Red Seal Heavy Duty Equipment Technician Practice Exam

What is a common cause of hydraulic system failure?

1. Overheating of hydraulic fluid

2. Contamination of hydraulic fluid

3. Poor design of hydraulic components

4. Lack of hydraulic fluid

The correct answer is: Contamination of hydraulic fluid

Contamination of hydraulic fluid is indeed a common cause of hydraulic system failure because it can lead to several detrimental effects. When foreign particles, dirt, moisture, or other impurities enter the hydraulic system, they can disrupt the fluid's properties and impair its ability to transmit power effectively. Contaminants can also cause wear and tear on hydraulic components, leading to increased friction, decreased efficiency, and ultimately component failure. Regular maintenance, including filtering and monitoring the cleanliness of hydraulic fluid, is crucial in preventing contamination-related issues. This helps to ensure the longevity and reliable operation of the hydraulic system. While overheating of hydraulic fluid, poor design of hydraulic components, and lack of hydraulic fluid can also contribute to system failures, they stem from different factors such as thermal management, engineering practices, and operational procedures. However, contamination directly impacts the fluid itself, making it a significant concern in hydraulic system maintenance and operation.