Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 3

1. 

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

A. conduction
B. convection
C. radiation
D. none of these

Answer: Option A

Explanation:

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2. 

In order to maintain an oxidising atmosphere in a furnace, it should have

A. more of excess air
B. less of excess air
C. more of CO in flue gas
D. more of CO2 in flue gas

Answer: Option A

Explanation:

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3. 

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

A. flue gas volume
B. flame temperature
C. fuel consumption
D. stack loss

Answer: Option B

Explanation:

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4. 

Reducing atmosphere is maintained in a

A. calcination kiln
B. blast furnace
C. soaking pit
D. L.D. converter

Answer: Option B

Explanation:

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5. 

Presence of SO2 in furnace gases attacks the ferrous metal by way of

A. accelerating the rate of scaling.
B. causing metal embrittlement.
C. attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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