Aircraft Fluid Lines PREL

What are aircraft fluid lines typically made of?

• Rubber

• Metal tubing or flexible hose

• PVC

• Glass

Where are metal tubing lines typically used?

• In moving parts

• In low-pressure systems

• In stationary applications

• In fire zones

What is the main advantage of using flexible hose?

• It is cheaper than metal tubing

• It is stronger than metal tubing

• It is more flexible than metal tubing

• It is easier to install than metal tubing

When should damaged aircraft fluid lines be replaced?

• When they are partially damaged

• When replacements are available

• When they are completely damaged

• When they are not completely damaged

What should replacement tubing be made of?

• Any material

• The same size and material as the original tubing

• A different material than the original tubing

• A different size than the original tubing

Why is tubing pressure tested prior to initial installation?

• To ensure that it is made of the correct material

• To ensure that it is the correct size

• To ensure that it can withstand the normal operating pressure

• To ensure that it is flexible enough

What is the most common cause of tubing failure?

• Excessive vibration

• Damage caused by collision with an object

• Improper installation

• All of the above

What materials have replaced copper tubing in modern aircraft?

• Aluminum alloy, corrosion-resistant steel, and titanium

• PVC, rubber, and fiberglass

• Carbon fiber, Kevlar, and fiberglass

• Aluminum alloy and steel

What type of aluminum alloy tubing is used for general purpose lines of low or negligible fluid pressures?

• 1100 H14

• 2024-T3

• 5052-O

• 6061-T6

What type of aluminum alloy tubing is used in hydraulic and pneumatic 1,000 to 1,500 psi systems, and fuel and oil lines?

• 1100 H14

• 2024-T3

• 5052-O

• 6061-T6