Fluid Mechanic's Flashcards
What are the 2 areas of fluid power?
1) Hydraulics
2) Pneumatics
Fluid must do 3 thing:
1) Take shape of container
2) Exert a pressure
3) Flow
What is a fluid?
A fluid will flow into the shape of its container and exert a pressure
What is the difference between a liquid and a gas?
1) Liquid has a constant volume
2) Pressure determines a gases volume and density
What is specific gravity?
Specific gravity is the relative density to fresh water
What is pressure?
Force per unit area
What dictates pressure?
The greatest resistance to flow
Pressure can be created 3 ways:
1) Weight of a column of fluid
2) Force applied on a confined fluid
3) Resistance to flow
What equation represents pressure?
Force=Pressure x Area
What is Pascal’s Law?
Pressure on a confined fluid is equal in all directions
What 3 things affect the capacity of a pump?
1) Viscosity
2) Size of pump
3) RPM
What is any pressure less than the atmospheric pressure around you?
Vacuum
What is the formation and collapse of air bubbles?
Cavitation
Boyles law states that as volume _______, pressure _______.
decreases, increases
What creates a restriction to control flow or create a pressure drop
Orifice
What are the 2 types of orifices?
1) Adjustable
2) Fixed
A gases density is based on the ________ it’s exposed to.
Pressure
Height of a column of fluid is referred to as?
Head
Systems that utilize fluid, but not for power transmission are considered what?
Fluid distribution systems
Without _______, no power can be transmitted
Pressure
An atmosphere is a pressure unit equal to ______ psi?
14.7
What does a barometer read at 14.7psi?
29.92”
An _______ is a pressure unit equal to 14.7psi.
Atmosphere
The amount of flow through an orifice is determined by what 4 things?
1) Size
2) Viscosity
3) Pressure
4) Flow
