FURNACE TECHNOLOGY QUIZ

The rate of scaling of furnace stock depends upon the

All of these

Temperature

Time

Nature of atmosphere

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 : ?

Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the

Amount of excess air supplied and load on the boiler

All of these

Physical nature, ash content and fineness of the coal

Type of burner and combustion chamber

TRUE ANSWER : ?
YOUR ANSWER : ?

Power required in case of forced draught as compared to induced draught (for the same draught produced) is

Same

Either more or less; depends on the flue gas density Answer: Option B

Less

More

TRUE ANSWER : ?
YOUR ANSWER : ?

Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a

Furnace employing negative pressure

Reducing atmosphere

Furnace employing neutral atmosphere

Carbon resistance furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are used for waste heat recovery in

Blast furnace stoves

By-product coke ovens

Soaking pits

Beehive coke oven

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

85

65

99

50

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of pulverised coal in boilers provides

Better combustion

Smokeless burning

Higher calorific value

Less erosion on furnace wall

TRUE ANSWER : ?
YOUR ANSWER : ?

Rate of heat release in a furnace, which is the measure of heat intensity is defined as

Kcal/hr

Kcal/m³ combustion space

None of these

Kcal/hr/m³ combustion space

TRUE ANSWER : ?
YOUR ANSWER : ?

Blast furnace stoves are meant for heating

Blast furnace gas

Steam

Air

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?