January 2023

The Petrol engine

By |2022-09-15T12:38:54+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Four Stroke Petrol Engine. Image credit petrolheadkenya.com

Four Stroke Petrol Engine. Image credit petrolheadkenya.com ZIMSEC O Level Combined Science Notes: The Petrol engine
  • Four strokes are involved in the operation of most petrol engines
  • They are thus known as four-stroke engines
  • The first stroke is known as the inlet stroke
  • During the […]

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Efficiency: Diesel vs Petrol engines

By |2022-09-15T12:38:52+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Petrol vs Diesel Engines. Image credit carblogindia.com

Petrol vs Diesel Engines. Image credit carblogindia.com ZIMSEC O Level Combined Science Notes: Efficiency: Diesel vs Petrol engines
  • Efficiency refers to the fuel economy of an engine
  • It measures the amount of chemical energy in the fuel that is converted to kinetic energy
  • The […]

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