Jeppesen Oral- Chapter 10 (Fluid Lines & Fittings)

Answer 1

Rigid metal lines flexible hoses

Answer 2

Tubing sized according to wall thickness and outside diameter. OD is measured in 1/16th inch increments.

Answer 3

Stainless steel fittings

Answer 4

Nut fits over the sleeve and draws the sleeve and tubing flare tightly against the male fitting to form seal

Answer 5

The single flare and double flare

Answer 6

AN fittings have shoulder between the flare cone and the end of the thread, AC fittings do not

Answer 7

Sleeve length, thread pitch and shoulder between the threads and flare cone

Answer 8

The nut and the ferrule or sleeve

Answer 9

Flareless fittings don’t have a flare cone and there is no space between the threads and the end of the fitting

Answer 10

The sealing surface may be damaged or the flare may cut off

Answer 11

The lines must be electrically bonded to the structure

Answer 12

It is compatible with nearly every liquid. broad operating temperature range, low resistance to fluid flow and has long shelf and service life

Answer 13

Lay line, identification markings, hose size, date code

Answer 14

The lay line will be straight if the hose is properly installed Twisted lay line if done incorrectly

Answer 15

Inside diameter, measured in 1/16th inch increments

Answer 16

The wall thickness must not be reduced in size or fractured.

Answer 17

Each half has a valve that is held open when coupled and is spring-loaded closed when disconnected

Answer 18

5-8 percent

Answer 19

The tube is weakened when the nut drives the cutting edge of the sleeve too deeply into the tube

Answer 20

To provide a quick means to connect or disconnect a fluid line without loss of fluid or entrance of air into the system

Answer 21

1100-1/2 hard or 3003-1/2 hard aluminum alloy tubing

Answer 22

By its outside diameter.

Answer 23

To show the mechanic whether or not the line has been twisted when it was installed. The line should be straight, not spiraled.

Answer 24

The AN fitting has a shoulder between the end of the flare cone and the first thread. The threads of an AC fitting extend all the way to the flare cone.

Answer 25

Where the engine-driven pump connects to the hydraulic system.

Answer 26

By its inside diameter

Answer 27

The hose should be at least 5% longer than the distance between the fittings. This extra length provides the needed slack

Answer 28

Tighten the fitting by hand until it is snug, then turn it with a wrench for 1/6-turn to 1/3-turn. Never turn it more than 1/3-turn with a wrench.

Answer 29

5052-O and 6061-T aluminum alloy tubing in sizes from 1/8-inch to 3/8- inch OD