Aircraft Plumbing and Fitting Concepts

The video tutorial covers fluid lines and fittings in aircraft, focusing on metal tubing and flexible hoses. It explains the classification, identification, and installation of these components, including the types of fittings and flares used. The tutorial also discusses the materials suitable for different applications, inspection and maintenance practices, and guidelines for bending and repairing tubing. Additionally, it highlights the importance of proper installation to prevent issues like over-tightening and twisting.

What are the two general types of fluid lines used in aircraft plumbing?

• Steel tubing and plastic hose

• Plastic tubing and flexible hose

• Metal tubing and flexible hose

• Copper tubing and rubber hose

How is metal tubing classified in terms of size?

• By inside diameter in 1/8 inch increments

• By outside diameter in 1/16 inch increments

• By wall thickness in 1/4 inch increments

• By length in 1/2 inch increments

What must be taken care of when deburring the end of tubing?

• Ensure the tube is not too short

• Ensure the tube is not too long

• Ensure the wall thickness is not fractured or reduced

• Ensure the tube is not bent

What are the parts of a military standard flareless tube fitting?

• A body, a cone, and a bolt

• A body, a sleeve, and a nut

• A cone, a sleeve, and a bolt

• A flange, a sleeve, and a nut

What is the principal advantage of flexible Teflon hose?

• High operating strength at elevated temperatures

• Low cost

• Ease of installation

• Lightweight

How can you tell if a flexible hose has been installed in a twisted position?

• By the diameter of the hose

• By the color of the hose

• By the identification stripe running along the hose

• By the length of the hose

What happens to a flareless tube fitting when it is over-tightened?

• The tube becomes longer

• The nut drives the cutting edge of the sleeve deeply into the tube

• The nut becomes loose

• The tube becomes shorter

What type of fittings material should be used with stainless steel tubing?

• Stainless steel fittings

• Copper fittings

• Aluminum fittings

• Plastic fittings

What is the purpose of a sleeve on a flared tube connection?

• To protect the tube from corrosion

• To draw the sleeve and tubing flared tightly against the male fitting

• To increase the length of the tube

• To reduce the weight of the tube

How is flared tubing affected by over-tightening of the fittings?

• The tube becomes more rigid

• The tube becomes longer

• The tube flare is likely to be damaged

• The tube becomes more flexible