FURNACE TECHNOLOGY QUIZ

Ceramic recuperators compared to metallic recuperators for the same duty

Occupy more space

Have higher pressure differential between flue gas & air side

Are lighter

Are less costly

TRUE ANSWER : ?
YOUR ANSWER : ?

Furnace pressure is normally controlled by regulating the

Fuel gas pressure

Damper

Air pressure

Speed of I.D. fan

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat balance of furnace provides means of determining the

All of these

Scope of reduction of heat losses

Sources of heat losses

Thermal efficiency of the process

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following furnaces, the gases are sucked through the stock bed from below?

Beehive oven

Soaking pit

Sintering machine

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

In low or standard frequency induction furnace, heat is produced by the

Induction and resistance

None of these

Combination of induced current and skin effect

Current flow through a heating element

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 fuel gas

Oxygen enrichment of combustion air

All of these

Preheating the combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace?

Waste heat boiler

Economiser

Regenerator

Ceramic recuperator

TRUE ANSWER : ?
YOUR ANSWER : ?

Reheating furnace (pusher type) is used for heating

Slabs

Ingots

Steel coils

Steel sheets

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.

40

80

20

60

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat transfer rate to the stock/charge in the furnace does not depend upon the

Use of waste heat recovery equipments

Emissivity of the refactory walls

Size of the furance

Thickness of the stock

TRUE ANSWER : ?
YOUR ANSWER : ?

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