Module K (160301)

Question 1

In what way does a hydraulic system operate better with tubing instead of piping?

Answer 1

There is less turbulence with tubing

Question 2

Why is copper not used in hydraulic tubing?

Answer 2

• It accelerates the oxidation of oil
• work hardens and cracks from vibration.

Question 3

On what is the diameter of tubing based?

Answer 3

the outside diameter

Question 4

Which type of tubing is best suited to flared fittings?

Answer 4

thin walled tube

Question 5

Which flare angle is standard for hydraulics in North America?

Answer 5

37* (37 degrees)

Question 6

For which type of tubing are flareless fittings most suited?

Answer 6

thick walled tube

Question 7

What must you do to a tube after you have cut it?

Answer 7

Ream the end to remove the burr

Question 8

What type of wrench should you use on tube fittings?

Answer 8

Use a tube (flare nut) wrench

Question 9

For your safety, what must you do before disassembling a pipe joint?

Answer 9

Always make sure that piping has been drained and blocked

Question 10

How is the wall thickness of tubing specified in the imperial system?

Answer 10

in thousandths of an inch

Question 11

List 2 reasons for using hose instead of rigid conductor

Answer 11

1. to connect moving parts
2. to absorb vibration

Question 12

What is the difference between the rating on a pressure hose and the rating on a vacuum hose?

Answer 12

Pressure hose ratings are based on bursting pressure. Vacuum hose ratings are based on collapse point

Question 13

What is the most important property of the material of the inner tube in a hose?

Answer 13

compatibility with the fluid

Question 14

Which part of a hose determines its pressure rating?

Answer 14

the reinforcing

Question 15

Which type of hose should you use on the inlet to a pump?

Answer 15

A vacuum hose