FUELS AND COMBUSTION QUIZ

Which of the following is a periodic furnace?

Rotary kiln

Tunnel kiln

Soaking pit

Reheating furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Metallic recuperator

Ceramic recuperator

None of these

Regenerator

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Sintering machine

Soaking pit

Beehive oven

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Neutral atmosphere is maintained in a/an __________ furnace.

Cold rolled steel coil annealing

Open hearth

Walking beam reheating

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal efficiency of an open hearth furnace may be about __________ percent.

50

20

80

5

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Tunnel

Walking beam

Shaft

Rotary hearth

TRUE ANSWER : ?
YOUR ANSWER : ?

The heating capacity of muffle furnace depends on the

Neither A nor B

Both A & B

Properties of the muffle wall (temperature, area, emissivity)

Surface area & emissivity of the stock

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat recoverable from flue gases of furnaces depends on the

All of these

Flue gas temperature drop through the furnace

Thermal efficiency of furnace

Quantity of flue gases

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Continuous furnace

Updraft kiln

Muffle furnace

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

< 10

< 8

< 5

< 2

TRUE ANSWER : ?
YOUR ANSWER : ?

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