How long should the oil pressure gauge take to return to normal after starting the engine?

Answer: B — Within seconds

The oil pressure gauge should return to normal within seconds after starting the engine because proper oil circulation is critical for engine lubrication and performance. Upon starting, the oil pump engages and begins circulating oil throughout the engine almost immediately. A rapid response of the gauge indicates that oil is reaching the engine components as expected. If the oil pressure gauge does not show normal levels within a few seconds, it may indicate a problem with oil flow or pressure, which could lead to engine damage if not addressed quickly. Immediate feedback from the oil pressure gauge is essential for ensuring the engine operates smoothly and safely. This is why the correct answer emphasizes a quick return to normal levels.