FURNACE TECHNOLOGY QUIZ

Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

20

40

80

65

TRUE ANSWER : ?
YOUR ANSWER : ?

The method of Lobo and Evans is concerned with the calculation of the

Heat transfer by forced convection in a reboiler

Heat transfer in vacuum condensers

Mass transfer co-efficient

Heat absorption in radiant section of a furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Hearth furnaces are not used for

Roasting

None of these

Reheating

Melting

TRUE ANSWER : ?
YOUR ANSWER : ?

Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

Preheating the combustion air

Preheating the fuel gas

All of these

Oxygen enrichment of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a periodic furnace?

Tunnel kiln

Rotary kiln

Soaking pit

Reheating 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.

Covered

Underfired

Recirculating

Sidefired

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat recoverable from flue gases of furnaces depends on the

Thermal efficiency of furnace

All of these

Flue gas temperature drop through the furnace

Quantity of flue gases

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs preheating, heating and soaking zones?

Soaking pit

Reheating furnace

Open hearth furnace

Cupola

TRUE ANSWER : ?
YOUR ANSWER : ?

An example of a periodic furnace is the

Rotary kilns

Blast furnace stoves

Coke oven heating chamber

Blast furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate of scaling of furnace stock depends upon the

Temperature

Nature of atmosphere

All of these

Time

TRUE ANSWER : ?
YOUR ANSWER : ?

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