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Rectifiers and Converters - Interview Questions and Answers

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46. The potential drop in the arc, in a mercury arc rectifier, varies
A. 0.05 V to 0.2 V per cm length of the arc
B. 0.5 V to 1.5 V per cm length of the arc
C. 2 V to 3.5 V per cm length of the arc
D. none of the above
Explanation:
47. Which of the following is reversible in action ?
A. Motor generator set
B. Motor converter
C. Rotary converter
D. Any of the above
Explanation:
48. A rotary converter operates at a
A. low power factor
B. high power factor
C. zero power factor
D. none of the above
Explanation:
49. In a rotary converter armature currents are
A. d.c. only
B. a.c. only
C. partly a.c. and partly d.c.
D. partly a.c. and partly d.c.
Explanation:
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