FURNACE TECHNOLOGY QUIZ

A refractory wall separating the stock and the source of heat is provided in a

Muffle furnace

Updraft kiln

None of these

Continuous furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are installed in

Coke ovens

Both A & B

Open hearth furnace

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

< 2

< 8

< 5

< 10

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs preheating, heating and soaking zones?

Soaking pit

Open hearth furnace

Reheating furnace

Cupola

TRUE ANSWER : ?
YOUR ANSWER : ?

Cement Kiln is a

Rotary Kiln

Tunnel Kiln

Natural draft furnace

Batch furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

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

CO in flue gas

High excess air

None of these

No O₂ in flue gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

Fine dolomite

None of these

Ammonia

Alkaline powders

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat recoverable from flue gases of furnaces depends on the

Flue gas temperature drop through the furnace

All of these

Thermal efficiency of furnace

Quantity of flue gases

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of

Combustion of coal by supplying it around the burner

Drying of coal

Preheating the primary air

Transportation of coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most suitable for preheating combustion air above 650°C ?

Metallic recuperator

Ceramic recuperator

None of these

Regenerator

TRUE ANSWER : ?
YOUR ANSWER : ?

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