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Chemical Engineering :: Fuels and Combustion

  1. __________ present in coal is not determined in its ultimate analysis.

  2. A.
    Fixed carbon
    B.
    Total carbon
    C.
    Hydrogen
    D.
    Nitrogen.

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  3. The calorific value of L.D. converter gas is about __________ Kcal/Nm3 .

  4. A.
    1800
    B.
    800
    C.
    4500
    D.
    10000

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  5. __________ prohibits the use of alcohols directly in petrol engines.

  6. A.
    Low octane number
    B.
    High cost & availability
    C.
    Low flash point
    D.
    Low calorific value

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  7. Higher fuel combustion efficiency can not be achieved by

  8. A.
    preheating of fuel gases & combustion air.
    B.
    reducing sulphur content in the fuel.
    C.
    adopting proper fuel firing technique & fuel preparation.
    D.
    supplying correct amount of combustion air.

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  9. With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion

  10. A.
    increases
    B.
    decreases
    C.
    remains same
    D.
    either (a) or (b), depends on other factors

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  11. Which of the following is the maximum coal producing state in India ?

  12. A.
    Orissa
    B.
    West Bengal
    C.
    Jharkhand
    D.
    Assam

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  13. Height of coke oven is limited (say maximum upto 7 metres) mainly by the

  14. A.
    problem of uniform heating along its height.
    B.
    structural strength of silica bricks.
    C.
    problem in door cleaning.
    D.
    buckling of ram of pusher car at the time of coke pushing.

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  15. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of

  16. A.
    pitch
    B.
    fuel oil
    C.
    blast furnace gas
    D.
    bituminous coal

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  17. The hottest part of the flame lies in its____zone.

  18. A.
    non-luminous
    B.
    luminous
    C.
    yellow
    D.
    unburnt gases

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  19. Bunsen burner is an example of a/an __________ burner.

  20. A.
    inside mixing/premix type
    B.
    outside mixing/diffusion flame/nozzle mix type.
    C.
    rotary cup.
    D.
    submerged combustion.

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