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45 Cards in this Set
- Front
- Back
What is the angle of the flare for an Aircraft fitting?
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37 degrees
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What is the angle of the flare of an automotive fitting?
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45 degrees
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What materials are aviation solid fluid lines generally made of?
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Aluminum Alloys, Stainless Steel (CRES - "Corrosion Resistant Steel")
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What pressure range is considered to be a "Low Pressure" system?
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BELOW 1,000 PSI
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What pressure range is considered to be a "Medium Pressure" system?
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1,000 to 1,500 PSI
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What pressure range is considered to be a "High Pressure" system?
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ABOVE 1,500 PSI
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What is 2024 Aluminum, and what does the first '2' mean?
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2024 Aluminum is sheet metal commonly used for aircraft skin. It has the strength of steel at half the weight. It is also called "Alclad."
The '2' at the beginning of the number stands for "copper," as this is a copper-aluminum alloy. |
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What is 5052-O Aluminum, and what does the "O" mean? What does the '5' at the start of the number signify?
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5052-O is a very common Aluminum alloy used for solid fluid lines in Medium Pressure systems in aircraft.
The "O" means the material is in its "annealed" state, which means it can be bent and shaped without cracking. The first '5' signifies "Magnesium," as this is a magnesium-aluminum alloy. |
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What increments are used for ridgid tubing sizes? Given your answer, what size would -4 tubing be?
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1/16 in increment
-4 tubing would be 4/16 or 1/4". |
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What type of material is used for ridgid fluid lines in High Pressure systems?
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Stainless Steel
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How much of the wall thickness of a ridgid fluid line can be damaged before it must be replaced?
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10% of the wall thickness
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What are aviation ridgid fluid fittings called, and what does it mean if they are blue? If they are Black?
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They are called "AN Fittings."
Blue means it is made of Aluminum Black means it is made of Steel |
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What is the maximum allowable Offset of two beaded fluid lines being clamped together? What is the maximum allowable Angular Deviation between them?
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Max Offset: 1/16 in.
Max Angular Deviation: 3 degrees |
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Given a Tube Outer Diameter of 1/8" - 3/16", what is the maxumum distance between support clamps?
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9 inches
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Given a Tube Outer Diameter of 1/4" - 5/16", what is the maxumum distance between support clamps?
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12 inches
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Given a Tube Outer Diameter of 3/8" - 1/2", what is the maxumum distance between support clamps?
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16 inches
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Given a Tube Outer Diameter of 5/8" - 3/4", what is the maxumum distance between support clamps?
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22 inches
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Given a Tube Outer Diameter of 1" - 1-1/4", what is the maxumum distance between support clamps?
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30 inches
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Given a Tube Outer Diameter of 1-1/2 - 2", what is the maxumum distance between support clamps?
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40 inches
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What type of Aluminum is used in Low Pressure fluid system ridgid lines?
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1100-H14 (half-hard)
or 3003-H14 (half-hard) |
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What designation series is given to "commercially pure" Aluminum?
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1100 series
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What type of Aluminum is used for Medium Pressure ridgid fluid lines?
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5052-O Aluminum (magnesium alloy)
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2024-T Aluminum is occasionally used in aircraft fluid lines. Why is this? Why is it not used more often?
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It is used occasionally because of its higher strength.
It is not used more often because it is not as flexible and therefore harder to bend and flare without cracking. |
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Describe Mil Spec 5606 Hydraulic fluid (color, base)
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Red colored, Petroleum based
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Describe SKYDROL (color, base)
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Light Purple in color, Synthetic
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What are the four materials most commonly used for flexible tubing Inner Liners?
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1) Neoprene
2) Buna-N 3) Butyl 4) Teflon |
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Which Inner Tube Liner materials are safe for use with petroleum-based hydraulic fluids?
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1) Neoprene
2) Buna-N 3) Teflon |
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Which Inner Tube Material is safe for use with Synthetic SKYDROL?
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1) Butyl
2) Teflon |
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What happens if you use 5056 Hydraulic Fluid in Butyl hose lines?
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They will break down and leak because they are made using petroleum.
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What fluid lines are red?
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Fuel
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Which fluid lines are red and grey?
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Water Injection
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What type of lines are brown and orange?
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Electrical Conduit
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What type of lines are orange?
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Compressed Gas
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Which lines are orange and grey?
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Instrument Air
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Which lines are orange and blue?
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Pneumatic
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Which lines are blue?
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Coolant
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What does a line warning symbol look like?
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Which lines are blue and yellow?
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Hydraulic
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Which fluid lines are yellow?
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Lubrication
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Which lines are green?
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Breathing Oxygen
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Which lines are grey?
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De-icing
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Which lines are brown?
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Fire Protection
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Which lines are brown and grey?
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Air Condition
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Which lines are white and say "drain" on them?
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Drains
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How much of the total diameter of a ridgid fluid line can be Dented before the piece should be discarded?
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20%
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