Module 2 Flashcards Preview

MT 108 Chapter 3 > Module 2 > Flashcards

Flashcards in Module 2 Deck (22):
1

a method used to filter and remove large or heavy contaminants from hydraulic fluid

Settling

2

a rating of the percentage of contaminants of a particular size that a strainer or filter can stop from entering a system

Degree of Filtration

3

a unit for measuring the dimensions of fine particles; one-millionth of a meter

Micron

4

the relationship between the size of a strainer or filter opening and the size of the contaminant particles

Dirt Capacity

5

a medium that collects particles on a single surface; usually used with strainers

Surface Medium

6

a medium that collects particles on a number of surfaces arranged in layers; usually used with filters

Depth Medium

7

If hydraulic fluid is to function properly, it must be _____.

Clean

8

Water is _____ than hydraulic fluid.

Heavier

9

The rating of a filter or strainer that removes almost all of the particles up to a certain size is called its _____ rating.

Nominal

10

Fine contaminant particles usually are measured in _____.

Microns

11

When contaminants begin to pass through a filter, the maximum allowable _____ can be exceeded.

Pressure Drop

12

Name the two types of filter media used in hydraulic systems.

Surface, Depth

13

Abrasion migration generally takes place as a result of _____.

Vibration

14

Most strainers used in hydraulic systems have a surface medium made of _____.

Porous Wire Mesh

15

Inlet strainers should be mounted far enough below the fluid surface of a reservoir to prevent a(n) _____ from forming.

Suction Vortex (Whirlpool)

16

When in-line strainers are used, a coarse strainer is placed in the _____.

Reservoir

17

In-line strainer media usually are made of wound ribbon or _____.

Stacked Disks

18

Filters not only function more effectively than strainers do, they also maintain a low _____.

Pressure Drop

19

Wound-yarn filters are used with fluids that have _____ contaminant concentrations.

High

20

Pleating a paper medium increases its filtering _____.

Surface Area

21

To remove fine metal particles, magnetic plugs usually are mounted in the _____.

Fluid Reservoir

22

As a safety precaution when working on a hydraulic system, always treat the system as if it were _____.

Pressurized