FURNACE TECHNOLOGY QUIZ

Which furnace employs natural draft?

Coke oven

Rotary kilns

Boiler

L.D. converter

TRUE ANSWER : ?
YOUR ANSWER : ?

Scaling of furnace stock is reduced by __________ in flue gas.

CO

All of these

H₂

High CO/CO₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

Reduces the furnace draught

Increases the load on the induced draft fan

Reduces the flue gas temperature and makes the furnace atmosphere oxidising

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Thickness of the stock

Emissivity of the refactory walls

Size of the furance

Use of waste heat recovery equipments

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

Updraft kiln

Muffle furnace

Continuous furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following furnaces, the gases are sucked through the stock bed from below?

None of these

Sintering machine

Beehive oven

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel used in B.F. stove is

Blast furnace gas/mixed gas

Coke oven gas

Furnace oil

Pulverised coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators compared to the recuperators for the same duty

Occupy more space

Are of smaller size

Are less costly

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Rotary kilns are used in the

Calcination of limestone & dolomite

Cement manufacture

Both A and B

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

250

130

80

180

TRUE ANSWER : ?
YOUR ANSWER : ?

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