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Rectifiers and Converters

Rectifiers and Converters
A rotary converter operates at a

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

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Rectifiers and Converters
The potential drop in the arc, in a mercury arc rectifier, varies

0.05 V to 0.2 V per cm length of the arc
2 V to 3.5 V per cm length of the arc
none of the listed here
0.5 V to 1.5 V per cm length of the arc

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Rectifiers and Converters
When a rectifier is loaded which of the following voltage drops take place ?

Voltage drop in resistance of transformer and smoothing chokes
All of the listed here
Voltage drop in transformer reactance
Arc voltage drop

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Rectifiers and Converters
A rotary converter is a single machine with

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

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Rectifiers and Converters
Copper oxide rectifier is usually designed not to operate above

75°C
30°C
45°C
55°C

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Rectifiers and Converters
The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following

anode drop and cathode drop
anode drop and arc drop
anode drop, cathode drop and arc drop
cathode drop and arc drop

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