Automotive Fuels and Combustion Chemical MCQs - Set 04 - ObjectiveBooks

Automotive Fuels and Combustion Chemical MCQs - Set 04

Practice Test: Question Set - 04

1. Mott and Wheeler test is conducted on coke to find its
    (A) Reactivity with O2
    (B) Abradability
    (C) Phosphorus content
    (D) Volatile matter content

2. The main advantage of forced draft over natural draft is that
    (A) Combustion of fuel is complete
    (B) Smaller height chimney can be used
    (C) Furnace control is easier
    (D) All (a), (b) & (c)

3. Coal is pulverized before burning in large capacity boiler furnaces mainly to
    (A) Ensure its complete combustion
    (B) Facilitate easy ash removal
    (C) Enhance its calorific value
    (D) Provide trouble free operation

4. If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be
    (A) Low
    (B) High
    (C) Very high, if the fuel is of low calorific value
    (D) None of these

5. Laboratory gas is obtained by the cracking of
    (A) Gasoline
    (B) Diesel
    (C) Fuel oil
    (D) Kerosene

6. Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if
    (A) It contains large amount of volatile matter
    (B) It is stored in tall heaps
    (C) Smaller fines are stored in large quantity
    (D) All (a), (b) and (c)

7. 'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.
    (A) 2.5
    (B) 7.5
    (C) 10.5
    (D) 14.5

8. The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always
    (A) 1
    (B) < 1
    (C) > 1
    (D) Unpredictable

9. Caking index of the coal blend used for the manufacture of metallurgical coke should be around
    (A) 5
    (B) 21
    (C) 40
    (D) 48

10. Coalification means the
    (A) Process of conversion of lignite into anthracite
    (B) Underground gasification of coal
    (C) Complete combustion of coal
    (D) Direct hydrogenation of coal

11. Main constituent of the gas produced from a gobar (cow dung) gas plant is
    (A) CO2
    (B) CH4
    (C) H2
    (D) CO

12. Washing of coal
    (A) Reduces its ash & sulphur content
    (B) Improves its coking properties
    (C) Increase the fusion point of its ash by removing chlorine compounds
    (D) All (a), (b) and (c)

13. Cannel coal and boghead coal are the examples of
    (A) Humic coals
    (B) Liptobiolites
    (C) Sapropelic coals
    (D) None of these

14. Bituminous coal
    (A) Ignites less easily than anthracite
    (B) Is generally coking
    (C) Burns with smoky yellow flame
    (D) Both (b) and (c)

15. Which of the following is not endothermic?
    (A) Cracking
    (B) Reforming
    (C) Gasification
    (D) Partial oxidation

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