Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Rheostat control Combination of cascade and pole changing Pole changing Cascade control Rheostat control Combination of cascade and pole changing Pole changing Cascade control ANSWER DOWNLOAD EXAMIANS APP
Electric Traction If the coefficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails? 0.35 0.46 0.16 0.26 0.35 0.46 0.16 0.26 ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The overall efficiency of steam locomotive is around 35 to 45 percent 25 to 35 percent 15 to 20 percent 5 to 10 percent 35 to 45 percent 25 to 35 percent 15 to 20 percent 5 to 10 percent ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The efficiency of diesel locomotives is nearly 30 to 40 percent 45 to 55 percent 20 to 25 percent 60 to 70 percent 30 to 40 percent 45 to 55 percent 20 to 25 percent 60 to 70 percent ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The braking retardation is usually in the range 5 to 8 km phps 3 to 5 km phps 0.15 to 0.30 km phps 15 to 30 km phps 5 to 8 km phps 3 to 5 km phps 0.15 to 0.30 km phps 15 to 30 km phps ANSWER DOWNLOAD EXAMIANS APP
Electric Traction _________ frequency is not common in low frequency traction system 16 Hz None of the listed here 40 Hz 25 Hz 16 Hz None of the listed here 40 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS