Red Seal Industrial Mechanic (Millwright) Practice Exam

What would be a common sign that indicates hydraulic system performance is decreasing?

1. Increased pressure readings.

2. Fluid temperature rising steadily.

3. Unusual noises coming from the system.

4. Consistent performance metrics over time.

The correct answer is: Unusual noises coming from the system.

The presence of unusual noises coming from a hydraulic system is a significant indicator of decreasing performance. These noises can stem from various issues such as cavitation, low fluid levels, or malfunctioning components, all of which can disrupt the normal operation of the system. Noises can indicate that parts are wearing out, that there is excessive strain, or that there are pressures or flows that are not within the operational parameters. Recognizing these auditory cues allows for early detection of problems that, if addressed promptly, can prevent system failures and costly repairs. Increased pressure readings typically suggest that a system is functioning well, possibly even experiencing hydraulic lock or blockages, instead of indicating performance deterioration. A rising fluid temperature could point to some level of inefficiency in the system, but it is not always the most direct sign of decreased performance, as various factors can influence temperature without directly compromising efficiency. Consistent performance metrics over time suggest stability rather than decline in performance, indicating that the system is operating as expected without significant fluctuations.