FURNACE TECHNOLOGY QUIZ

Regenerators compared to the recuperators for the same duty

All of these

Are less costly

Are of smaller size

Occupy more space

TRUE ANSWER : ?
YOUR ANSWER : ?

Recuperator is

Heavier than regenerator meant for the same duty

A continuous waste heat recovery equipment

An intermittant waste heat recovery equipment

Not used for fuel gas preheating

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs natural draft?

Coke oven

Boiler

Rotary kilns

L.D. converter

TRUE ANSWER : ?
YOUR ANSWER : ?

Cement Kiln is a

Tunnel Kiln

Batch furnace

Natural draft furnace

Rotary Kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are used for waste heat recovery in

Soaking pits

By-product coke ovens

Beehive coke oven

Blast furnace stoves

TRUE ANSWER : ?
YOUR ANSWER : ?

Scaling of furnace stock is reduced by __________ in flue gas.

All of these

High CO/CO₂

H₂

CO

TRUE ANSWER : ?
YOUR ANSWER : ?

In practical operation of any furnace, zero oxygen percentage or theoretical CO₂ percentage in flue gas is rarely achieved, because of

Imperfect mixing of fuel & air and infiltration of air

Use of excessive positive draft in the furnace

Use of non-preheated combustion air

Use of pulverised solid fuels

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

85

15

40

70

TRUE ANSWER : ?
YOUR ANSWER : ?

While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.

4500

3000

6000

2000

TRUE ANSWER : ?
YOUR ANSWER : ?

Very high pressure boilers are usually __________ boilers.

Water tube

Waste heat

Fire tube

Natural circulation

TRUE ANSWER : ?
YOUR ANSWER : ?

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