Recent questions tagged speed-time

Description : 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

Last Answer : In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are positive, negative and negative respectively. 

Description : 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

Last Answer : In electric traction for a trapezoidal speed-time curve, the time period is free running period + coasting period = constant speed period

Description : 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) ... in Suburban traction service. (D) a close approximation of the conditions in Mainline traction service.

Last Answer : Trapezoidal speed-time curve is a close approximation of the conditions in Mainline traction service.