Hydraulic Systems

What is the most common single hydraulic system used in small GA aircraft today?

Which of the following is not a common hydraulic application in the aerospace industry?

• Landing gear

• Brakes

• Flight control surfaces

• Cooling systems

Which component in a hydraulic system is responsible for maintaining fluid cleanliness?

• Accumulator

• Filter

• Pump

• Reservoir

Which type of hydraulic fluid is typically used in environmentally sensitive areas?

• Mineral oil-based fluid

• Water-glycol fluid

• Biodegradable fluid

• Synthetic fluid

• 20 psi

• 30 psi

• 21 psi

• 20 pounds 

Which component in a hydraulic power pack is responsible for controlling the direction of fluid flow?

• Reservoir

• Directional control valve

• Accumulator

• Filter

What is the primary function of an accumulator in a hydraulic system?

• To store hydraulic fluid

• To absorb shock and maintain pressure

• To filter contaminants

• To regulate temperature

What is the main method for removing system contamination in a fluid power system?

• Using filters and strainers

• Inspecting service indicator

• Measuring pressure using Psig

• Changing the hydraulic fittings

What is the primary difference between single action and double action hydraulic actuators?

• Single action actuators use hydraulic fluid for both extending and retracting, while double action actuators use it only for extending.

• Single action actuators use hydraulic fluid only for extending, while double action actuators use it for both extending and retracting.

• Single action actuators are used in pneumatic systems, while double action actuators are used in hydraulic systems.

• Single action actuators are larger than double action actuators.

How does a selector valve differ from a check valve?

• Selector valves control the direction of flow, while check valves prevent backflow

• Selector valves are used in pneumatic systems, while check valves are used in hydraulic systems

• Selector valves are larger than check valves

• Selector valves are used to store energy, while check valves are used to release energy