FURNACE TECHNOLOGY QUIZ

The heating capacity of continuous reheating furnace depends upon the

All of these

Ratio of wall surface to stock surface

Hearth area and furnace temperature

Emissivity of the stock

TRUE ANSWER : ?
YOUR ANSWER : ?

In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

Rate of firing and emissivity of flame

Nature of process ; whether batch, continuous or intermittant

All of these

Thermal conductivity of the charge & structural materials of furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Reducing atmosphere is maintained in a

Soaking pit

Blast furnace

Calcination kiln

L.D. converter

TRUE ANSWER : ?
YOUR ANSWER : ?

The purpose of controlling the furnace atmosphere is to prevent surface attack by

Oxidation/scaling

Either of the above

Decarburising

Sulphur penetration

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following variables affects the furnace capacity?

All of these

Thermal conductivity of stock

Temperature of flue gas

Thickness of heating stock

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

Beehive oven

Sintering machine

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following accentuates clinker-ing troubles on furnace grate burning coal?

Low reactivity of carbonised residue containing high proportion of iron & sulphur

Thick firebed and preheated primary air

Low forced draft & fuel bed temperature

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The function of an economiser in a boiler is to preheat the

Furnace oil

Feedwater

Combustion air

Pulverised coal

TRUE ANSWER : ?
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Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?

Ash disposal problem

Erosion of induced draft fan blades

Higher power consumption in its transportation

Excessive fly ash discharge from the stack

TRUE ANSWER : ?
YOUR ANSWER : ?

The reason for excessive clinker formation in gas producers is the

All of these

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

Use of fuel having too low an ash fusion temperature

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

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YOUR ANSWER : ?