FURNACE TECHNOLOGY QUIZ

Which furnace employs preheating, heating and soaking zones?

Reheating furnace

Soaking pit

Open hearth furnace

Cupola

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is a regenerative furnace?

Neither A nor B

Open hearth furnace

Both A and B

Coke oven heating chamber

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators as compared to recuperators for the same duty

Are lighter & compact

Store smaller quantity of waste heat

All of these

Involve higher initial cost

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat balance of furnace provides means of determining the

Scope of reduction of heat losses

Thermal efficiency of the process

Sources of heat losses

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Turndown ratio of a burner gives an idea of the __________ in the furnace.

Range of fuel firing rates

Volume of the combustion chamber

Minimum heat input rate only

Maximum heat input rate only

TRUE ANSWER : ?
YOUR ANSWER : ?

Size of the combustion chamber of a furnace depends upon the

Method of mixing the fuel & air

Heat release rate of the fuel

Preheat temperature of fuel & air

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Low stack loss indicates the

Inefficient use of fuel

Efficient use of fuel

Use of sub-stoichiometric air for combustion

Oxygen enrichment of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Shaft furnaces are used for

Smelting

All of these

Roasting

Calcining

TRUE ANSWER : ?
YOUR ANSWER : ?

Artificial draught produced by a fan in the furnace can be controlled by the

Speed of the fan

Variation in the pitch of fan blades

Damper

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The amount of combustible escaping uncon-sumed from the furnace, depends upon the

Burner design (thoroughness of mixing versus stratification)

Air supplied and furnace temperature

All of these

Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)

TRUE ANSWER : ?
YOUR ANSWER : ?