Flexible lines must be installed with
AIR 1120 Flexible Lines

Quiz
•
Other
•
University
•
Hard
Pilgrim Maslow
Used 4+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
a slack of 5 to 8 percent of the length.
a slack of at least 10 to 12 percent of the length.
enough slack to allow maximum flexing during operation
at least one 90° bend
Answer explanation
When flexible lines are installed in a fluid power system, they should be between 5 percent and 8 percent longer than the space between the fittings. This extra length (this slack) makes allowance for expansion in the system due to heat and for the fact that a hose contracts in its length when it is pressurized
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Flexible hose used in aircraft systems is classified in size according to the
outside diameter.
wall thickness
inside diameter
reinforcement thickness
Answer explanation
The size of flexible hose is determined by its inside diameter. Sizes are in 1/16-inch increments and relate to corresponding sizes of rigid tubing with which it can be used
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 3/8 inch aircraft high pressure flexible hose as compared to 3/8 inch metal tubing used in the same system will
have higher flow capabilities.
have equivalent flow characteristics
usually have interchangeable applications
be used more often than rigid metal tubing
Answer explanation
Flexible hose may be used in any part of an aircraft fluid system where it has been proven by the aircraft manufacturer to be suitable. The hose must be able to carry the pressure, withstand the vibration, and pass the required fluid flow. The size of a flexible hose is approximately its inside diameter in 1/16-inch increments. This refers to the outside diameter of a rigid tube that has the equivalent flow characteristics
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these flexible line materials are used with petroleum base hydraulic fluids?
Natural rubber, Ethylene-propylene
Neoprene, Buna-N
Natural rubber, Butyl rubber
Butyl, Neoprene
Answer explanation
petroleum-base hydraulic fluid are made of synthetic rubber. Neoprene and Buna-N are forms of synthetic rubber
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Teflon hose that has developed a permanent set from being exposed to high pressure or temperature should
not be straightened or bent further
not be reinstalled once removed
be immediately replaced
be replaced within 100 hours or 6 months
Answer explanation
When a Teflon hose that has developed a permanent set from exposure to high pressure or temperature is removed from an aircraft hydraulic system, its ends should be supported to prevent the hose from being straightened or further bent
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What markings are on a fluid line that is carrying hydraulic fluid?
Blue and Yellow stripes with circles on a white background
Orange and Blue stripes with connected diamonds on a white background
Blue stripe with squares on a white background
Red stripe with stars on a white background
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Flexible fluid lines can handle negative and positive pressure
True
False
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