Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Cascade control Rheostat control Pole changing Combination of cascade and pole changing Cascade control Rheostat control Pole changing Combination of cascade and pole changing ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The return circuit for tram cars is through A. Neutral wire Common earthing Neutral wire Cables Rails Common earthing Neutral wire Cables Rails ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following braking systems on the locomotives is costly? All braking systems are equally costly Vacuum braking on steam locomotives Regenerative braking on electric locomotives Vacuum braking on diesel locomotives All braking systems are equally costly Vacuum braking on steam locomotives Regenerative braking on electric locomotives Vacuum braking on diesel locomotives ANSWER DOWNLOAD EXAMIANS APP
Electric Traction For 25 kV single phase system power supply frequency is 100 Hz 25 Hz 50 Hz 60 Hz 100 Hz 25 Hz 50 Hz 60 Hz ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction? 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 Series parallel operation of motors ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Specific energy consumption is least in _______ service. Urban Main line None of the listed here Suburban Urban Main line None of the listed here Suburban ANSWER DOWNLOAD EXAMIANS APP
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