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Flashcards in Fluid Lines and Fittings Deck (41)
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1

The size of rigid tubing is determined by

Outside diameter

2

The outside diameter of rigid tubing is in increments of

1/16th of an inch

3

A -4 "B" nut has an outside diameter of:

4/16''

4

A -10 "B" nut has an outside diameter of:

10/16''

5

The two sizing considerations for rigid tubing are:

1. Outside diameter
2. Wall thickness

6

Rigid tubing wall thickness is given in increments of:

thousandths of an inch

7

The method of finding the inside diameter of rigid tubing is to:

Subtracting twice the wall thickness from the outside diameter

8

When cutting a new piece of rigid tubing, you should ALWAYS cut it approximately ______ % (shorter or longer) than the tube being replaced.

10% longer

9

Why should the rigid tubing replacement be cut 10% longer than original?

To allow for margin of error for bending

10

What is the preferred method for rigid tube cutting?

circular tube cutter

11

To start cutting a rigid tube, mark the tube with

a felt tip maker

12

The finishing two steps in cutting a rigid tube with a circular tube cutter

1. Deburr
2. Blow out with compressed air to remove chips

13

When bending lines for a repair, with complex curves and bends, you must produce bends that are ____% of

75% of the original tube diamter

14

What are the 3 types of rigid tube connections?

1. Single/ Double flared connectors
2. Flareless connectors
3. Hose/clamps over a beaded tube

15

The type of fittings/ connectors used for fluid lines depends on 3 things:

1. Pressure range
2. Material being used
3. Routing

16

A flared tube fitting consist of what 2 parts?

1. B-nut
2. Sleeve

17

What is the advantage to using a B-nut and sleeve?

Protects the flare from damage as the nut is tightened

18

Two differences between AC and AN flared tube fittings

1. AN fitting has a shoulder between the threads and cone, AC does not
2. AN is longer for the same size

19

Color of AN flared tube fitting

Blue or Black

20

Color of AC flared tube fitting

Gray or yellow

21

Angle of the AC and AN flared tube fittings

35 degrees and 37 degrees respectively

22

Blue AN flared tube is made of:

Aluminium

23

Black AN flared tube fitting is made of:

Steel

24

The step necessary prior to installing a flareless fitting is called:

Presetting

25

What is presetting?

Applying enough pressure to the sleeve to cause it to cut into the outside of the tube

26

Before beading, what should you do to the part of the tube that is ready to be beaded?

Lubricate with oil

27

Fuel lines should be secured via

bonded line support clamps

28

Scratches or nicks in aluminium tubing are repairable as long as they are

no deeper than 10% of wall thickness and not in the heel of the bend

29

Dents in aluminium tubing are serviceable as long as they are

less than 20% of the tube diameter and not in the heel of the bend

30

Lines that carry fuel are labeled :

FLAM