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Rectifiers and Converters

Rectifiers and Converters
A rotary converter operates at a

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

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Rectifiers and Converters
Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required?

Motor-generator set
Mercury arc rectifier
Motor converter
Rotary converter

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

colour of mercury
ionization
high temperature
electron streams

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Rectifiers and Converters
With a motor converter it is possible to obtain D.C. voltage only upto

1700-2000 V
1000-1200 V
600-800 V
200-100 V

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Rectifiers and Converters
The advantage of mercury arc rectifier is that

it is light in weight and occupies small floor space
it has high efficiency
All of the listed here
it is comparatively noiseless

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

1500 A
500 A
2000 A
200 A

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