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Recent questions tagged traction

1 answer 945 views

The motor used for electric traction is  (1) D.C. shunt motor (3) D.C. series motor  (2) D.C. compound motor (4) Synchronous motor

asked May 1, 2018 in Utilization of electrical energy by Shimroz123
1 answer 32 views

In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are ______ respectively.  (A) positive, negative and negative (B) positive, zero and negative (C) positive, positive and negative (D) positive, negative and zero

asked Apr 30, 2018 in Switchgear And Protection by Shimroz123
1 answer 52 views

In electric traction for a trapezoidal speed-time curve, the time period is (A) free running speed period = constant speed period (B) free running period = coasting period (C) free running period + coasting period = constant speed period (D) average speed period = scheduled speed period

asked Apr 28, 2018 in Power Electronic Controlled Drives by Shimroz123
1 answer 41 views

Which of the following test is usually conducted to determine the efficiency of traction motors ? (A) Field’s test (B) Swinburne’s test (C) Hopkinson’s test (D) Retardation test.

asked Apr 28, 2018 in Electrical Machine by Shimroz123
0 answers 28 views

Why DC motor is used for traction?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 13 views

Which motor is used in traction system?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 68 views

What is the traction system?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
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