FURNACE TECHNOLOGY QUIZ

Specific heating capacity of a furnace is expressed as

Weight heated/hr/furnace volume

None of these

Weight heated/hr

Weight heated/furnace volume

TRUE ANSWER : ?
YOUR ANSWER : ?

Unit of furnace loading is

Ton stock/hr/m² hearth area

Ton stock/hr

Ton stock/m² hearth area

Both B and C

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rotary furnace?

Annealing furnace

Soaking pit

Lime kiln

Stoves

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 non-preheated combustion air

Use of excessive positive draft in the furnace

Use of pulverised solid fuels

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a recuperative furnace?

Reheating furnace

Soaking pit

Coke oven

Steamboiler

TRUE ANSWER : ?
YOUR ANSWER : ?

Decarburisation of steel

Is the removal of carbon from iron carbide (Fe₃C)

Is favoured by CO₂

Affects its crystalline structure

All of these

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In a furnace employing forced draught as compared to induced draught,

None of these

Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced

The fan operates hot and hence blades are liable to corrosion and erosion

Positive pressure exists in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.

Arc

None of these

Low frequency induction

Resistance

TRUE ANSWER : ?
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Recuperator is

Not used for fuel gas preheating

Heavier than regenerator meant for the same duty

An intermittant waste heat recovery equipment

A continuous waste heat recovery equipment

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of pulverised coal in boilers provides

Higher calorific value

Better combustion

Smokeless burning

Less erosion on furnace wall

TRUE ANSWER : ?
YOUR ANSWER : ?