FURNACE TECHNOLOGY QUIZ

Size of the combustion chamber of a furnace depends upon the

Preheat temperature of fuel & air

Method of mixing the fuel & air

All of these

Heat release rate of the fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate of scaling of furnace stock depends upon the

Temperature

Time

Nature of atmosphere

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Ceramic recuperators compared to metallic recuperators for the same duty

Are lighter

Are less costly

Have higher pressure differential between flue gas & air side

Occupy more space

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum heat transfer in high temperature furnaces is by

Either A, B or C; depends on the type of furnace

Conduction

Convection

Radiation

TRUE ANSWER : ?
YOUR ANSWER : ?

The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.

Low frequency induction

Arc

High frequency induction

Resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Kcal/hr/m³ combustion space

None of these

Kcal/hr

Kcal/m³ combustion space

TRUE ANSWER : ?
YOUR ANSWER : ?

Reducing atmosphere is maintained in a

Blast furnace

Soaking pit

L.D. converter

Calcination kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one is not an induced draught furnace?

Sintering furnace

None of these

High pressure boiler

Blast furnace stove

TRUE ANSWER : ?
YOUR ANSWER : ?

Low stack loss indicates the

Efficient use of fuel

Inefficient use of fuel

Use of sub-stoichiometric air for combustion

Oxygen enrichment of combustion air

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

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

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

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?