Electric Traction Multiple Choice Questions with Answers

Questions

61 The coasting retardation is around

A 0.16 km phps

B 1.6 km phps

C 16 km phps

D 40 km phps

View Answer

Answer: 0.16 km phps

62 The rate of acceleration on suburban orurban service is in the range

A 0.2 to 0.5 km phps

B 1.6 to 4.0 km phps

C 5 to 10 km phps

D 15 to 25 km phps

View Answer

Answer: 1.6 to 4.0 km phps

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63 The braking retardation is usually in the range

A 0.15 to 0.30 km phps

B 0.30 to 0.6 km phps

C 0.6 to 2.4 km phps

D 3 to 5 km phps

View Answer

Answer: 3 to 5 km phps

64 watt-hours per tonne km is usually the specific energy consumption for suburban services.

A 15—20

B 50—75

C 120—150

D 160—200

View Answer

Answer: 50—75

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

A 0.3

B 0.26

C 0.225

D 0.16

View Answer

Answer: 0.16

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

A Reduced current method

B Tap changing control of transformer

C Series parallel operation of motors

D All of the above

View Answer

Answer: Tap changing control of transformer

67 For which of the following locomotives the maintenance requirements are the least?

A Steam locomotives

B Diesel locomotives

C Electric locomotives

D Equal in all of the above

View Answer

Answer: Diesel locomotives

68 Which of the following happens in Kando system ?

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

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

C Single phase supply is converted into three phase system

D None of the above

View Answer

Answer: Single phase supply is converted into three phase system

69 In case of a steam engine an average coal consumption per km is nearly

A 150 to 175 kg

B 100 to 120 kg

C 60 to 80 kg

D 28 to 30 kg

View Answer

Answer: 28 to 30 kg

70 Suri transmission is

A electrical-pneumatic

B mechanical-electrical

C hydro-mechanical

D hydro-pneumatic

View Answer

Answer: hydro-mechanical

71 In India, electrification of railway track was done for the first time in which of the following years ?

A 1820—1825

B 1880—1885

C 1925—1932

D 1947—1954

View Answer

Answer: 1925—1932

72 Power for lighting in passanger coach, in a long distance electric train, is provided

A directly through overhead electric line

B through individual generator of bogie and batteries

C through rails

D through locomotive

View Answer

Answer: through individual generator of bogie and batteries

73 For 25 kV single phase system power supply frequency is

A 60 Hz

B 50 Hz

C 25 Hz

D 16 Hz

View Answer

Answer: 50 Hz

74 _______ frequency is not common in low frequency traction system

A 40 Hz

B 25 Hz

C 16 Hz

D None

View Answer

Answer: 40 Hz

75 _______ was the first city in India to adopt electric traction.

A Delhi

B Madras

C Calcutta

D Bombay

View Answer

Answer: Bombay

76 Locomotives with monometer bogies have

A uneven distribution of tractive effect

B suitability for passanger as well as freight service

C lot of skidding

D low co-efficient of adhesion

View Answer

Answer: suitability for passanger as well as freight service

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