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Rectifiers and Converters

Rectifiers and Converters
In a mercury arc rectifier______ flow from anode to cathode

All of the listed here
electrons
ions
ions and electrons

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Rectifiers and Converters
A synchronous converter can be started

by means of a small auxiliary motor
All of the listed here
from D.C. side as D.C. motor
from A.C. side as induction motor

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Rectifiers and Converters
Selenium rectifier can be operated at temperatures as high as

25°C
40°C
60°C
75°C

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Rectifiers and Converters
The advantage of mercury arc rectifier is that

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

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Rectifiers and Converters
A rotary converter combines the function of

a synchronous motor and a D.C. generator
an induction motor and a D.C. generator
None of the listed here
Both 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?

Mercury arc rectifier
Motor-generator set
Rotary converter
Motor converter

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