Electric Traction On Tramways Multiple Choice Questions and Answers

31.  In tramways

   A. The power is supplied at 600 V DC is from a single overhead conductor of positive polarity

   B. The speed is controlled by field weakening or series parallel control

   C. Rheostatic and mechanical breaking are employed for normal service

   D. All of the above

32.  For tramways the return circuit is

   A. Track rails

   B. Neutral where

   C. Common earthing

   D. Cables

33.  Unlike a tramway a trolley bus needs no

   A. Driving axles

   B. Running rail

   C. Hand breaks

   D. Overhead contact wire

34.  Ordinary tramway is the most economical means of transport for

   A. Very dense traffic in large cities

   B. Rural services

   C. Suburban services

   D. All of the above

35.  For 600 V DC line for tram cars, track is connected to the

   A. Positive of the supply

   B. Negative of the supply

   C. Midvoltage of 300 V

   D. None of the above

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