Unit 1 Flashcards
What is the system pressure when a weight (force) of 5000lbs is placed on a hydraulic plunger having an area of 25 square inches?
200PSI
What type of hydraulic system is used for hydraulic elevators?
Open-loop
Whose principle states that “for the horizontal flow of fluid through a tube, the sum of the pressure and the kinetic energetic per unit volume of the fluid is constant?
Bernoulli’s
How is viscosity defined when referring to hydraulic fluid?
Resistance of a fluid to flow
What term is used to describe fluid flow in the parallel layers, with no disruption between the layers?
Streamline flow
What term is defined as the volume of liquid passing a point in a given time?
Volume of flow, or flow rate
How is pressure expressed when calculating hydraulic system pressure?
PSI
What happens to the viscosity of a hydraulic liquid with an increase in temperature?
Viscosity decreases
What diameter of pipe would have the greatest velocity of flow given the same volume of input to each?
The smaller one - (4inches)
What are the three states in which matter exists?
Solids, liquids, and gasses
What is calculated by dividing force by area?
Pressure
What law states that pressure in a fluid acts equally in all directions?
Pascals law
How is the density of a substance quantified?
Mass x volume
What is a dominant factor in determining the state of a substance?
Temperature
How can the total force/weight of the elevator be calculated if a pressure gauge is used to measure the elevator at rest and the area of the plunger is known ?
Pressure x area = force
