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Rectifiers and Converters

Rectifiers and Converters
Which of the following mercury arc rectifier will deliver least undulating current?

Six-phase
Three-phase
Single-phase
Two-phase

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

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

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Rectifiers and Converters
Which of the following AC. motors is usually used in large motor-generator sets?

Any of the listed here
Slip ring induction motor
Synchronous motor
Squirrel cage induction motor

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

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

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

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

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Rectifiers and Converters
If cathode and anode connections in a mercury arc rectifier are inter changed

Internal losses will be reduced
Both ion and electron streams will move in the same direction
The rectifier will operate at reduced efficiency
The rectifier will not operate

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