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Rectifiers and Converters

Rectifiers and Converters
In a mercury arc rectifier characteristic blue luminosity is due to

colour of mercury
electron streams
ionization
high temperature

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Rectifiers and Converters
In a glass bulb mercury arc rectifier the maximum current rating is restricted to

500 A
200 A
2000 A
1500 A

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Rectifiers and Converters
Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of

100 A at 100 V
400 A at 400 V
300 A at 300 V
500 A at 500 V

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Rectifiers and Converters
A rotary converter is a single machine with

one armature and one field
one armature and two fields
none of the listed here
two armatures and one field

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Rectifiers and Converters
In selenium rectifiers efficiencies ranging from ______ to ______ percent are attainable

20, 30
40, 50
75, 85
30, 60

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Rectifiers and Converters
A rotary converter operates at a

zero power factor
high power factor
None of the listed here
low power factor

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MORE MCQ ON Rectifiers and Converters

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