FURNACE TECHNOLOGY QUIZ

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

Walking beam

Tunnel

Rotary hearth

Shaft

TRUE ANSWER : ?
YOUR ANSWER : ?

Forced recirculation of furnace gases is practised

To ensure uniform temperature

To increase heat transfer by convection

All of these

In furnaces, operating below 750°C

TRUE ANSWER : ?
YOUR ANSWER : ?

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

20

80

60

40

TRUE ANSWER : ?
YOUR ANSWER : ?

Ostwald charts are meant for

None of these

Computing the excess/deficiency of combustion air

Computation of flue gas analysis

Calculation of flue gas temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Size of the furnace

Ratio of wall surface to surface of stock

Gas velocity in furnace

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A refractory wall separating the stock and the source of heat is provided in a

Muffle furnace

Continuous furnace

None of these

Updraft kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

Increases the load on the induced draft fan

All of these

Reduces the flue gas temperature and makes the furnace atmosphere oxidising

Reduces the furnace draught

TRUE ANSWER : ?
YOUR ANSWER : ?

Reducing atmosphere is maintained in a

Calcination kiln

Soaking pit

L.D. converter

Blast furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Heat transfer in vacuum condensers

Heat absorption in radiant section of a furnace

Mass transfer co-efficient

Heat transfer by forced convection in a reboiler

TRUE ANSWER : ?
YOUR ANSWER : ?

Dampers are located

Before the I.D fan

Near the top of the chimney

Anywhere after the I.D. fan

After the I.D. fan

TRUE ANSWER : ?
YOUR ANSWER : ?

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