FURNACE TECHNOLOGY QUIZ

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

Walking beam

Shaft

Tunnel

Rotary hearth

TRUE ANSWER : ?
YOUR ANSWER : ?

In salt bath furnace, heat is transferred to the charge mainly by

Convection

Conduction

Radiation

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Turn down ratio of a burner

Should be 1:1 for a batch type furnace.

Is the ratio of maximum to minimum permissible heat input rates

Should be as low as possible i.e., 1 : 2

Is normally much more for a continuous furnace as compared to a batch furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum heat transfer in high temperature furnaces is by

Convection

Conduction

Either A, B or C; depends on the type of furnace

Radiation

TRUE ANSWER : ?
YOUR ANSWER : ?

Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of

Blast furnace gas with oxygen

Furnace oil with air

Blast furnace gas with air

Furnace oil with oxygen

TRUE ANSWER : ?
YOUR ANSWER : ?

Pulverised fuel fired furnaces employ __________ fuel firing.

Horizontal

Vertical

Tangential

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel economy in an industrial furnace operation can not be achieved by the use of

Combustion air not enriched with oxygen

Non-preheated combustion air

Recupterators

Stoichiometric combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Rotary kilns are used in the

Neither A nor B

Calcination of limestone & dolomite

Cement manufacture

Both A and B

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum thermal efficiency of boiler may be about __________ percent.

25

90

10

65

TRUE ANSWER : ?
YOUR ANSWER : ?

In order to maintain a reducing atmosphere in a furnace, it should have

None of these

No O₂ in flue gas

High excess air

CO in flue gas

TRUE ANSWER : ?
YOUR ANSWER : ?

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