Chemical Engineering Fuels in Combustion Reactions - Set 19 - ObjectiveBooks
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Chemical Engineering Fuels in Combustion Reactions - Set 19

Practice Test: Question Set - 19


1. Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain
    (A) CO
    (B) CO2
    (C) H2O
    (D) Both (b) & (c)

2. Froth floatation is used for
    (A) Washing fine coal dust (< 0.5 mm size)
    (B) Washing lump coal (> 80 mm size)
    (C) Removing ash from the coal based on difference in specific gravity of coal and ash
    (D) All (a), (b) and (c)

3. Which of the following has the highest calorific value?
    (A) Lignite
    (B) Sub-bituminous coal
    (C) Anthracite
    (D) Peat

4. Main constituent of natural gas is
    (A) CH4 (upto 90%)
    (B) C2H6
    (C) C3H8
    (D) H2

5. Octane number of 2, 2, 4 - trimethyl pentane is
    (A) 0
    (B) 100
    (C) In between 0 and 100
    (D) More than 100

6. Which of the following fertilizers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant?
    (A) Ammonium sulphate
    (B) Ammonium nitrate
    (C) Ammonium phosphate
    (D) None of these

7. 'Fat' coal means a coal having
    (A) Low calorific value
    (B) High volatile matter
    (C) Low ash content
    (D) Non smoking tendency

8. A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the
    (A) Presence of large quantity of hydrogen in the fuel
    (B) Low calorific value of the fuel
    (C) High sulphur content in the fuel
    (D) Lack of thorough mixing of fuel with air

9. Naphthalene is removed from coke oven gas by
    (A) Scrubbing with wash oil (a petroleum product)
    (B) Adsorbing on bog iron bed
    (C) Absorbing in vetrocoke solution
    (D) None of these

10. (64-132) rank coal (ASTM) means a coal with 64%
    (A) Fixed carbon and having a heating value around 13, 200 BTU/1b
    (B) Ash and heating value around 13, 200 BTU/1b
    (C) Fixed carbon and heating value around 132 BTU/1b
    (D) None of these

11. Tar yield in the low temperature and high temperature carbonization of dry coal may be respectively __________ percent.
    (A) 3 & 10
    (B) 10 & 3
    (C) 10 & 20
    (D) 15 & 8

12. With increases in carbonization temperature
    (A) Coke even gas yield increases
    (B) Tar yield increases
    (C) Hydrogen percentage in the coke oven gas decreases
    (D) Methane percentage in the coke oven gas increases

13. Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind?
    (A) 50
    (B) 70
    (C) 85
    (D) 100

14. Which of the following is a rich fuel gas?
    (A) Producer gas
    (B) Coal gas from underground gasification of coal
    (C) Refinery gases
    (D) None of these

15. Yield of pitch from distillation of high temperature tar is around __________ percent.
    (A) 10
    (B) 25
    (C) 65
    (D) 90

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