Day 1 Progress Check Flashcards
What role does a hydraulic accumulator play in an aircraft hydraulic system?
It stores fluid to maintain pressure during system operation
What could happen if hydraulic fluid is too thick for the system?
Higher power loss and elevated temperatures
Why is maintaining proper hydraulic fluid viscosity crucial for the performance of pumps, valves, and pistons?
It balances fluid flow without power loss or overheating
What happens to hydraulic fluid when it reaches its flash point?
The vapor momentarily ignites when exposed to flame
Which hydraulic fluid type is known for its fire-resistant properties and is widely used in commercial transport aircraft?
Phosphate ester-based fluid
How does a hydraulic fluid’s chemical stability affect system performance?
It prevents the formation of deposits and sludge
What is the primary purpose of hydraulic fluid in an aircraft’s hydraulic system?
To transmit and distribute forces
Why is it important to balance the viscosity of hydraulic fluid?
It ensures fluidity and proper sealing
How does improper chemical stability in hydraulic fluid manifest in the system?
Sludge and carbon deposits form in the system
What safety precaution is essential when handling phosphate ester-based hydraulic fluids?
Wearing gloves and avoiding skin contact
What is the main drawback of phosphate ester-based hydraulic fluids?
Susceptibility to water contamination
What effect does low viscosity have on hydraulic system components?
Accelerated wear of moving parts
Which law explains the principle of pressure transmission in hydraulic systems?
Pascal’s Law
What type of hydraulic fluid was developed to address fire risks in aircraft hydraulic brakes after WWII?
Phosphate ester-based fluid
Which property of hydraulic fluid is most affected by temperature changes?
Viscosity
