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Rectifiers and Converters

Rectifiers and Converters
Which of the following is reversible in action?

Motor converter
Rotary converter
Motor generator set
All of the listed here

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Rectifiers and Converters
A rotary converter operates at a

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

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Rectifiers and Converters
A rotary converter is a single machine with

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

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Rectifiers and Converters
Which of the following is the loss within the mercury arc rectifier chamber?

All of the listed here
Voltage drop at the cathode
Voltage drop at the anode
Voltage drop in arc

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

Selenium rectifiers
Mechanical rectifiers
Copper oxide rectifiers
Mercury arc rectifiers

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

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

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