Important Industrial Drive Multiple Choice Questions and Answers
11. Heavy duty cranes are used in
A. Ore handling plants
B. Steel plants
C. Heavy engineering workshops
D. All of the above
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D. All of the above
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12. By the use of which of the following DC can be obtained from AC?
A. Silicon diodes
B. Mercury arc rectifier
C. Motor generator set
D. Any of the above
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13. Besides a constant speed a synchronous rotor possesses which of the following advantages ?
A. Lower cost
B. Better efficiency
C. High power factor
D. All of the above
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14. Which of the following types of motor and enclosure is safest?
A. Totally enclosed
B. Totally enclosed fan cooled
C. Open time
D. Semi closed
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15. The capacity of a crane is expressed in terms of
A. Type of drive
B. Span
C. Tonnes
D. Any of the above
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