Furnace Technology MCQs

Question 1

In practical operation of any furnace, zero oxygen percentage or theoretical CO 2 percentage in flue gas is rarely achieved, because of

Accepted Answer

Imperfect mixing of fuel & air and infiltration of air

Answer

Use of non-preheated combustion air

Answer

Use of pulverised solid fuels

Answer

Use of excessive positive draft in the furnace

Question 2

Presence of SO 2 in furnace gases attacks the ferrous metal by way of

Accepted Answer

All of the above

Answer

Accelerating the rate of scaling

Answer

Causing metal embrittlement

Answer

Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature

Question 3

Unit of furnace loading is

Accepted Answer

Ton stock/hr/m 2 hearth area

Answer

Ton stock/hr

Answer

Ton stock/m 2 hearth area

Answer

Both B and C