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Recent questions tagged speed-time

1 answer 32 views

In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are ______ respectively.  (A) positive, negative and negative (B) positive, zero and negative (C) positive, positive and negative (D) positive, negative and zero

asked Apr 30, 2018 in Switchgear And Protection by Shimroz123
1 answer 49 views

In electric traction for a trapezoidal speed-time curve, the time period is (A) free running speed period = constant speed period (B) free running period = coasting period (C) free running period + coasting period = constant speed period (D) average speed period = scheduled speed period

asked Apr 28, 2018 in Power Electronic Controlled Drives by Shimroz123
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Trapezoidal speed-time curve is (A) an exact representation of the conditions in Main-line traction service. (B) an exact representation of the conditions in Suburban traction service. (C) a close approximation of the conditions in Suburban traction service. (D) a close approximation of the conditions in Mainline traction service.

asked Apr 28, 2018 in Utilization of electrical energy by Shimroz123
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