- (A) Jolting and skidding
- (B) Hammer blow
- (C) Pitching
- (D) All of the above
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- (A) Sand on rails
- (B) Dew on rails
- (C) Oil on the rails
- (D) both
- (A) steel mills
- (B) power stations
- (C) narrow gauge traction
- (D) factories for material transportation
- (A) Vacuum pump
- (B) Ejector
- (C) Any of the above
- (D) None of the above
- (A) Plugging braking
- (B) Rheostatic braking
- (C) Regenerative braking
- (D) None of the above
- (A) 12 V
- (B) 24 V
- (C) 220 V
- (D) 600 to 750 V
- (A) more on steeper gradient
- (B) more with high train resistance
- (C) less if distance between stops is more
- (D) all of the above
- (A) greased
- (B) wet
- (C) sprayed with oil
- (D) cleaned with sand
- (A) Cascade control
- (B) Pole changing
- (C) Rheostat control
- (D) Combination of cascade and pole changing
- (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
