Which parameters are typically checked during engine testing?

The chosen answer highlights key parameters that are critical for ensuring the proper performance and safety of an engine during testing. Engine speeds, temperatures, fuel flow, and oil pressure are vital metrics that engineers monitor closely.

Engine speeds indicate how well the engine is performing at various power levels, allowing for assessment of its responsiveness and efficiency. Monitoring temperatures is crucial as it helps in confirming that the engine is not overheating, which could lead to damage or failure. Fuel flow measurements ensure that the engine is receiving the correct amount of fuel, which is essential for maintaining optimal performance and preventing issues like inefficient combustion. Lastly, oil pressure is monitored to ensure proper lubrication, which is necessary for preventing wear and tear on the engine components.

These parameters together provide a comprehensive overview of the engine's operational health and are standard in most testing protocols. The other options, while they may include relevant aspects of engine maintenance or inspection, do not encompass the critical performance metrics assessed during engine testing.