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Northern IrelandMotor Vehicle & Road User StudiesQuick questions
The motor vehicle: engine and systems
Quick questions on The fuel system and combustion - CCEA GCSE MVRUS
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the air filter?Show answer
The air filter cleans the air entering the engine, trapping dust and grit so they cannot enter the cylinders and cause wear. A blocked air filter restricts airflow, making the mixture too rich and harming performance and economy.
What is the exhaust system?Show answer
After combustion, the exhaust system carries the burnt gases away from the engine, quietening the noise through the silencer (muffler). The gases are mainly carbon dioxide and water vapour, plus pollutants - carbon monoxide, oxides of nitrogen and unburnt hydrocarbons. A catalytic converter in the exhaust reduces these harmful gases.
What is q1?Show answer
What two things are mixed to form the combustible mixture? [1 mark]
What is q2?Show answer
What does the air filter do? [1 mark]
What is q3?Show answer
Name one advantage of fuel injection over a carburettor. [1 mark]
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