Aircraft Hydraulic and Pneumatic Power System

What are the key factors to consider when selecting hydraulic fluids?

• Viscosity, chemical stability, compatibility with materials, and fire resistance.

• Cost-effectiveness, availability, color, and brand reputation.

• Weight, size, ease of use, and manufacturer warranty.

• Temperature range, packaging size, marketing claims, and user reviews.

What is the purpose of hydraulic system flushing?

• To remove contamination and ensure the system operates effectively.

• To increase the pressure in the system.

• To cool down the hydraulic fluid.

• To lubricate the moving parts of the system.

What should be done if an aircraft hydraulic system is serviced with the wrong type of fluid?

• Immediately drain and flush the system and maintain the seals according to the manufacturer’s specifications.

• Leave the system as is and monitor for any issues.

• Add the correct fluid on top of the wrong fluid to dilute it.

• Consult the aircraft manual for further instructions.

What is the role of hydraulic fluid contamination control?

• To maintain system performance and prevent damage to components.

• To increase the viscosity of the hydraulic fluid.

• To reduce the temperature of the hydraulic system.

• To enhance the color of the hydraulic fluid.

What should be done if a hydraulic system is suspected of being contaminated?

• Conduct a contamination check and take appropriate maintenance actions.

• Ignore the issue and continue using the system.

• Replace all hydraulic fluid immediately.

• Perform a visual inspection of the system only.

What is the recommended procedure for handling hydraulic fluids?

• Use proper personal protective equipment, avoid ingestion, and follow safety protocols.

• Always wear a swimsuit when handling fluids.

• Hydraulic fluids can be ingested safely if diluted.

• No special precautions are necessary when handling hydraulic fluids.

What is the recommended action if hydraulic fluid appears clean but may be contaminated?

• Visual inspection is sufficient to ensure safety.

• Fluid samples should be analyzed to determine contamination levels.

• Hydraulic fluid should be replaced immediately.

• No action is necessary if the fluid looks clean.

What is the importance of using the correct hydraulic fluid specified by the manufacturer?

• To assure proper system operation and avoid damage to nonmetallic components.

• To increase the speed of the hydraulic system.

• To reduce the cost of maintenance.

• To improve the aesthetic appearance of the machinery.

What are the learning objectives related to Aircraft Hydraulic Systems?

• Viscosity, Chemical Stability, Flash Point, Fire Point

• Types of Hydraulic Fluids, Intermixing Fluids, Compatibility with Aircraft Materials

• Hydraulic Fluid Contamination, Contamination Check, Contamination Control

• Health & Handling, Hydraulic System Flushing, Fire Point

What is the role of viscosity in hydraulic fluid performance?

• It affects the fluid's ability to flow and provide adequate lubrication and sealing in hydraulic systems.

• It determines the color of the hydraulic fluid.

• It influences the temperature at which the fluid evaporates.

• It has no significant impact on hydraulic systems.