Fuels and Internal Combustion Engines Chemical Questions - Set 18 - ObjectiveBooks

Fuels and Internal Combustion Engines Chemical Questions - Set 18

Practice Test: Question Set - 18

1. Blast furnace coke is made from coal by
    (A) Low temperature carbonization
    (B) High temperature carbonization
    (C) Medium temperature carbonization
    (D) Heating the coal in an oven in presence of air

2. Which of the following petrographic constituents of coal is non-coking?
    (A) Vitrain
    (B) Clarain
    (C) Durain
    (D) Fussain

3. In flue gas analysis by Orsat's apparatus, oxygen is absorbed by
    (A) Potassium hydroxide
    (B) Cuprous chloride
    (C) Alkaline pyrogallol solution
    (D) None of these

4. Power alcohol as compared to straight run gasoline has lower
    (A) Calorific value
    (B) Octane number
    (C) Specific gravity
    (D) Viscosity

5. Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3.
    (A) 2.4
    (B) 1.75
    (C) 0.87
    (D) 11.4

6. Abrasion index of blast furnace coke should be around __________ percent.
    (A) 20
    (B) 35
    (C) 55
    (D) 80

7. Naphthalene is used for making
    (A) Insecticides (e.g. moth balls)
    (B) Unsaturated polyesters
    (C) Drug intermediates e.g. β-naphthol
    (D) All (a), (b) and (c)

8. Pick out the wrong statement.
    (A) Main constituents of LPG are propane and butane
    (B) C.V. of natural gas is about 10000 KCal/Nm3
    (C) C.V. of LPG is about 26000 kcal/Nm3 (11500 kcal/kg)
    (D) L.P.G. is lighter than air

9. Which of the following accounts for maximum energy loss in a boiler?
    (A) Flue gases
    (B) Ash content in the fuel
    (C) Incomplete combustion
    (D) Unburnt carbon in flue gases

10. The calorific value of L.D. converter gas is about __________ Kcal/Nm3.
    (A) 1800
    (B) 800
    (C) 4500
    (D) 10000

11. Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.
    (A) 5
    (B) 25
    (C) 55
    (D) 75

12. Which of the following has the highest heat of combustion?
    (A) H2
    (B) CO
    (C) CH4
    (D) C2H6

13. Anthracite can be used for
    (A) Recarbonising steel
    (B) Making carbon electrodes
    (C) Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
    (D) All (a), (b) and (c)

14. Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
    (A) 3-5
    (B) 25-30
    (C) 60-65
    (D) 95-100

15. Pick out the wrong statement.
    (A) Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal
    (B) Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery
    (C) A high swelling index number of coking coal indicates poor caking properties of coal
    (D) Wash oil is used for scrubbing Benzol from coke oven gas

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