The speed of a superfast train is______________?

Related Mcqs:

1. An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?

   A. 150msec-1
   B. 384msec-1
   C. 38.4msec-1
   D. 200msec-1

2. The wheels of a train, engine as well as bogies, are slightly tapered to_____________?

   A. reduce friction
   B. increase friction
   C. facilitate braking
   D. facilitate in taking turns

3. The air resistance to the movement of the train is proportional to_____________?

   A. speed
   B. (speed)
   C. (speed)
   D. 1/speed

4. The specific energy consumption of a train depends on which of the following ?

   A. Acceleration and retardation
   B. Gradient
   C. Distance covered
   D. All of the above

5. The resistance encountered by a train in motion is on account of_________________?

   A. resistance offered by air
   B. friction at the track
   C. friction at various parts of the rolling stock
   D. all of the above

6. Energy consumption in propelling the train is required for which of the following?

   A. Work against the resistance to motion
   B. Work against gravity while moving up the gradient
   C. Acceleration
   D. All of the above

7. Power for lighting in passanger coach, in a long distance electric train, is provided_________________?

   A. directly through overhead electric line
   B. through individual generator of bogie and batteries
   C. through rails
   D. through locomotive

8. The speed of a locomotive is controlled by_______________?

   A. flywheel
   B. gear box
   C. applying brakes 11.
   D. regulating steam flow to engine

9. Quadrilateral speed-time curve pertains to which of the following services ?

   A. Main line service
   B. Urban service
   C. Sub-urban service
   D. Urban and sub-urban service

10. For three-phase induction motors which of the following is the least efficient method of speed control ?

    A. Cascade control
    B. Pole changing
    C. Rheostat control
    D. Combination of cascade and pole changing