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Which of the SI engine can be run on biogas?

(a) Diesel engine

(b) Petrol engine

(c) IC engine

(d) External combustion engine

The question was posed to me during an online interview.

This interesting question is from Applications of Biogas & Gasifier topic in section Biomass Energy of Energy Engineering

1 Answer

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Correct answer is (b) Petrol engine

Explanation: Petrol engine can run on biogas, but it is required to be started with petrol in the beginning. Petrol engine can be modified for operation on biogas including provision for entry of biogas, throttling of intake air and advancing ignition timing.

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