Electric Traction Due to which of the following coefficient of adhesion improves? All of the listed here Rust on the rails Sand on the rails Dust on the rails All of the listed here Rust on the rails Sand on the rails Dust on the rails ANSWER DOWNLOAD EXAMIANS APP
Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Rheostat control Pole changing Combination of cascade and pole changing Cascade control Rheostat control Pole changing Combination of cascade and pole changing Cascade control ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Series motor is not suited for traction duty due to which of the following account? Less current drain on the heavy load torque Current surges after temporary switching off supply Commutating property at heavy load Self relieving property Less current drain on the heavy load torque Current surges after temporary switching off supply Commutating property at heavy load Self relieving property ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction? Tap changing control of transformer All of the listed here Series parallel operation of motors Reduced current method Tap changing control of transformer All of the listed here Series parallel operation of motors Reduced current method ANSWER DOWNLOAD EXAMIANS APP
Electric Traction When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when Both of the listed here Degree of curvature is more None of the listed here Wheel base of axles is more Both of the listed here Degree of curvature is more None of the listed here Wheel base of axles is more 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
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