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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Of what material are most low pressure fluid lines made? |
Hard aluminum alloy tubing of type 1100-1/2, 3003-1/2 |
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How is the size of a rigid fluid line determined by it's inside or outside diameter? |
Outside diameter |
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When routing a fluid line parallel to an electrical wire bundle which should be on top? |
The electrical wire bundle |
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What is the function of the lay line or the identification stripe on a line that runs the length of a flexible hose? |
It should indicate whether or not the line was twisted when it was installed the line should be straight and not spiraled. |
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How can you distinguish an AN fluid line fitting from an AC fitting? |
AN fitting has a shoulder between the end of the flare cone and the first tread, meanwhile the threads of an AC fitting extend all the way to the flare cone. |
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Where are quick disconnect fluid line couplings normally used in an aircraft hydraulic system |
Where the engine driven pump connects into the hydraulic system. |
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Is the size of a flexible hose determined by its inside or it's outside diameter? |
inside diameter |
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What is the minimum amount of slack that must be left when a flexible hose is installed in an aircraft hydraulic system. |
5% longer than the distance between the fittings |
The extra land provides the needed slack |
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How tight should an MS flareless fitting be tightened? |
By hand until it snugs, and 1/6 turn to 1/3 turn with a wrench. |
Never turn more than 1/3 turn with a wrench. |
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What damage can be caused by over tightening an MS flareless fitting? |
It will drive the cutting edge of the sleeve deeply into the tube, and it can weaken it. |
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What kind of rigid tubing can be flared with a double flare? |
5052-O and 6061-T aluminum alloy tubing of 1/8 inch to 3/8 inch outside diameter. |
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What is the principal advantage of a Teflon hose for using an aircraft hydraulic system? |
It retains its high strength under conditions of high temperature. |
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What precautions should be taken when flaring a piece of aluminum alloy tubing? |
The end of the tubing must be polished so it will not crack when it's stretched with the flaring tool. |
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How much pressure is used to prooof test a flexible hose assembly? |
Generally about two times the recommended operating pressure for the hose. |
However this varies with the hose type. |
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Of what material should rigid fluid lines be made that carry high pressure (3000 psi or greater) hydraulic fluid? |
Annealed or 1/4-hard corrosion resistance steel |
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What is the difference between the flare angle for aircraft and automotive fittings? |
Aircraft fittings have a 37° flare angle while automotive fittings use a 45° flare angle. |
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