Furnace Technology MCQs

Question 1

Blast furnace stoves are meant for heating

Accepted Answer

Air

Answer

Blast furnace gas

Answer

Steam

Answer

None of these

Question 2

Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

Accepted Answer

Increasing the draft in the furnace

Answer

Preheating the fuel gas

Answer

Oxygen enrichment of combustion air

Answer

Preheating the combustion air

Question 3

Neutral atmosphere is maintained in a/an __________ furnace.

Accepted Answer

Cold rolled steel coil annealing

Answer

Open hearth

Answer

Soaking pit

Answer

Walking beam reheating

Question 4

The method of Lobo and Evans is concerned with the calculation of the

Accepted Answer

Heat absorption in radiant section of a furnace

Answer

Heat transfer by forced convection in a reboiler

Answer

Heat transfer in vacuum condensers

Answer

Mass transfer co-efficient

Question 5

Pulverised fuel fired furnaces employ __________ fuel firing.

Accepted Answer

All of the above

Answer

Horizontal

Answer

Vertical

Answer

Tangential

Question 6

Combustion of fuel in a furnace with oxygen enriched air results in higher

Accepted Answer

Flame temperature

Answer

Flue gas volume

Answer

Fuel consumption

Answer

Stack loss

Question 7

Reverberatory furnace is used for

Accepted Answer

Roasting/reduction of ores

Answer

Annealing steel coil

Answer

Heating air

Answer

Steel melting

Question 8

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

Accepted Answer

Ash disposal problem

Answer

Excessive fly ash discharge from the stack

Answer

Higher power consumption in its transportation

Answer

Erosion of induced draft fan blades

Question 9

Circulation of gases in furnace is caused by the

Accepted Answer

All of the above

Answer

Change in volume during a change of temperature

Answer

Difference in density between hot and cold gases

Answer

Furnace pressure in conjunction with draft in flues