Which instrument gauges should be checked immediately after starting the vehicle's engine?

The most important instruments to check immediately after starting the vehicle's engine include the oil pressure gauge, water temperature gauge, and fuel gauge. These gauges provide critical information about the engine's operational status and the vehicle's readiness for driving.

Monitoring the oil pressure gauge is vital, as low pressure can indicate problems with lubrication, potentially leading to engine damage. The water temperature gauge helps ensure that the engine is not overheating by providing a reading on the coolant temperature. Lastly, the fuel gauge is important for understanding the available fuel level, which is essential for ensuring you can complete your journey without running out of fuel.

The mention of an altimeter in another choice is not relevant for standard vehicle operation and is primarily used in aviation to measure altitude, not for vehicles. Other options may include instruments that are not as crucial for immediate monitoring after engine start, such as brake and tire pressure gauges, which are typically checked before starting the engine or as part of pre-trip inspections to ensure overall vehicle safety.