Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 1

21. 

Fuel used in B.F. stove is

A. pulverised coal
B. furnace oil
C. blast furnace gas/mixed gas
D. coke oven gas

Answer: Option C

Explanation:

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22. 

Tunnel kilns are usually used for

A. roasting of pyrites.
B. drying/tempering of refractories.
C. reheating of slabs.
D. melting of glass.

Answer: Option B

Explanation:

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23. 

The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

A. 15
B. 40
C. 70
D. 85

Answer: Option B

Explanation:

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24. 

Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

A. increasing the draft in the furnace.
B. preheating the fuel gas.
C. oxygen enrichment of combustion air.
D. preheating the combustion air.

Answer: Option A

Explanation:

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25. 

Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

A. preheating the combustion air.
B. oxygen enrichment of combustion air.
C. preheating the fuel gas.
D. all (a), (b) & (c).

Answer: Option D

Explanation:

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