FURNACE TECHNOLOGY QUIZ

In a furnace operation, which is not preheated?

Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)

Both A and B

Solid fuels

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of

Furnace oil with oxygen

Blast furnace gas with oxygen

Blast furnace gas with air

Furnace oil with air

TRUE ANSWER : ?
YOUR ANSWER : ?

An example of a periodic furnace is the

Blast furnace

Rotary kilns

Coke oven heating chamber

Blast furnace stoves

TRUE ANSWER : ?
YOUR ANSWER : ?

Air filtration in a furnace

Increases the flue gas temperature

Reduces its thermal efficiency

None of these

Is indicated by flame sting out

TRUE ANSWER : ?
YOUR ANSWER : ?

The resistance furnace produces heat by the

Flow of current through a heating element

Combination of induced current and skin effect

None of these

Electric arc struck between electrodes and the charge

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?

Increase in calorific value of the fuel

Saving in fuel consumption

Reduction in scale losses

Increase in flame temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat recoverable from flue gases of furnaces depends on the

Thermal efficiency of furnace

All of these

Quantity of flue gases

Flue gas temperature drop through the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Circulation of gases in furnace is caused by the

Furnace pressure in conjunction with draft in flues

Difference in density between hot and cold gases

All of these

Change in volume during a change of temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

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

99

85

50

65

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rotary furnace?

Annealing furnace

Soaking pit

Stoves

Lime kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

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