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Electric traction
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ The rate of acceleration on suburban or urban services is restricted by the consideration of passanger discomfort [other wrong options] [Discuss in forum] engine power track curves track size |
Q22 ⇒ Battery operated trucks are used in factories for material transportation [other wrong options] [Discuss in forum] steel mills power stations narrow gauge traction |
Q23 ⇒ When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when (a)(b) [other wrong options] [Discuss in forum] wheel base of axles is more degree of curvature is more none of the above |
Q24 ⇒ Locomotives with monometer bogies have suitability for passanger as well as freight service [other wrong options] [Discuss in forum] uneven distribution of tractive effect lot of skidding low co-efficient of adhesion |
Q25 ⇒ For which of the following locomotives the maintenance requirements are the least ? Electric locomotives [other wrong options] [Discuss in forum] Steam locomotives Diesel locomotives Equal in all of the above |
Q26 ⇒ For 600 V D.C. line for tramcars track is connected to negative of the supply [other wrong options] [Discuss in forum] positive of the supply mid voltage of 300 V none of the above |
Q27 ⇒ Which of the following is the voltage for single phase A.C. system ? 15 kV [other wrong options] [Discuss in forum] 22 V 440 V 5 kV |
Q28 ⇒ The horsepower of steam locomotives is upto 1500 [other wrong options] [Discuss in forum] 1500 to 2000 2000 to 3000 3000 to 4000 |
Q29 ⇒ Electric locomotives in India are manufactured at Chittranjan [other wrong options] [Discuss in forum] Jamalpur Bangalore Gorakhpur |
Q30 ⇒ Tractive effort is required to do all of the above [other wrong options] [Discuss in forum] overcome the gravity component of train mass overcome friction, windage and curve resistance accelerate the train mass |
Q31 ⇒ The specific energy consumption of a train depends on which of the following? All of the above [other wrong options] [Discuss in forum] Acceleration and retardation Gradient Distance covered |
Q32 ⇒ ____ method can bring the locomotive to dead stop. Plugging braking [other wrong options] [Discuss in forum] Rheostatic braking Regenerative braking None of the above |
Q33 ⇒ Energy consumption in propelling the train is required for which of the following? All of the above [other wrong options] [Discuss in forum] Work against the resistance to motion Work against gravity while moving up the gradient Acceleration |
Q34 ⇒ ____ was the first city in India to adopt electric traction. Bombay [other wrong options] [Discuss in forum] Delhi Madras Calcutta |
Q35 ⇒ Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ? Tap changing control of transformer [other wrong options] [Discuss in forum] Reduced current method Series parallel operation of motors All of the above |
Q36 ⇒ Which of the following is an advantage of electric traction over other methods of traction ? All of the above [other wrong options] [Discuss in forum] Faster acceleration No pollution problems Better braking action |
Q37 ⇒ The overall efficiency of steam locomotive is around 5 to 10 percent [other wrong options] [Discuss in forum] 15 to 20 percent 25 to 35 percent 35 to 45 percent |
Q38 ⇒ The wheels of a train, engine as well as bogies, are slightly tapered to facilitate in taking turns [other wrong options] [Discuss in forum] reduce friction increase friction facilitate braking |
Q39 ⇒ For given maximum axle load tractive efforts of A.C. locomotive will be locomotive more than that of D.C. locomotive [other wrong options] [Discuss in forum] less than that of D.C. equal to that of D.C. locomotive none of the above |
Q40 ⇒ The friction at the track is proportional to speed [other wrong options] [Discuss in forum] 1/speed 1/(speed)2 none of the above |
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