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MCQs

Total Questions : 86 | Page 1 of 9 pages
Question 1. Heavy duty cranes are used in
  1.    Ore handling plants
  2.    Steel plants
  3.    Heavy engineering workshops
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 2. Rotor of a motor is usually supported on _________ bearings.
  1.    Ball or roller
  2.    Needle
  3.    Bush
  4.    Thrust
 Discuss Question
Answer: Option A. -> Ball or roller
Question 3. When the load is above _________ a synchronous motor is found to be more economical.
  1.    2 kW
  2.    20 kW
  3.    50 kW
  4.    100 kW
 Discuss Question
Answer: Option D. -> 100 kW
Question 4. For derris and winches which of the following drives can be used?
  1.    Pole changing squirrel cage motors
  2.    D.C. motors with Ward-Leonard control
  3.    A.C. slip ring motors with variable resistance
  4.    Any of the above
 Discuss Question
Answer: Option D. -> Any of the above
Question 5. Which of the following motors is preferred for traction work?
  1.    Universal motor
  2.    D.C. series motor
  3.    Synchronous motor
  4.    Three-phase induction motor
 Discuss Question
Answer: Option B. -> D.C. series motor
Question 6. Belted slip ring induction motor is almost invariably used for
  1.    Water pumps
  2.    Jaw crushers
  3.    Centrifugal blowers
  4.    None of the above
 Discuss Question
Answer: Option B. -> Jaw crushers
Question 7. Which feature, while selecting a motor for centrifugal pump, will be of least significance?
  1.    Starting characteristics
  2.    Operating speed
  3.    Horse power
  4.    Speed control
 Discuss Question
Answer: Option D. -> Speed control
Question 8. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance?
  1.    Running characteristics
  2.    Starting characteristics
  3.    Efficiency
  4.    Braking
 Discuss Question
Answer: Option D. -> Braking
Question 9. Which of the following motors is preferred when quick speed reversal is the main consideration?
  1.    Squirrel cage induction motor
  2.    Wound rotor induction motor
  3.    Synchronous motor
  4.    D.C. motor
 Discuss Question
Answer: Option D. -> D.C. motor
Question 10. For blowers which of the following motor is preferred?
  1.    D.C. series motor
  2.    D.C. shunt motor
  3.    Squirrel cage induction motor
  4.    Wound rotor induction motor
 Discuss Question
Answer: Option B. -> D.C. shunt motor

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