If the oil pressure gauge is inoperative, can you continue with the flight?

The correct answer is that you cannot continue the flight if the oil pressure gauge is inoperative. This gauge is critical for monitoring the engine's oil pressure, which ensures that the engine is properly lubricated. If the oil pressure drops below safe levels, it can lead to engine damage or failure due to inadequate lubrication. Since the pilot relies on the oil pressure gauge to assess the engine's health during flight, an inoperative gauge compromises safety and can pose significant risks.

Other options might suggest that if other gauges are normal or if the engine starts, it could be acceptable to proceed. However, this does not take into account the essential role of the oil pressure gauge in engine operation. A malfunctioning oil pressure gauge could indicate serious underlying issues that are not visible through other instruments, making it essential for the gauge to be functioning before takeoff.