Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 2

21. 

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

A. heat absorption in radiant section of a furnace.
B. heat transfer by forced convection in a reboiler.
C. heat transfer in vacuum condensers.
D. mass transfer co-efficient.

Answer: Option A

Explanation:

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22. 

Reverberatory furnace is used for

A. roasting/reduction of ores
B. annealing steel coil
C. heating air
D. steel melting

Answer: Option A

Explanation:

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23. 

Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.

A. 10-15
B. 25-30
C. 45-50
D. 65-70

Answer: Option B

Explanation:

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24. 

In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by

A. conduction
B. convection
C. radiation
D. can not be predicted.

Answer: Option C

Explanation:

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25. 

Which of the following is a directly fired intermittant furnace ?

A. Walking beam reheating furnace
B. Reverberatory furnace
C. Tower furnace
D. Tunnel kiln

Answer: Option B

Explanation:

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