FURNACE TECHNOLOGY QUIZ

Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of

Low emissivity

Neither A nor B

High thermal conductivity

Both A and B

TRUE ANSWER : ?
YOUR ANSWER : ?

In reverberatory furnace, charge is heated mainly by

None of these

Radiation of heat from the roof of the combustion chamber

Natural convection

Conduction

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

Sidefired

Recirculating

Underfired

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is an indirectly heated furnace.

Muffle furnace

Open hearth furnace

Reheating furnace

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

Dampers are located

After the I.D. fan

Anywhere after the I.D. fan

Before the I.D fan

Near the top of the chimney

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following variables does not affect the furnace capacity?

None of these

Gas velocity in furnace

Ratio of wall surface to surface of stock

Size of the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

The purpose of controlling the furnace atmosphere is to prevent surface attack by

Decarburising

Sulphur penetration

Oxidation/scaling

Either of the above

TRUE ANSWER : ?
YOUR ANSWER : ?

Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an

Economiser

Air preheater

Steam superheater

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Size of the furance

Emissivity of the refactory walls

Thickness of the stock

Use of waste heat recovery equipments

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Heat absorption in radiant section of a furnace

Heat transfer by forced convection in a reboiler

Mass transfer co-efficient

Heat transfer in vacuum condensers

TRUE ANSWER : ?
YOUR ANSWER : ?

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