GATE AG 2018 • Q19 MCQ • 1 Mark

Section 3: Farm Power

Sources of Power

Subtopic: Sources of power on the farm – human, animal, mechanical, electrical, wind, solar and biomass

Question Statement:

Constituents of the producer gas contributing to its heating value are

Options:

  • (A) CO and CO₂
  • (B) CH₄ and CO₂
  • (C) CO and H₂
  • (D) CO₂ and H₂

Official Answer Key:

C

Step-by-Step Solution & Explanation

Producer gas typically contains CO (~20 %), H₂ (~15 %), CH₄ (~2 %), CO₂ (~10 %) and N₂ (balance). CO₂ and N₂ are fully oxidised/inert and contribute nothing to the calorific value. The combustible constituents carrying essentially all the heating value are CO and H₂ (CH₄ is present only in traces).

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