Electric Traction MCQ

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• The braking retardation is usually in the range
  ক

  0.15 to 0.30 km phps

  খ

  0.30 to 0.6 km phps

  গ

  0.6 to 2.4 km phps

  ঘ

  3 to 5 km phps
• ________ have maximum unbalanced forces
  ক

  Diesel saunters

  খ

  Steam locomotives

  গ

  Electric locomotives

  ঘ

  Diesel locomotives
• The return circuit for tram cars is through
  ক

  Neutral wire

  খ

  Rails

  গ

  Cables

  ঘ

  Common earthing
• _________ locomotive has the highest operational availability.
  ক

  Electric

  খ

  Diesel

  গ

  Steam

  ঘ

  All of the above
• In India, electrification of railway track was done for the first time in which of the following years?
  ক

  1820 - 1825

  খ

  1880 - 1885

  গ

  1925 - 1932

  ঘ

  1947 - 1954
• The rate of acceleration on sub-urban or urban services is restricted by the consideration of
  ক

  Engine power

  খ

  Track curves

  গ

  Passenger Discomfort

  ঘ

  Track size
• _______ was the first city in India to adopt electric traction.
  ক

  Delhi

  খ

  Madras (Chennai)

  গ

  Calcutta (kolkata)

  ঘ

  Bombay (Mumbai)
• Which of the following is the disadvantage of electric traction over other systems of traction?
  ক

  Corrosion problems in the underground pipe work

  খ

  Short time power failure interrupts traffic for hours

  গ

  High capital outlay in fixed installations beside route limitation

  ঘ

  Interference with communication lines
• Suri transmission is
  ক

  Electrical pneumatic

  খ

  Mechanical electrical

  গ

  Hydro mechanical

  ঘ

  Hydro pneumatic
• Overload capacity of diesel engines is usually restricted to
  ক

  2 percent

  খ

  10 percent

  গ

  20 percent

  ঘ

  40 percent
• The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to
  ক

  5

  খ

  10

  গ

  14

  ঘ

  17
• The horsepower of steam locomotives is
  ক

  Up to 1500

  খ

  1500 to 2000

  গ

  2000 to 3000

  ঘ

  3000 to 4000
• The steam engine provided on steam locomotives is
  ক

  Single acting condensing type

  খ

  Single acting non-condensing type

  গ

  Double acting condensing type

  ঘ

  Double acting non-condensing type
• Watt-hours per tonne km is usually the specific energy consumption for suburban services.
  ক

  15 - 20

  খ

  50 - 75

  গ

  120 - 150

  ঘ

  160 - 200
• In case of locomotives the tractive power is provided by
  ক

  Single cylinder double acting steam engine

  খ

  Double cylinder, single acting steam engine

  গ

  Double cylinder, double acting steam engine

  ঘ

  Single stage steam turbine
• Locomotives with monometer bogies have
  ক

  Uneven distribution of tractive effect

  খ

  Suitability for passenger as well as freight service

  গ

  Lot of skidding

  ঘ

  Low coefficient of adhesion
• Speed-time curve of main line service differs from those of urban and suburban services on following account
  ক

  It has longer free running period

  খ

  It has longer coasting period

  গ

  Accelerating and braking periods are comparatively smaller

  ঘ

  All of the above
• Which of the following is the advantage of electric braking?
  ক

  It avoids wear of track

  খ

  Motor continues to remain loaded during braking

  গ

  It is instantaneous

  ঘ

  More heat is generated during braking
• For three-phase induction motors which of the following is the least efficient method of speed control?
  ক

  Cascade control

  খ

  Pole changing

  গ

  Rheostat control

  ঘ

  Combination of cascade and pole changing
• The efficiency of diesel locomotives is nearly
  ক

  20 to 25 percent

  খ

  30 to 40 percent

  গ

  45 to 55 percent

  ঘ

  60 to 70 percent
• For diesel locomotives the range of horsepower is
  ক

  50 to 200

  খ

  500 to 1000

  গ

  1500 to 2500

  ঘ

  3000 to 5000
• Locomotive having mono-motor bogies
  ক

  Has better coefficient of adhesion

  খ

  Are suited both for passenger as well as freight service

  গ

  Has better riding qualities due to the reduction of lateral forces

  ঘ

  Has all above qualities
• An ideal traction system should have
  ক

  Easy speed control

  খ

  High starting tractive effort

  গ

  Equipment capable of withstanding large temporary loads

  ঘ

  All of the above
• Which of the following braking systems is used on steam locomotives?
  ক

  Hydraulic system

  খ

  Pneumatic system

  গ

  Vacuum system

  ঘ

  None of the above
• The air resistance to the movement of the train is proportional to
  ক

  Speed

  খ

  (Speed)²

  গ

  (Speed)³

  ঘ

  $$\frac{1}{{{\text{Speed}}}}$$
• Which of the following state capitals (in India) is not on broad gauge track?
  ক

  Lucknow

  খ

  Bhopal

  গ

  Jaipur

  ঘ

  Chandigarh
• Methods can bring the locomotive to dead stop.
  ক

  Plugging braking

  খ

  Rheostat braking

  গ

  Regenerative braking

  ঘ

  None of the above
• Which of the following is an advantage of electric traction over other methods of traction?
  ক

  Faster acceleration

  খ

  No pollution problems

  গ

  Better braking action

  ঘ

  All of the above
• For which of the following locomotives the maintenance requirements are the least?
  ক

  Steam locomotives

  খ

  Diesel locomotives

  গ

  Electric locomotives

  ঘ

  Equal in all of the above
• The overall efficiency of steam locomotive is around
  ক

  5 to 10 percent

  খ

  15 to 20 percent

  গ

  25 to 35 percent

  ঘ

  35 to 45 percent