Fuels Combustion and Environment Question Paper - Set 09 - ObjectiveBooks
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Fuels Combustion and Environment Question Paper - Set 09

Practice Test: Question Set - 09


1. Undercharging of coal in the by-product coke ovens results in
    (A) Decrease in the c.v. of coke oven gas
    (B) Increase in its throughput
    (C) Increase in the c.v. of coke oven gas
    (D) No change in the c.v. of coke oven gas

2. Dry air required to burn 1 kg of carbon completely may be around __________ kg.
    (A) 11
    (B) 2
    (C) 20
    (D) 38

3. Gobar (cow dung) gas is produced by the __________ of cow dung.
    (A) Fermentation
    (B) Oxidation
    (C) Hydrogenation
    (D) None of these

4. Catalyst used in Fischer-Tropsch process is
    (A) Nickel
    (B) Zinc oxide
    (C) Alumina
    (D) Thorium oxide

5. Hard pitch is used for making
    (A) Pulverised fuel
    (B) Perfumes
    (C) Insecticides
    (D) Plastics

6. Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in
    (A) KOH
    (B) Ammoniacal cuprous chloride
    (C) Pyrogallol solution
    (D) None of these

7. Main constituents of Benzol are
    (A) Benzene, toluene & xylene
    (B) Tar & creosote
    (C) Ammonia & phenol
    (D) Anthracene & phenol

8. Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher
    (A) Calorific value
    (B) Higher C/H ratio
    (C) Sulphur content
    (D) Difference in gross & net calorific value

9. Adiabatic flame temperature of a fuel is dependent on the initial temperature of
    (A) Fuel
    (B) Air
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

10. With increase in the oxygen content of the coal, its __________ decreases.
    (A) Calorific value
    (B) Caking power
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

11. Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.
    (A) 1 kg mole
    (B) 22.4 Nm3
    (C) 32 kg
    (D) All (a), (b) and (c)

12. The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm3.
    (A) 5000
    (B) 25,000
    (C) 10,000
    (D) 15,000

13. Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.
    (A) H2O
    (B) CO2
    (C) CO
    (D) CH4

14. Fuel for a nuclear reactor (thermal) is
    (A) Uranium
    (B) Plutonium
    (C) Radium
    (D) None of these

15. The weathering index of a coal
    (A) Gives an idea of the fusion temperature of ash
    (B) Is related to its calorific value
    (C) Is a measure of its size stability, when stored & exposed to weather
    (D) Is a measure of its caking tendency

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