What should you check first under the hood during a pre-trip inspection?

Checking the engine oil level first during a pre-trip inspection is essential as it provides crucial information about the engine's health and performance. The engine oil lubricates moving parts, reduces friction, and helps to prevent overheating. Insufficient oil can lead to severe engine damage, including seizures or complete engine failure. By verifying the oil level early in the inspection, you ensure that the oil is at the appropriate level, mitigating the risk of mechanical issues during operation.

While it is important to check the other components like battery terminals, radiator fluid, and transmission fluid levels, starting with the engine oil establishes a solid check on the engine’s ability to run efficiently and safely. Each of the other checks has its own significance, but ensuring adequate lubrication through the oil level is foundational for overall vehicle operation.