FURNACE TECHNOLOGY QUIZ

Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

1050

1250

750

350

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

Type of burner and combustion chamber

All of these

Physical nature, ash content and fineness of the coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Tunnel kilns are usually used for

Melting of glass

Drying/tempering of refractories

Roasting of pyrites

Reheating of slabs

TRUE ANSWER : ?
YOUR ANSWER : ?

Reverberatory furnace is used for

Roasting/reduction of ores

Annealing steel coil

Heating air

Steel melting

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs preheating, heating and soaking zones?

Cupola

Open hearth furnace

Reheating furnace

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most suitable for preheating combustion air above 650°C ?

Regenerator

None of these

Metallic recuperator

Ceramic recuperator

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an

Annealing furnace

Blast furnace

Steam boiler

Salt bath furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Calcination of limestone to produce lime is done in a __________ kiln.

Tunnel

Both B and C

Vertical shaft

Rotary

TRUE ANSWER : ?
YOUR ANSWER : ?

Pot furnace which is either regenerative or recupterative, is used in the manufacture of

Glass

Refractory bricks

Potteries

Stainless steel

TRUE ANSWER : ?
YOUR ANSWER : ?

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 : ?

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