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Compression testing measures the ability of an engine to compress its air-fuel mixture properly. This compression is crucial for the engine to operate efficiently and effectively. When you pull the starter rope on a small engine, the piston moves down the cylinder, allowing air and fuel to enter the combustion chamber. As the piston moves back up, it compresses this mixture. The higher the compression, the more power the engine can produce.


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Resistors are one of the most fundamental electrical components. They limit the flow of electric current and are measured in ohms. Resistors are critical for controlling voltage and current levels in circuits, ensuring that delicate components do not receive excessive power that could lead to damage. For example, in a simple LED circuit, resistors protect the LED by limiting the amount of current that flows through it, thus extending its lifespan.


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