A. it has longer free running period
B. it has longer coasting period
C. accelerating and braking periods are comparatively smaller
D. all of the above
Correct Answer: all of the above ✔
Last Updated: July 30, 2021
Related MCQs
- __________watt-hours per tonne km is usually the specific energy consumption for suburban services?
- The rate of acceleration on suburban orurban service is in the range__________?
- Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?
- The braking retardation is usually in the range__________?
- The coasting retardation is around__________?
- If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?
- Which of the following happens in Kando system ?
- Power for lighting in passanger coach, in a long distance electric train, is provided__________?
- For which of the following locomotives the maintenance requirements are the least ?
- In case of a steam engine an average coal consumption per km is nearly__________?
- Suri transmission is__________?
- For 25 kV single phase system power supply frequency is__________?
- Locomotives with monometer bogies have__________?
- __________ frequency is not common in low frequency traction system?
- Locomotive having monomotor bogies__________?
- Specific energy consumption is affected by which of the following factors ?
- Specific energy consumption is least in __________ service?
- Overhead lines for power supply to tramcars are at a minimum height of__________?
- Energy consumption in propelling the train is required for which of the following?
- An ideal traction system should have__________?
- When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when__________?
- have maximum unbalanced forces__________?
- In case of __________ free running and coasting periods are generally long ?
- The return circuit for tramcars is through__________?
- Series motor is not suited for traction duty due to which of the following account ?
- The resistance encountered by a train in motion is on account of__________?
- Battery operated trucks are used in__________?
- Vacuum is created by which of the following ?
- __________method can bring the locomotive to dead stop?
- The voltage used for suburban trains in D.C. system is usually__________?
- Specific energy consumption becomes__________?
- The value of co-efficient of adhesion will be high when rails are__________?
- For three-phase induction motors which of the following is the least efficient method of speed control ?
- In main line service as compared to urban and suburban service__________?
- Which of the following is the disadvantage of electric traction over other systems of traction ?
- Quadrilateral speed-time curve pertains to which of the following services ?
- Co-efficient of adhesion is__________-?
- Which of the following braking systems is used on steam locomotives ?
- The rate of acceleration on suburban orurban services is restricted by the consideration of__________?
- The friction at the track is proportional to__________?
- The normal value of adhesion friction is__________?
- The specific energy consumption of a train depends on which of the following ?
- The air resistance to the movement of the train is proportional to__________?
- The pulsating torque exerted by steam locomotives causes which of the following ?
- Co-efficient of adhesion reduces due to the presence of which of the following ?
- Tractive effort is required to__________?
- Due to which of the following co-efficient of adhesion improves ?
- For given maximum axle load tractive efforts of AC. locomotive will be__________?
- Which of the following is the advantage of electric braking ?
- The speed of a superfast train is__________?
- Which of the following braking systems on the locomotives is costly ?