MCQ Quiz on Industrial Drives - Set 04 - ObjectiveBooks

MCQ Quiz on Industrial Drives - Set 04

Practice Test: Question Set - 04


1. Which of the following motors is used for elevators?
    (A) Induction motor
    (B) Synchronous motor
    (C) Capacitor start single phase motor
    (D) Any of the above

2. Light duty cranes are used in which of the following?
    (A) Power houses
    (B) Pumping stations
    (C) Automobile workshops
    (D) All of the above

3. For blowers which of the following motor is preferred?
    (A) D.C. series motor
    (B) D.C. shunt motor
    (C) Squirrel cage induction motor
    (D) Wound rotor induction motor

4. For derris and winches which of the following drives can be used?
    (A) Pole changing squirrel cage motors
    (B) D.C. motors with Ward-Leonard control
    (C) A.C. slip ring motors with variable resistance
    (D) Any of the above

5. For crane travel which of the following motors is normally used?
    (A) Synchronous motor
    (B) D.C. differentially compound motor
    (C) Ward-Leonard controlled D.C. shunt motor
    (D) AC. slip ring motor

6. Which of the following alternatives will be cheaper?
    (A) A 100 H.P. AC. three phase motor
    (B) Four motors of 25 H.P. each
    (C) Five motors of 20 H.P. each
    (D) Ten motors of 10 H.P. each

7. Which of the following happens when star-delta starter is used?
    (A) Starting voltage is reduced
    (B) Starting current is reduced
    (C) Both (A) and (B)
    (D) None of the above

8. In case of __________ speed control by injecting e.m.f. in the rotor circuit is possible,
    (A) D.C. shunt motor
    (B) Schrage motor
    (C) Synchronous motor
    (D) Slip ring induction motor

9. For a motor-generator set which of the following motors will be preferred?
    (A) Synchronous motor
    (B) Slip ring induction motor
    (C) Pole changing induction motor
    (D) Squirrel cage induction motor

10. Which of the following motors are best for the rolling mills?
    (A) Single phase motors
    (B) Squirrel cage induction motors
    (C) Slip ring induction motors
    (D) D.C. motors

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