1) In mail line train services, the
a. Acceleration and braking periods are long
b. Acceleration and braking periods are short
c. Free run and coasting periods are long
d. Both (b) and (c)
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Answer
Explanation
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ANSWER: Both (b) and (c)
Explanation:
No explanation is available for this question!
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2) The magnitude for the tractive effort which is required for the propulsion of the train depends on
a. The adhesive weight
b. Friction between the driving wheel and the track
c. Both (a) and (b)
d. Neither (a) nor (b)
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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3) If W is the dead weight of the train in tones and A is the acceleration of the train in kmphps then the tractive effort required for linear acceleration is given by
a. WA newtons
b. 177.7 WA newtons
c. 277.8 WA newtons
d. 388.8 WA newtons
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Answer
Explanation
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ANSWER: 277.8 WA newtons
Explanation:
No explanation is available for this question!
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4) During the train movement, the tractive effort produced at the pinion by the motor is transferred to the driving wheel
a. Directly
b. Through the gear wheel
c. Through the road wheel
d. Through the motor armature
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Answer
Explanation
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ANSWER: Through the gear wheel
Explanation:
No explanation is available for this question!
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5) The area under the speed - time curve represents the
a. Acceleration of the train
b. Time taken by the train
c. Distance travelled by the train
d. Crest speed
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Answer
Explanation
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ANSWER: Distance travelled by the train
Explanation:
No explanation is available for this question!
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6) The scheduled speed of a train can be increased by
a. Increasing the acceleration and retardation
b. Increasing the crest speed
c. Decreasing the duration of stop
d. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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7) The ratio of the distance between any two stops and the sum of the time of run and the time of stop at one station is known as
a. Crest speed
b. Average speed
c. Maximum speed
d. Scheduled speed
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Answer
Explanation
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ANSWER: Scheduled speed
Explanation:
No explanation is available for this question!
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8) In urban or city train service, the
a. Acceleration period is absent
b. Free running period is absent
c. Coasting period is absent
d. Braking period is absent
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Answer
Explanation
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ANSWER: Free running period is absent
Explanation:
No explanation is available for this question!
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9) In speed time curve for trains, the notching period is
a. Constant acceleration period
b. Free running period of the train
c. Braking period of the train
d. Coasting period of the train
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Answer
Explanation
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ANSWER: Constant acceleration period
Explanation:
No explanation is available for this question!
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10) The slope of the speed - time curve at any point gives the
a. Acceleration of the train at that point of time
b. Retardation of the train at that point of time
c. Distance travelled by the train
d. Either (a) or (b)
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Answer
Explanation
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ANSWER: Either (a) or (b)
Explanation:
No explanation is available for this question!
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