Corrosion tests used with petroleum$-$based

hydraulic fluids determine the effect on metal

parts of components from

compounds that

have remained in the fluid after refining.

Which of the following is a general method used

to establish the lubrication and wear$-$prevention

qualities of hydraulic fluids?

A$.$ Capillary viscometer.

B$.$ Extreme$-$pressure test.

C$.$ Saybolt universal viscosity system.

D$.$ All of the above.

When storing and handling replacement

hydraulic fluid drums, place drums on their sides

to reduce chances of

When cylinders are exposed to extreme

conditions, contamination of system fluid can be

reduced by using

to prevent the entry of dirt

from the surfaces of the piston rods.

Fluid samples taken from hydraulic systems for

routine testing purposes should be collected only

from the

of the fluid in the reservoir and

only when the system is at operating temperature.

in the fluid of a hydraulic system is caused

by forcing fluid through the system without

completing work outside of the system.

than$-$recommended temperatures cause

fluid oxidation and general fluid deterioration.

The cleanliness of the fluid in most hydraulic

systems is ensured by the addition of

A$.$ temperature control devices

B$.$ adequate storage drums

C$.$ filtration devices

D$.$ transfer pumps