Hydraulics as we use it provides a very practical:

A$.$ Power multiplier.

B$.$ Force multiplier.

C$.$ Energy multiplier.

D$.$ Work multiplier.

Cavitation can be the result of:

A$.$ A loose pump inlet line fitting.

B$.$ Excessive pump rpm$.$

C$.$ A crimped pressure line.

D$.$ A clogged retum line filter.

The pressure at the bottom of a $20-$foot colamn of oil is approximately:

A$.1\mathrm{.}2$ PSIA

B$.4,8$ PSI

C$.8$ PSI

D$.18$ PSI

Aeration can be the result of

A$.$ A crimped pressure line.

B$.$ A clogged return line filier.

C$.$ A loose inlet fitting,

D$.$ A blocked pump inlet line.

The inlet of a pump is filled with oil:

A$.$ By the weight of the Earth's atmosphere

B$.$ At the factory so it can run indefinitely

C$.$ By a $-25$ Psi vacuum inside the pump

D$.$ By a mechanic pouring it in as it runs

Pressure in a hydraulic system:

A$.$ Is affected by small leaks.

B$.$ Is caused by resistance to fluid flow.

C$.$ Is dependent upon pump classification.

D$.$ Is modulated by the system relief valve.