Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 1

26. 

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of

A. graphite powder
B. thoria
C. zircon powder
D. beryllium

Answer: Option C

Explanation:

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27. 

In reverberatory furnace, charge is heated mainly by

A. conduction.
B. natural convection.
C. radiation of heat from the roof of the combustion chamber.
D. none of these.

Answer: Option C

Explanation:

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28. 

An example of a periodic furnace is the

A. blast furnace stoves
B. blast furnace
C. coke oven heating chamber
D. rotary kilns

Answer: Option A

Explanation:

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29. 

Ostwald charts are meant for

A. computing the excess/deficiency of combustion air.
B. calculation of flue gas temperature.
C. computation of flue gas analysis.
D. none of these.

Answer: Option A

Explanation:

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30. 

Maximum heat transfer in high temperature furnaces is by

A. conduction
B. convection
C. radiation
D. either (a), (b) or (c); depends on the type of furnace

Answer: Option C

Explanation:

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