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Rectifiers and Converters - Interview Questions and Answers

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1. With a motor converter it is possible to obtain D.C. voltage only upto
A. 200-100 V
B. 600�800 V
C. 1000�1200 V
D. 1700�2000 V
Explanation:
2. Which of the following AC. motors is usually used in large motor-generator sets?
A. Synchronous motor
B. Squirrel cage induction motor
C. Slip ring induction motor
D. Any of the above
Explanation:
3. In a rotary converter I2R losses as compared to a D.C. generator of the same size will be
A. same
B. less
C. double
D. three times
Explanation:
4. The internal efficiency of a mercury arc rectifier depends on
A. voltage only
B. current only
C. voltage and current
D. r.m.s. value of current
Explanation:
5. Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?
A. Motor-generator set
B. Motor converter
C. Rotary converter
D. Mercury arc rectifier
Explanation:
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