1.
Which of the following is the loss within the mercury arc rectifier chamber?

2.
Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required?

3.
It is the_______of the transformer on which the magnitude of angle of overlap depends.

4.
Mercury, in arc rectifiers, is chosen for cathode because

5.
In which of the following equipment direct current is needed?

6.
Which of the following mercury arc rectifier will deliver least undulating current?

7.
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.

8.
A rotary converter is a single machine with

9.
The efficiency of an electrolytic rectifier is nearly

10.
The voltage drop at anode, in a mercury arc rectifier is due to

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