TPC 307 Basic Hydraulics Flashcards
What characterstic of a fluid does the term “specific gravity” describe?
Density
Pressure is measured in ______ in the English system.
Pounds per square inch
Which of the following is NOT needed in order to calculate the work a hydraulic cylinder can do?
Power (ft-lb/min)
Pascals Law states that pressure exerted on a confined liquid:
Is distributed equally throughout the liquid
According to Bernoulli’s Principle, when fluid flow increases in a system the pressure…
Decreases
A hydraulic fluid must be able to do all of the following EXCEPT
Compress easily
A hydraulic fluid that exhibits little change in viscosity when heated is said to have a high….
Viscosity index
The ability of a fluid to penetrate into small clearances between closely fitted parts is determined by the fluid’s….
Viscosity
Which of the following, when added to hydraulic fluid will limit oxidation?
A chemical inhibitor
The best method of controlling hydraulic fluid contamination is the use of
Good maintenance procedure
The ability of a filter or strainer to remove 100% of the contaminant particles of a particular size from a hydraulic fluid is called it’s:
Absolute rating
When the maximum allowable pressure drop of a filter is reached, the filter will…
Allow particles to pass through the medium
The purpose of a filter in a hydraulic system is to…
remove small contaminates
Depth filters do NOT
have a long service life
Surface filter media made of sintered metal powders are used in high pressure systems because of their:
Thick mass
The separation of contaminants from hydraulic fluid in a reservoir is aided by:
Slow fluid movement
What is used in a hydraulic reservoir to aid fluid cooling?
A baffle
To mantain the temperature of a hydraulic fluid effectively, the reservoir should have
Thin walls
An air breather is installed on a fluid reservoir to:
Vent the reservoir
Peak hydraulic system demands are usually met by the use of a(n)
Accumulator