Furnace Technology MCQs

Question 1

Very high pressure boilers are usually __________ boilers.

Accepted Answer

Natural circulation

Answer

Fire tube

Answer

Water tube

Answer

Waste heat

Question 2

Recuperator is

Accepted Answer

A continuous waste heat recovery equipment

Answer

Not used for fuel gas preheating

Answer

An intermittant waste heat recovery equipment

Answer

Heavier than regenerator meant for the same duty

Question 3

Ceramic recuperators compared to metallic recuperators for the same duty

Accepted Answer

Occupy more space

Answer

Are lighter

Answer

Are less costly

Answer

Have higher pressure differential between flue gas & air side

Question 4

Regenerators compared to the recuperators for the same duty

Accepted Answer

Occupy more space

Answer

Are less costly

Answer

Are of smaller size

Answer

All of the above

Question 5

Regenerators as compared to recuperators for the same duty

Accepted Answer

Involve higher initial cost

Answer

Store smaller quantity of waste heat

Answer

Are lighter & compact

Answer

All of the above

Question 6

Regenerators are installed in

Accepted Answer

Both A & B

Answer

Coke ovens

Answer

Open hearth furnace

Answer

Neither A nor B

Question 7

Use of pulverised coal in boilers provides

Accepted Answer

Better combustion

Answer

Higher calorific value

Answer

Smokeless burning

Answer

Less erosion on furnace wall

Question 8

Artificial draught produced by a fan in the furnace can be controlled by the

Accepted Answer

All of the above

Answer

Speed of the fan

Answer

Damper

Answer

Variation in the pitch of fan blades

Question 9

Heat transfer rate to the stock/charge in the furnace does not depend upon the

Accepted Answer

Use of waste heat recovery equipments

Answer

Emissivity of the refactory walls

Answer

Size of the furance

Answer

Thickness of the stock