Question: 9 . True / False: Diesel particulate filters ( DPFs ) are designed to capture and remove particulate matter ( PM ) from the exhaust

9. True/False: Diesel particulate filters (DPFs) are designed to capture and remove particulate matter (PM) from the exhaust stream of diesel engines.
10. True/False: Higher compression ratios in engines generally lead to decreased thermal efficiency and increased likelihood of engine knocking.

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