricted by the consideration of______________? A. Engine power B. Track curvesC. Passenger Discomfort D. Track size

The friction at the track is proportional to________________? A. 1/speed B. l/(speed)2C. speed D. none of the above