- A. More on steeper gradient
- B. More with high train resistance
- C. Less if distance between stops is more
- D. All of the above
Electric Traction
-
Specific energy consumption becomes
-
In main line service as compared to urban and suburban service
- A. Distance between the stops is more
- B. Maximum speed reached is high
- C. Acceleration and retardation rates are low
- D. All of the above
-
Due to which of the following coefficient of adhesion improves?
- A. Rust on the rails
- B. Dust on the rails
- C. Sand on the rails
- D. All of the above
-
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
-
The efficiency of diesel locomotives is nearly
- A. 20 to 25 percent
- B. 30 to 40 percent
- C. 45 to 55 percent
- D. 60 to 70 percent
-
Overload capacity of diesel engines is usually restricted to
- A. 2 percent
- B. 10 percent
- C. 20 percent
- D. 40 percent
-
Which of the following braking systems on the locomotives is costly?
- A. Regenerative braking on electric locomotives
- B. Vacuum braking on diesel locomotives
- C. Vacuum braking on steam locomotives
- D. All braking systems are equally costly
-
Which of the following drives is suitable for mines where explosive gas exists?
- A. Steam engine
- B. Diesel engine
- C. Battery locomotive
- D. Any of the above
-
Tractive effort is required to
- A. Overcome the gravity component of train mass
- B. Overcome friction, windage and curve resistance
- C. Accelerate the train mass
- D. Do all of the above
-
Quadrilateral speed-time curve pertains to which of the following services?
- A. Main line service
- B. Urban service
- C. Suburban service
- D. Urban and suburban service