Fuel Cell and Hydrogen Combustion Engine Practice Questions - Set 15 - ObjectiveBooks
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Fuel Cell and Hydrogen Combustion Engine Practice Questions - Set 15

Practice Test: Question Set - 15


1. Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in
    (A) Air
    (B) Oxygen
    (C) Either (a) or (b)
    (D) Either (a) or (b) without gain or loss of heat

2. Low temperature oxidation of coal resulting from bad storage conditions does not decrease its
    (A) Caking power
    (B) Calorific value
    (C) Hydrogen content
    (D) Oxygen content

3. Low temperature oxidation of coal during storage does not decrease its
    (A) Oxygen content
    (B) Caking power
    (C) Calorific value
    (D) None of these

4. High ash containing coke
    (A) Produces more slag when used in the blast furnace
    (B) Has poor strength and abrasion resistance
    (C) Is desirable in producer gas manufacture
    (D) None of these

5. Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.
    (A) 1000
    (B) 4000
    (C) 8000
    (D) 15000

6. Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas?
    (A) Blast furnace gas
    (B) Natural gas
    (C) Producer gas
    (D) Water gas

7. The catalyst used in shift converter is
    (A) Nickel
    (B) Vanadium
    (C) Silica gel
    (D) Alumina

8. A coal with high __________ content, would ignite most easily.
    (A) Fixed carbon
    (B) Volatile matter
    (C) Ash
    (D) Oxygen

9. With increase in the temperature of carbonization of coal
    (A) Hydrogen content of coke oven gas increases due to cracking of hydrocarbons
    (B) Methane content in the coke oven gas decreases and carbon monoxide content increases
    (C) Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H2 content
    (D) All (a), (b) and (c)

10. Fuel combustion is never cent per cent efficient due to
    (A) Incomplete combustion
    (B) Dry gas/stack gas loss
    (C) Moisture loss
    (D) All (a), (b) and (c)

11. Volatile matter content in coking coal may be about __________ percent.
    (A) 1
    (B) 7
    (C) 22
    (D) 46

12. Pick out the wrong statement.
    (A) Percentage of ash in coke produced from medium coking coal is more than that in coal
    (B) The calorific value (kcal/Nm3) of coke oven gas reduces on removal of hydrogen from it by cryogenic method
    (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification
    (D) Coal based fertilizer plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification

13. The maximum adiabatic flame temperature is attained, when the fuel is burnt with
    (A) Theoretically required amount of air
    (B) More than theoretically required amount of air
    (C) Less than theoretically required amount of air
    (D) Theoretically required amount of oxygen

14. Degree of carbonization of coal during coke making can be roughly judged by the __________ of the coke produced.
    (A) Color
    (B) Moisture content
    (C) Ash content
    (D) Volatile matter

15. Atomizing steam to fuel oil ratio in a burner should be around
    (A) 0.5
    (B) 1.5
    (C) 2.5
    (D) 3.5

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