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Dear candidates you will find MCQ questions of Control of Electric Drives here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

Q. 1) The selection of an electric motor for any application depends on which of the following factors ?

(A) Electrical characteristics
(B) Mechanical characteristics
(C) Size and rating of motors
(D) All of the above
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Q. 2) For a particular application the type of electric-and control gear are determined by which of the following considerations ?

(A) Starting torque
(B) Conditions of environment
(C) Limitation on starting current
(D) All of the above
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Q. 3) Which ofthefollowingmotors is preferred for traction work ?

(A) Universal motor
(B) D.C. series motor
(C) Synchronous motor
(D) Three-phase induction motor
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Q. 4) Which of the following motors always starts on load ?

(A) Conveyor motor
(B) Floor mill motor
(C) Fan motor
(D) All of the above
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Q. 5) is preferred for automatic drives.

(A) Squirrel cage induction motor
(B) Synchronous motors
(C) Ward-Leonard controlled
(D) motors
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Q. 6) When the load is above a synchronous motor is found to be more economical.

(A) 2 kW
(B) 20 kW
(C) 50 kW
(D) 100 kW
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Q. 7) The load cycle for a motor driving a power press will be

(A) variable load
(B) continuous
(C) continuous but periodical
(D) intermittent and variable load
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Q. 8) Light duty cranes are used in which of the following ?

(A) Power houses
(B) Pumping stations
(C) Automobile workshops
(D) All of the above
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Q. 9) While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?

(A) Running characteristic
(B) Starting characteristics
(C) Efficiency
(D) Braking
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Q. 10) Which of the following motors are pre-ferred for overhead travelling cranes ?

(A) Slow speed motor
(B) Continuous duty motors
(C) Short time rated motors
(D) None of the above
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