Chemical Engineering - Automotive Fuels Gasoline and Diesel Combustion - Set 08 - ObjectiveBooks

Chemical Engineering - Automotive Fuels Gasoline and Diesel Combustion - Set 08

Practice Test: Question Set - 08

1. Which of the following fuels is the best for burning on chain grate stoker?
    (A) Non-caking coal
    (B) Caking coal
    (C) Coking coal
    (D) Pulverized coal

2. Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.
    (A) Sensible
    (B) Latent
    (C) Sensible and latent
    (D) None of these

3. Pick out the correct statement.
    (A) Oxygen content decreases from lignite to bituminous coal as the coalification increases
    (B) The less the oxygen content, better is the coal, as it reduces the calorific value
    (C) With increase in oxygen content, moisture holding capacity of coal increases and the caking power decreases
    (D) All (a), (b) and (c)

4. In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by
    (A) Potassium hydroxide
    (B) Dilute potassium carbonate
    (C) Cuprous chloride
    (D) Alkaline pyrogallol solution

5. Desirable "Micum Index" values of metallurgical coke are
    (A) M40 > 78% and M10 < 10%
    (B) M40 > 4% and M10 < 80%
    (C) M40 > 10% and M10 < 78%
    (D) M40 > 98% and M10 < 2%

6. Fischer-Tropsch method aims at the
    (A) Gasification of coal
    (B) Synthesis of gasoline (from water gas)
    (C) Hydrogenation of coal to produce gasoline
    (D) None of these

7. The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to
    (A) Minimize its corrosion
    (B) Avoid radiation heat loss
    (C) Make it look attractive
    (D) None of these

8. About __________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO.
    (A) 2
    (B) 3
    (C) 4
    (D) 5

9. Advantages of fluidized bed combustion are
    (A) Reduced NOx formation in flue gas
    (B) Lower furnace operating temperature
    (C) High heat transfer rate
    (D) All (a), (b) & (c)

10. Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
    (A) 1000
    (B) 4000
    (C) 6000
    (D) 8000

11. Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
    (A) Decolorization of sugar
    (B) Solvent recovery from air and gases
    (C) Absorption of gases and vapor
    (D) Electrode manufacture

12. Pulverized coal used in boiler firing need not have
    (A) Less moisture content
    (B) High fusion point of its ash
    (C) High bulk density
    (D) Lower ash content

13. With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion
    (A) Increases
    (B) Decreases
    (C) Remain same
    (D) Either (a) or (b), depends on other factors

14. Benzol is used
    (A) As a motor fuel blend
    (B) For producing benzene, toluene & xylene by its distillation
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

15. 'Fat coals' are those coals which have very high
    (A) Caking capacity
    (B) Volatile matter content
    (C) Fusion point of its ash
    (D) Inherent moisture content

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