Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 2

41. 

The main function of a muffle in the muffle furnace is to

A. protect the charge from the effects of the products of combustion.
B. smooth out temperature inequalities on the combustion side of the muffle wall.
C. both (a) & (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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42. 

Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.

A. 50
B. 100
C. 150
D. 250

Answer: Option C

Explanation:

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43. 

Very high pressure boilers are usually __________ boilers.

A. fire tube
B. water tube
C. waste heat
D. natural circulation

Answer: Option D

Explanation:

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44. 

Heat transfer rate to the charge/stock in a furnace does not depend upon the

A. type of fuels viz solid, liquid or gaseous.
B. flue gas temperature.
C. emissivity of refractory walls.
D. initial temperature of the charged stock.

Answer: Option A

Explanation:

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45. 

Heat balance of furnace provides means of determining the

A. thermal efficiency of the process.
B. sources of heat losses.
C. scope of reduction of heat losses.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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