FURNACE TECHNOLOGY QUIZ

In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?

Recuperator

Waste heat boiler

None of these

Regenerator

TRUE ANSWER : ?
YOUR ANSWER : ?

Ceramic recuperators compared to metallic recuperators for the same duty

Are lighter

Occupy more space

Are less costly

Have higher pressure differential between flue gas & air side

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Oxidation/scaling

Sulphur penetration

Decarburising

Either of the above

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal efficiency of furnaces can be improved by

All of these

Maintaining proper draught

Waste heat recovery from flue gas

Minimising heat losses from furnace walls

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are used for waste heat recovery in

Beehive coke oven

Blast furnace stoves

Soaking pits

By-product coke ovens

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a recuperative furnace?

Coke oven

Steamboiler

Soaking pit

Reheating furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Recuperator is

Heavier than regenerator meant for the same duty

An intermittant waste heat recovery equipment

Not used for fuel gas preheating

A continuous waste heat recovery equipment

TRUE ANSWER : ?
YOUR ANSWER : ?

The heating capacity of muffle furnace depends on the

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

Surface area & emissivity of the stock

Both A & B

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs preheating, heating and soaking zones?

Cupola

Soaking pit

Open hearth furnace

Reheating furnace

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

All of these

Physical nature, ash content and fineness of the coal

Type of burner and combustion chamber

TRUE ANSWER : ?
YOUR ANSWER : ?