FURNACE TECHNOLOGY QUIZ

In salt bath furnace, heat is transferred to the charge mainly by

None of these

Radiation

Conduction

Convection

TRUE ANSWER : ?
YOUR ANSWER : ?

Rotary kilns are used in the

Calcination of limestone & dolomite

Both A and B

Cement manufacture

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

None of these

Fine dolomite

Alkaline powders

Ammonia

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Oxidation/scaling

Decarburising

Either of the above

Sulphur penetration

TRUE ANSWER : ?
YOUR ANSWER : ?

hich is the most thermally efficient furnace?

Reverberatory furnace

Boiler furnace

Reheating furnace

Rotary kilns

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

Soaking pit

Sintering machine

Beehive oven

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Shaft

Rotary hearth

Tunnel

Walking beam

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?

Excessive fly ash discharge from the stack

Erosion of induced draft fan blades

Ash disposal problem

Higher power consumption in its transportation

TRUE ANSWER : ?
YOUR ANSWER : ?

Soaking pits are meant for heating steel

Sheets

Coils

Slabs

Ingots

TRUE ANSWER : ?
YOUR ANSWER : ?

The reason for excessive clinker formation in gas producers is the

All of these

Development of hot spots in the fuel bed and an abnormally high rate of gasification

Use of fuel having too low an ash fusion temperature

Use of coal/coke containing a high % of fines and ash

TRUE ANSWER : ?
YOUR ANSWER : ?