RECTIFIERS AND CONVERTERS QUIZ

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 : ?

In phase-shift control method the control is carried out by varying the of grid voltage.

polarity

magnitude

All of the listed here

phase

TRUE ANSWER : ?
YOUR ANSWER : ?

A mercury arc rectifier possesses ________ regulation characteristics

straight line

none of the listed here

exponential

curved line

TRUE ANSWER : ?
YOUR ANSWER : ?

The applications of selenium rectifiers are usually limited to potential of

30 V

20 V

100 V

10 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A commutating rectifier consists of commutator driven by

A D.C. series motor

An induction motor

A D.C. shunt motor

A synchronous motor

TRUE ANSWER : ?
YOUR ANSWER : ?

In a mercury arc rectifier______ flow from anode to cathode

electrons

ions

All of the listed here

ions and electrons

TRUE ANSWER : ?
YOUR ANSWER : ?

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.

any of the listed here

accelerates

none of the listed here

decelerates

TRUE ANSWER : ?
YOUR ANSWER : ?

The metal rectifiers, as compared to mercury arc rectifiers

operate on low temperatures

can operate on high voltages

can operate on heavy loads

give poor regulation

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Copper oxide rectifiers

Mercury arc rectifiers

Selenium rectifiers

Mechanical rectifiers

TRUE ANSWER : ?
YOUR ANSWER : ?

A rotary converter combines the function of

Both of the listed here

a synchronous motor and a D.C. generator

an induction motor and a D.C. generator

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

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