Furnace Technology MCQs

Question 1

Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of

Accepted Answer

Blast furnace gas with air

Answer

Furnace oil with air

Answer

Furnace oil with oxygen

Answer

Blast furnace gas with oxygen

Question 2

Protective gas used in the annealing furnace for steel coil comprises of

Accepted Answer

95% N2 + 5% H2

Answer

5% H2 + 95% N2

Answer

100% CO

Answer

100% H2

Question 3

__________ furnace is not an electric furnace.

Accepted Answer

Pot

Answer

Arc

Answer

Induction

Answer

Resistance

Question 4

In reverberatory furnace, charge is heated mainly by

Accepted Answer

Radiation of heat from the roof of the combustion chamber

Answer

Conduction

Answer

Natural convection

Answer

None of these

Question 5

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

Accepted Answer

All of the above

Answer

CO

Answer

H2

Answer

High CO/CO2

Question 6

Cement Kiln is a

Accepted Answer

Rotary Kiln

Answer

Tunnel Kiln

Answer

Natural draft furnace

Answer

Batch furnace

Question 7

Which is a regenerative furnace?

Accepted Answer

Both A and B

Answer

Coke oven heating chamber

Answer

Open hearth furnace

Answer

Neither A nor B

Question 8

Dampers are located

Accepted Answer

Before the I.D fan

Answer

After the I.D. fan

Answer

Near the top of the chimney

Answer

Anywhere after the I.D. fan

Question 9

Decarburisation of steel

Accepted Answer

All of the above

Answer

Is the removal of carbon from iron carbide (Fe3C)

Answer

Affects its crystalline structure

Answer

Is favoured by CO2