RECTIFIERS AND CONVERTERS QUIZ

The ignited or auxiliary anode in mercury arc rectifier is made of

Graphite

Aluminium

Boron carbide

Copper

TRUE ANSWER : ?
YOUR ANSWER : ?

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

All of the listed here

Voltage drop in arc

Voltage drop at the anode

Voltage drop at the cathode

TRUE ANSWER : ?
YOUR ANSWER : ?

The ionization potential of mercury is approximately

16.4 V

10.4 V

None of the listed here

5.4 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

capacitance

resistance

leakage reactance

all of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

In a rotary converter I2R losses as compared to a D.C. generator of the same size will be

Remain same

None of the listed here

Less

More

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is reversible in action?

Motor converter

Rotary converter

All of the listed here

Motor generator set

TRUE ANSWER : ?
YOUR ANSWER : ?

In selenium rectifiers efficiencies ranging from to percent are attainable

40, 50

75, 85

20, 30

30, 60

TRUE ANSWER : ?
YOUR ANSWER : ?

The advantage of mercury arc rectifier is that

it has high efficiency

All of the listed here

it is light in weight and occupies small floor space

it is comparatively noiseless

TRUE ANSWER : ?
YOUR ANSWER : ?

In a mercury arc rectifier, the anode is usually made of

silver

aluminium

copper

graphite

TRUE ANSWER : ?
YOUR ANSWER : ?

Mercury, in arc rectifiers, is chosen for cathode because

Its ionization potential is relatively low

Its boiling point and specific heat are low

All of the listed here

Its atomic weight is quite high

TRUE ANSWER : ?
YOUR ANSWER : ?

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