Computer Programming MCQs

5739 MCQs  (Page 522 of 574)

Attempt Computer Programming MCQs Quiz
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
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In squirrel cage induction motors which of the following methods of starting cannot be used ?
A. resistance in rotor circuit
B. resistance in stator circuit
C. auto-transformer starting
D. star-delta starting
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Flame proof motors are used in_________________?
A. paper mills
B. steel mills
C. mosit atmospheres
D. explosive atmospheres
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In jaw crushers a motor has to often start against ____________________ load?
A. heavy
B. medium
C. normal
D. low
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Heat control switches are used in__________________?
A. transformers
B. cooling ranges
C. three phase induction motors
D. single phase
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__________________ has relatively wider range of speed control?
A. synchronous motor
B. ship ring induction motor
C. squirrel cage induction motor
D. d.c. shunt motor
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Which of the following motors is usually preferred for kiln drives ?
A. cascade controlled a.c. motor
B. slip ring induction motor
C. three phase shunt wound com-mutator motor
D. any of the above
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_________________method of starting a three phase induction motor needs six terminals ?
A. star-delta
B. resistance starting
C. auto-transformer
D. none of the above
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The size of an excavator is usually expressed in terms of_________________?
A. ‘crowd’ motion
B. angle of swing
C. cubic metres
D. travel in metres
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Rotor of a motor is usually supported on ___________________ bearings?
A. ball or roller
B. needle
C. bush
D. thrust
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Word of the Day
16 Jul
Volatile
(of a substance) easily evaporated at normal temperatures.
بدلتے مزاج والا، کافور صفت

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