Electric Traction Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction? Series parallel operation of motors All of the listed here Reduced current method Tap changing control of transformer Series parallel operation of motors All of the listed here Reduced current method Tap changing control of transformer ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The rate of acceleration on sub-urban or urban services is restricted by the consideration of Engine power Passenger Discomfort Track size Track curves Engine power Passenger Discomfort Track size Track curves ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is the advantage of electric braking? More heat is generated during braking Motor continues to remain loaded during braking It is instantaneous It avoids wear of track More heat is generated during braking Motor continues to remain loaded during braking It is instantaneous It avoids wear of track ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Locomotives with monometer bogies have Lot of skidding Uneven distribution of tractive effect Suitability for passenger as well as freight service Low coefficient of adhesion Lot of skidding Uneven distribution of tractive effect Suitability for passenger as well as freight service Low coefficient of adhesion ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Energy consumption in propelling the train is required for which of the following? All of the listed here Work against gravity while moving up the gradient Work against the resistance to motion Acceleration All of the listed here Work against gravity while moving up the gradient Work against the resistance to motion Acceleration ANSWER DOWNLOAD EXAMIANS APP
Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Cascade control Rheostat control Combination of cascade and pole changing Pole changing Cascade control Rheostat control Combination of cascade and pole changing Pole changing ANSWER DOWNLOAD EXAMIANS APP
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