RECTIFIERS AND CONVERTERS QUIZ

In a single phase rotary converter the number of slip rings will be

Six

Four

Three

Two

TRUE ANSWER : ?
YOUR ANSWER : ?

A commutating rectifier consists of commutator driven by

An induction motor

A D.C. shunt motor

A synchronous motor

A D.C. series motor

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following metals is generally manufactured by electrolysis process?

Aluminium

Load

Zinc

Copper

TRUE ANSWER : ?
YOUR ANSWER : ?

A rotary converter is a single machine with

none of the listed here

two armatures and one field

one armature and one field

one armature and two fields

TRUE ANSWER : ?
YOUR ANSWER : ?

In mercury arc rectifiers having grid, the arc can be struck between anode and cathode only when the grid attains a certain potential, this potential being known as

critical grid voltage

non of the listed here

maximum grid voltage

all of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

A mercury arc rectifier possesses ________ regulation characteristics

none of the listed here

straight line

curved line

exponential

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Voltage drop at the cathode

Voltage drop at the anode

All of the listed here

Voltage drop in arc

TRUE ANSWER : ?
YOUR ANSWER : ?

On which of the following factors the number of phases for which a rectifier should be designed depends?

The voltage regulation of the rectifier should be low

The power factor of the system should be high

In the output circuit there should be no harmonics

All of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

A synchronous converter can be started

from D.C. side as D.C. motor

by means of a small auxiliary motor

All of the listed here

from A.C. side as induction motor

TRUE ANSWER : ?
YOUR ANSWER : ?

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

All of the listed here

phase

polarity

magnitude

TRUE ANSWER : ?
YOUR ANSWER : ?

↑