Mobile Test Questions
Basic Hydraulic Principles
Chapter 2
1) List four functions of fluids used in hydraulic systems.
2) What is the compressibiity of hydraulic fluid?
3) What is the formula used to determine the specific gravity of typical hydraulic oil?
4) What is the area in square inches of a 3-inch diameter circle?
5) Define pressure.
6) What is the pressure in Pounds per Square Inch (psi) if the area of the bore end of a cylinder is 7.07 square inches and force is 14,140 pounds?
7) How many cubic inches of fluid are there in 1 gallon and one liter?
8) Define Velocity and how velocity is measured in the U.S. customary system and metric system.
9) How is flow designated and how is it expressed in the U.S. customary system?
10) The magnitude of a pressure drop through and orifice will vary, depending upon what three things?
11) Describe “Potential energy ” and “Kinetic energy”.
12) Why is it important to take into account “Bernoulli’s Principal” when designing a hydraulics system and components?
13) What path does fluid take in a parallel circuit?
14) Describe what happens to flow and pressure in a series circuit.
15) What is gained and what is lost when obtaining mechanical advantage, such as with a fulcrum and lever?
16) Describe “Open Circuit and Closed Circuit” hydraulic systems.
