Chemical Engineering - Fuels and Combustion
Exercise :: Fuels and Combustion - Section 1
| 16. |
Pick out the wrong statement. |
| A. |
LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals. | | B. |
The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point. | | C. |
Each ton of petroleum oil on distillation produces about 30-50 Nm3 of gas. | | D. |
Maximum yield of naphthalene is obtained on distillation of crude oil. |
Answer: Option B
Explanation:
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| 17. |
Stack heat losses can be minimised by |
| A. |
controlling the excess air. | | B. |
oxygen enrichment of combustion air. | | C. |
using low c.v. fuels. | | D. |
maintaining proper draft in the furnace. |
Answer: Option A
Explanation:
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| 18. |
Laboratory gas is obtained by the cracking of |
| A. |
gasoline | | B. |
diesel | | C. |
fuel oil | | D. |
kerosene |
Answer: Option D
Explanation:
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| 19. |
Bituminous coal |
| A. |
ignites less easily than anthracite. | | B. |
is generally coking. | | C. |
burns with smoky yellow flame. | | D. |
both (b) and (c). |
Answer: Option D
Explanation:
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| 20. |
Ratio of primary air to secondary air increases with increase in the rank of coal, because the |
| A. |
high rank coals have higher amount of volatile matter. | | B. |
ratio of fixed carbon to volatile matter increases. | | C. |
oxygen content progressively decreases. | | D. |
calorific value of the coal increases. |
Answer: Option B
Explanation:
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