Red Seal Industrial Mechanic (Millwright) Practice Exam

What is a frequent cause of failure in hydraulic systems?

1. Insufficient hydraulic fluid

2. High pressure buildup

3. Contamination of hydraulic fluid

4. Excessive heat generation

The correct answer is: Contamination of hydraulic fluid

Contamination of hydraulic fluid is a frequent cause of failure in hydraulic systems because it can lead to a variety of problems that compromise the system's performance and integrity. Contaminants such as dirt, water, and other particulates can cause wear on hydraulic components, such as pumps, valves, and seals. This wear can result in reduced efficiency, increased friction, and ultimately mechanical failure. In addition, contamination may disrupt the fluid's chemical properties, leading to issues such as foaming, emulsification, and corrosion of system components. These factors can impair the hydraulic system's ability to generate and transmit power effectively, which can ultimately result in system breakdown or malfunction. Therefore, maintaining the cleanliness and quality of hydraulic fluid is essential for the reliable operation of hydraulic systems. Proper filtration and regular maintenance practices can help mitigate the risks associated with fluid contamination.