FURNACE TECHNOLOGY QUIZ

Which is a regenerative furnace?

Open hearth furnace

Both A and B

Neither A nor B

Coke oven heating chamber

TRUE ANSWER : ?
YOUR ANSWER : ?

The reason for excessive clinker formation in gas producers is the

Use of fuel having too low an ash fusion temperature

Use of coal/coke containing a high % of fines and ash

Development of hot spots in the fuel bed and an abnormally high rate of gasification

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Size of the combustion chamber of a furnace depends upon the

Preheat temperature of fuel & air

Heat release rate of the fuel

Method of mixing the fuel & air

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

1050

750

1250

350

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat transfer rate to the charge/stock in a furnace does not depend upon the

Flue gas temperature

Type of fuels viz solid, liquid or gaseous

Emissivity of refractory walls

Initial temperature of the charged stock

TRUE ANSWER : ?
YOUR ANSWER : ?

In reverberatory furnace, charge is heated mainly by

None of these

Radiation of heat from the roof of the combustion chamber

Conduction

Natural convection

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following furnaces will have maximum thermal efficiency?

Boiler furnace

Walking beam reheating furnace

Soaking pits

Rotary kilns

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 : ?

Hearth furnaces are not used for

Roasting

Melting

Reheating

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Radiation

Convection

Conduction

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?