What is Fuel Combustion Questions with Answers - Set 32 - ObjectiveBooks
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What is Fuel Combustion Questions with Answers - Set 32

Practice Test: Question Set - 32


1. The main product of high temperature carbonization of coal is
    (A) Coke
    (B) Ammonia
    (C) Tar
    (D) Coke oven gas

2. Fussain
    (A) Is friable, charcoal like substance
    (B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal
    (C) Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonization
    (D) All (a), (b) and (c)

3. Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.
    (A) < 120
    (B) > 120
    (C) < 90
    (D) 90-110

4. Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.
    (A) Hydrogenation
    (B) Gasification
    (C) Carbonization
    (D) None of these

5. Kopper-Totzek coal gasifier
    (A) Can give ammonia synthesis gas (H2 + N2)
    (B) Is a moving bed reactor
    (C) Cannot use coking coal
    (D) Operate at very high pressure

6. Gross and net calorific value of a fuel will be the same
    (A) If its ash content is zero
    (B) If its carbon content is very low
    (C) If its hydrogen/hydrogen compound content is zero
    (D) Under no circumstances

7. During its calorific value determination by bomb calorimeter, coal is combusted by
    (A) Air
    (B) Oxygen
    (C) Oxygen enriched air
    (D) None of these

8. Beehive coke oven
    (A) Facilitates by-products recovery
    (B) Takes 2-3 days for coking of coal but requires no external fuel for heating
    (C) Gives larger yield of coke (around 85%) as compared to by-product ovens
    (D) Produces coke with very poor strength

9. High temperature in gasification of coal favours
    (A) High production of CO2
    (B) Low production of CO2
    (C) High production of CO
    (D) Both (b) and (c)

10. Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.
    (A) 500
    (B) 750
    (C) 950
    (D) 1100

11. Assam (India) coals suffers mainly from the disadvantage of high __________ content.
    (A) Ash
    (B) Volatile matter
    (C) Sulphur (4-6%)
    (D) Moisture

12. Higher percentage of ash in coal meant for the production of metallurgical grade coke
    (A) Decreases the hardness of coke
    (B) Decreases the abrasion resistance of coke
    (C) Causes brittleness in steel
    (D) None of these

13. Abel apparatus is used for those oils, whose flash points are _______°F.
    (A) < 120
    (B) > 120
    (C) > 280
    (D) 300-600

14. Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of
    (A) MgO & Na2CO3
    (B) MgSO4 & BaCl2
    (C) BaSO4 & NaCl
    (D) MgCO3 & NaCl

15. Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O)?
    (A) Blast furnace coke
    (B) Low temperature coke
    (C) Anthracite coal
    (D) Sub-bituminous coal

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