G - Hydraulic Fundamentals Flashcards
The definition of a fluid is:
A substance that flows.
The major difference between liquids and gases is that:
Liquids resist compression.
State Pascal’s Law:
Force exerted on a confined liquid is transmitted equally and undiminished in all directions, acting with equal force on equal areas and at right angles to them.
Pressure in a hydraulic system is created by:
Resistance to liquid flow.
Pressure losses in a hydraulic system are created by:
By resistance to flow that is created by system components.
Pressure is defined as:
Force per unit area.
As the force applied to a confined liquid increases, pressure:
Increases.
As the area that a force is acting on increases, pressure:
Decreases.
What are the correct metric hydraulic units for pressure, force, mass, and area?
Pressure - kilopascals (kPa)
Force - newtons (N)
Mass - kilograms (kg)
Area - square metres (m2)
The pressure resulting from 125 kg acting on a circular area with a 25 cm diameter is:
25 kPa
As the pressure acting on an area increases, the resulting force:
Increases.
An increase in the area that a given pressure acts upon causes the resulting force to:
Increase.
The pressure resulting from 450 kg acting on a circular area with a 20 cm diameter is:
140.37 kPa
Pressure created by the weight of a fluid is called:
Pressure head.
A pressure measurement that includes atmospheric pressure is:
An absolute pressure measurement.
