Important Electric Traction Multiple Choice Questions and Answers

6.  The electric motor used for traction work should be mechanically

   A. Small in overall dimensions

   B. Light in weight and robust in construction

   C. Capable to withstand continuous vibration

   D. All of the above

7.  The electric motor used for traction work, electrically should be

   A. Capable of developing high starting torque and with standing voltage fluctuations and temporary supply interruptions

   B. Amenable to simple speed control methods self protective against excessive overloading and amenable to easy and simple methods of Rio static or regenerative breaking

   C. Of such characteristics that when they are operated in parallel and coupled mechanically, they share the load almost equal

   D. All of the above

8.  DC shunt motor are not suitable table for traction services because of their

   A. Hard characteristics

   B. Large time constant

   C. Power verifying directly with developed torque

   D. All of the above

9.  Braking system employed in diesel electric traction is

   A. Hydraulic type

   B. Vacuum type

   C. Regenerative type

   D. Any of the above

10.  The type of breaking used in electric traction is

   A. Mechanical breaking

   B. Vacuum brake system

   C. Electropneumatic breaking

   D. Both A and C

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