Fuel Combustion of Gasoline Chemical Engineering Test - Set 23 - ObjectiveBooks

Fuel Combustion of Gasoline Chemical Engineering Test - Set 23

Practice Test: Question Set - 23

1. Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel)?
    (A) Carburetted water gas
    (B) Blast furnace gas
    (C) Natural gas
    (D) Producers' gas

2. Coke oven gas is a better fuel than blast furnace gas, because of its higher
    (A) Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
    (B) Adiabatic flame temperature
    (C) Heat release rate (thus requiring smaller combustion chamber)
    (D) All (a), (b) and (c)

3. Which of the following has the highest theoretical flame temperature?
    (A) Blast furnace gas
    (B) Hydrogen
    (C) Acetylene
    (D) Coke oven gas

4. A coal containing high amount of volatile matter will have
    (A) Low ignition temperature
    (B) Very little ash content
    (C) High fusion point of its ash
    (D) Low adiabatic flame temperature

5. Which of the following has the highest flame velocity?
    (A) H2
    (B) CO
    (C) CH4
    (D) C2H6

6. High amount of sulphur and phosphorous in coke causes
    (A) Decrease in its calorific value
    (B) Increase in its strength
    (C) Brittleness of steel made by using it
    (D) None of these

7. In Lurgi coal gasifier,
    (A) Coking coals cannot be used
    (B) Low carbon conversion efficiency is achieved
    (C) Entrainment of solids is higher
    (D) Larger quantity of coal can be processed

8. The calorific value of natural gas is about __________ kcal/Nm3.
    (A) 10,000
    (B) 2,500
    (C) 25,000
    (D) 35,000

9. Cannel coal
    (A) Is non-coking
    (B) Has a high volatile matter content and burns with a luminous smoky flame
    (C) Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named
    (D) All (a), (b) and (c)

10. Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.
    (A) 1100
    (B) 1250
    (C) 1350
    (D) 1400

11. Which of the following is not a by-product fuel?
    (A) Pitch
    (B) Blast furnace gas
    (C) Petrol
    (D) Refinery gas

12. Which of the following fuels has the highest calorific value per unit mass (kcal/kg)?
    (A) Coal
    (B) Kerosene
    (C) Natural gas
    (D) Furnace oil

13. Which of the following fuel gases is heavier than air?
    (A) Blast furnace gas
    (B) Coke oven gas
    (C) Natural gas
    (D) Water gas

14. Which adsorbent is used for removing sulphur compounds (S Q, H2S, RSH etc.) removal from coke oven gas in by-products recovery plant?
    (A) Silica gel
    (B) Diatomaceous earth
    (C) Basalt
    (D) Bog iron (i.e., moist ferric hydroxide)

15. Use of pulverized coal in boiler furnace provides
    (A) High calorific value
    (B) Better combustion
    (C) Smokeless burning
    (D) Less erosion on furnace walls

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