industrial drives MCQs – Page 4

Practise focused industrial drives questions with marked answers for exam preparation and subject revision.

industrial drives Mcqs

61. Flame proof motors are used in_________________?
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A. steel mills

B. explosive atmospheres

C. moist atmospheres

D. paper mills

62. In jaw crushers a motor has to often start against ____________________ load?
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A. heavy

B. normal

C. low

D. medium

63. Which of the following motors always starts on load ?
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A. Fan motor

B. All of the above

C. Floor mill motor

D. Conveyor motor

64. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?
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A. Starting characteristics

B. Braking

C. Efficiency

D. Running characteristics

65. The load cycle for a motor driving a power press will be________________?
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A. continuous but periodical

B. variable load

C. intermittent and variable load

D. continuous

66. ________________is preferred for automatic drives?
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A. Ward-Leonard controlled D.C. motors

B. Any of the above

C. Squirrel cage induction motor

D. Synchronous motors

67. Which of the following motors are pre-ferred for overhead travelling cranes ?
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A. Slow speed motors

B. Continuous duty motors

C. Short time rated motors

D. None of the above

68. When the load is above _______________ a synchronous motor is found to be more economical?
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A. 50 kW

B. 20 kW

C. 100 kW

D. 2 kW

69. Light duty cranes are used in which of the following ?
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A. All of the above

B. Pumping stations

C. Power houses

D. Automobile workshops

70. Which of the following motors is preferred for traction work ?
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A. Three-phase induction motor

B. Synchronous motor

C. Universal motor

D. D.C. series motor

71. The selection of an electric motor for any application depends on which of the following factors ?
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A. All of the above

B. Mechanical characteristics

C. Cost

D. Electrical characteristics

E. Size and rating of motors

Showing 61 to 71 of 71 mcqs