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  1. #1
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    Default which one is correct?

    Jet propulsion involves ____________ of air and fuel, which forms a powerful exhuat.

    1. a mixture of igniting
    2. the ignition of a mixture

    are both correct?

    Thanks,

  2. #2
    BobK's Avatar
    BobK is offline Harmless drudge
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    Default Re: which one is correct?

    The words 'of air and fuel' require a noun to precede them. You could talk about 'the igniting of [a mixture of] air and fuel', or you could just stick with no. 2.

    b

  3. #3
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    Default Re: which one is correct?

    Additionally,

    Jet propulsion involves (1) a mixture of igniting of air and fuel, which forms a powerful exhuast.

    Jet propulsion involves (2) the ignition of a mixture of air and fuel, which forms a powerful exhuast.


    From Google:
    • Ignition of a mixture of air and fuel vapor can only ...
    • ... functioning on the principle of spark-ignition of a mixture of air and fuel.
    • the present invention provides for the thermal ignition of a mixture of air and fuel in a low-pressure ...
    • a controller to operate the engine to perform spark ignition of a mixture of air and fuel in said cylinder during an engine cold start, ...

  4. #4
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    Default Re: which one is correct?

    Thanks Bob and Casiopea.

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