electric traction MCQs – Page 3

Practise focused electric traction questions with marked answers for exam preparation and subject revision.

electric traction Mcqs

41. The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to_____________/
0

A. 10

B. 17

C. 14

D. 5

42. When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when_______________?
0

A. wheel base of axles is more

B. degree of curvature is more

C. both A. and B.

D. none of the above

43. The friction at the track is proportional to________________?
0

A. 1/speed

B. speed

C. none of the above

D. l/(speed)2

44. In tramways which of the following motors is used ?
0

A. A.C. three phase motor

B. D.C. series motor

C. D.C. shunt motor

D. AC. single phase capacitor start motor

45. _______________method can bring the locomotive to dead stop?
0

A. Plugging braking

B. None of the above

C. Rheostatic braking

D. Regenerative braking

46. Automatic signalling is used for which of the following trains ?
0

A. Mail and express trains

B. Superfast trains

C. All trains

D. Suburban and Urban electric trains

47. In a steam locomotive electric power is provided through_____________?
0

A. diesel engine generator

B. overhead wire

C. battery system

D. small turbo-generator

48. The speed of a superfast train is______________?
0

A. more than 100 kmph

B. 75 kmph

C. 60 kmph

D. 100 kmph

49. The horsepower of steam locomotives is______________?
0

A. 1500 to 2000

B. 3000 to 4000

C. up to 1500

D. 2000 to 3000

50. The efficiency of diesel locomotives is nearly_______________?
0

A. 20 to 25 percent

B. 30 to 40 percent

C. 45 to 55 percent

D. 60 to 70 percent

51. Overhead lines for power supply to tramcars are at a minimum height of______________?
0

A. 3 m

B. 6 m

C. 10 m

D. 15 m

52. have maximum unbalanced forces_______________?
0

A. Electric locomotives

B. Diesel shunters

C. Steam locomotives

D. Diesel locomotives

53. In main line service as compared to urban and suburban service______________?
0

A. all of the above

B. distance between the stops is more

C. acceleration and retardation rates are low

D. maximum speed reached is high

54. ________________ frequency is not common in low frequency traction system?
0

A. 16 Hz

B. 40 Hz

C. 25 Hz

D. non of these

55. The overall efficiency of steam locomotive is around_____________?
0

A. 5 to 10 percent

B. 35 to 45 percent

C. 25 to 35 percent

D. 15 to 20 percent

56. Which of the following braking systems is used on steam locomotives ?
0

A. Vacuum system

B. Hydraulic system

C. Pneumatic system

D. None of the above

57. Due to which of the following co-efficient of adhesion improves ?
0

A. All of the above

B. Dust on the rails

C. Rust on the rails

D. Sand on the rails

58. The specific energy consumption of a train depends on which of the following ?
0

A. Gradient

B. All of the above

C. e covered

D. Acceleration and retardation

59. _________ locomotive has the highest operational availability?
0

A. Steam

B. Electric

C. Diesel

60. Co-efficient of adhesion is________________-?
0

A. high in case of D.C. traction than in the case of AC. traction

B. low in case of D.C. traction than in the case of AC. traction

C. equal in both AC. and D.C. traction

D. any of the above

Showing 41 to 60 of 74 mcqs