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 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 Tap changing control of transformer ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Due to which of the following coefficient of adhesion improves? Dust on the rails Sand on the rails All of the listed here Rust on the rails Dust on the rails Sand on the rails All of the listed here Rust on the rails ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Long distance railways use which of the following? 200 V D.C. 25 kV three phase A.C. 25 kV single phase A.C. 25 kV two phase A.C. 200 V D.C. 25 kV three phase A.C. 25 kV single phase A.C. 25 kV two phase A.C. ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is the advantage of electric braking? It is instantaneous More heat is generated during braking Motor continues to remain loaded during braking It avoids wear of track It is instantaneous More heat is generated during braking Motor continues to remain loaded during braking It avoids wear of track ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Vacuum is created by which of the following? Vacuum pump Ejector Any of the listed here None of the listed here Vacuum pump Ejector Any of the listed here None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following braking systems on the locomotives is costly? Vacuum braking on diesel locomotives Regenerative braking on electric locomotives Vacuum braking on steam locomotives All braking systems are equally costly Vacuum braking on diesel locomotives Regenerative braking on electric locomotives Vacuum braking on steam locomotives All braking systems are equally costly ANSWER DOWNLOAD EXAMIANS APP
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