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Rectifiers and Converters

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

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

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Rectifiers and Converters
Which of the following are the applications of D.C. system?

Arc welding
Electrolytic and electro-chemical processes
All of the listed here
Battery charging work

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Rectifiers and Converters
Which of the following rectifiers have been used extensively in supplying direct current for electroplating?

Mercury arc rectifiers
Mechanical rectifiers
Copper oxide rectifiers
Selenium rectifiers

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Rectifiers and Converters
The internal efficiency of a mercury arc rectifier depends on

current only
voltage and current
r.m.s. value of current
voltage only

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Rectifiers and Converters
In a grid control of mercury arc rectifiers when the grid is made positive relative to cathode, then it the electrons on their may to anode.

any of the listed here
none of the listed here
decelerates
accelerates

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Rectifiers and Converters
Which of the following metals is generally manufactured by electrolysis process?

Copper
Zinc
Aluminium
Load

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