FURNACE TECHNOLOGY QUIZ

Combustion of fuel in a furnace with oxygen enriched air results in higher

Flame temperature

Stack loss

Fuel consumption

Flue gas volume

TRUE ANSWER : ?
YOUR ANSWER : ?

Ostwald charts are meant for

Computation of flue gas analysis

Calculation of flue gas temperature

None of these

Computing the excess/deficiency of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rotary furnace?

Annealing furnace

Soaking pit

Lime kiln

Stoves

TRUE ANSWER : ?
YOUR ANSWER : ?

An example of a periodic furnace is the

Coke oven heating chamber

Blast furnace stoves

Rotary kilns

Blast furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.

Recirculating

Underfired

Covered

Sidefired

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum heat transfer in high temperature furnaces is by

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

Radiation

Convection

Conduction

TRUE ANSWER : ?
YOUR ANSWER : ?

In practical operation of any furnace, zero oxygen percentage or theoretical CO₂ percentage in flue gas is rarely achieved, because of

Use of pulverised solid fuels

Imperfect mixing of fuel & air and infiltration of air

Use of non-preheated combustion air

Use of excessive positive draft in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Blast furnace stoves are meant for heating

Steam

Air

None of these

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

85

15

70

40

TRUE ANSWER : ?
YOUR ANSWER : ?

Reducing atmosphere is maintained in a

Calcination kiln

Blast furnace

Soaking pit

L.D. converter

TRUE ANSWER : ?
YOUR ANSWER : ?

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