Question 63Motor Plants - QMED

The correct answer is B) feeler gage. Feeler gages are the appropriate tool to detect any misalignment between the drive shaft and propeller shaft flanges. By inserting the feeler gage between the flanges, you can measure the gap and identify any discrepancy from the recommended alignment tolerances specified by the manufacturer. This allows you to make the necessary adjustments to ensure proper shaft alignment and prevent premature wear or failure of the shaft components. The other options, such as an inside micrometer, adjustable trammel, or sighting device, are not the ideal tools for this specific task of measuring shaft flange alignment. Feeler gages are the standard and recommended method as prescribed in the US Coast Guard Captain's License Examination guidelines.