Electric Traction Exam Practice Test - Set 05 - ObjectiveBooks

Electric Traction Exam Practice Test - Set 05

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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