Chemical Engineering - Furnace Technology

Exercise :: Furnace Technology - Section 2

1. 

Which is a regenerative furnace ?

A. Coke oven heating chamber.
B. Open hearth furnace.
C. Both (a) and (b).
D. Neither (a) nor (b).

Answer: Option C

Explanation:

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2. 

Which of the following accentuates clinker-ing troubles on furnace grate burning coal?

A. Low reactivity of carbonised residue containing high proportion of iron & sulphur.
B. Low forced draft & fuel bed temperature.
C. Thick firebed and preheated primary air.
D. All (a), (b) and (c).

Answer: Option D

Explanation:

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3. 

The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.

A. arc
B. resistance
C. low frequency induction
D. high frequency induction

Answer: Option D

Explanation:

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4. 

Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

A. reduces the flue gas temperature and makes the furnace atmosphere oxidising.
B. increases the load on the induced draft fan.
C. reduces the furnace draught.
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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5. 

Use of pulverised coal in boilers provides

A. higher calorific value
B. better combustion
C. smokeless burning
D. less erosion on furnace wall.

Answer: Option B

Explanation:

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