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Fuels and Combustion

1 UPSC Prelims MCQs tagged "Fuels and Combustion". Free practice with answer keys, explanations, and timed mock tests on Anantam IAS.

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  1. Consider the following statements regarding the comparison of PNG (Piped Natural Gas) and LPG…

    Consider the following statements regarding the comparison of PNG (Piped Natural Gas) and LPG (Liquefied Petroleum Gas):

    1. AOnly 1 and 2
    2. BOnly 1 and 3
    3. COnly 2 and 3
    4. D1, 2 and 3
    Answer and explanation

    Correct answer: B

    PNG is mostly methane, which is lighter than air and disperses upward on leakage, while LPG is heavier and pools near the ground, so statement 1 holds. PNG is also supplied at much lower pressure than LPG cylinders, so statement 3 holds. Statement 2 is the trap: the blanket claim that PNG "always" gives more energy per unit weight than LPG is false, since LPG is the more energy-rich domestic fuel.

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    Science & Technology UPSC GPSC-2026 Medium