Practice Test: Question Set - 05
1. 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
2. Specific energy consumption is least in _______ service.
- (A) Main line
- (B) Main line
- (C) Suburban
- (D) None of these
3. The rate of acceleration on suburban or urban 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
4. Long distance railways use which of the following?
- (A) 200 V D.C.
- (B) 25 kV single phase A.C.
- (C) 25 kV two phase A.C.
- (D) 25 kV three phase A.C.
5. In tram ways which of the following motors is used?
- (A) D.C. shunt motor
- (B) D.C. series motor
- (C) A.C. three phase motor
- (D) AC. single phase capacitor start motor
6. The wheels of a train, engine as well as bogies, are slightly tapered to
- (A) Reduce friction
- (B) Increase friction
- (C) Facilitate braking
- (D) Facilitate in taking turns
7. 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
8. The specific energy consumption of a train depends on which of the following?
- (A) Acceleration and retardation
- (B) Gradient
- (C) Distance covered
- (D) All of the above
9. For three-phase induction motors which of the following is the least efficient method of speed control?
- (A) Cascade control
- (B) Pole changing
- (C) Rheostat control
- (D) Combination of cascade and pole changing
10. In case of ___________ free running and coasting periods are generally long.
- (A) Mainline service
- (B) Urban service
- (C) Suburban service
- (D) All of the above
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