Electric Traction Mcqs

This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Electric Traction ”. These questions are chosen from a collection of most authoritative and best reference books on Electrical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Electric Traction comprehensively.

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61.
________________ frequency is not common in low frequency traction system?

40 Hz

25 Hz

16 Hz

Non of these

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62.
Locomotives with monometer bogies have_________________?

Uneven distribution of tractive effect

Suitability for passanger as well as freight service

Lot of skidding

Low co-efficient of adhesion

Answer Discus (0)

64.
Suri transmission is_________________?

Electrical-pneumatic

Mechanical-electrical

Hydro-mechanical

Hydro-pneumatic

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65.
In case of a steam engine an average coal consumption per km is nearly________________?

150 to 175 kg

100 to 120 kg

60 to 80 kg

28 to 30 kg

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66.
For which of the following locomotives the maintenance requirements are the least ?

Steam locomotives

Diesel locomotives

Electric locomotives

Equal in all of the above

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67.
Power for lighting in passanger coach, in a long distance electric train, is provided_________________?

Directly through overhead electric line

Through individual generator of bogie and batteries

Through rails

Through locomotive

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68.
Which of the following happens in Kando system ?

Three phase A.C. is converted into D.C.

Single phase A.C. is converted into D.C.

Single phase supply is converted into three phase system

None of the above

Answer Discus (0)

69.
If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?

0.3

0.26

0.225

0.16

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70.
The coasting retardation is around_________________?

0.16 km phps

1.6 km phps

16 km phps

40 km phps

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71.
The braking retardation is usually in the range__________________?

0.15 to 0.30 km phps

0.30 to 0.6 km phps

0.6 to 2.4 km phps

3 to 5 km phps

Answer Discus (0)

72.
Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

Reduced current method

Tap changing control of transformer

Series parallel operation of motors

All of the above

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73.
The rate of acceleration on suburban orurban service is in the range_________________?

0.2 to 0.5 km phps

1.6 to 4.0 km phps

5 to 10 km phps

15 to 25 km phps

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74.
_______________watt-hours per tonne km is usually the specific energy consumption for suburban services?

15—20

50—75

120—150

160—200

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