Principles of Hydraulics

Multiple Choice

Which scientific principle is most closely associated with the operation of hydraulic systems?

• Pascal's law

• Newton's first law

• Archimedes' principle

• Bernoulli's equation

Multiple Choice

According to Pascal’s principle, in a hydraulic system a pressure exerted on a piston produces an equal increase in pressure on another piston in the system. If the second piston has an area 10 times that of the first, the force on the second piston is 10 times greater, though the pressure is the same as that on the first piston.

• True
• False

Multiple Select

What is the function of hydraulic fluid in a system? (Check ALL correct answers)

• To lubricate components internally

• To transfer heat generated from friction

• To prevent corrosion of components

• To regulate flow rate

Multiple Choice

What is the purpose of a reservoir in a basic hydraulic system?

• To store hydraulic fluid

• To control flow rate

• To convert power into work

• To measure pressure

Multiple Choice

What is the main method for removing system contamination in a fluid power system?

• Using filters and strainers

• Inspecting service indicator

• Measuring pressure using Psig

• Changing the hydraulic fittings

Multiple Choice

What type of material is commonly used for hydraulic piping?

• Black iron pipe

• Flanged pipe

• Seamless stainless steel tubing

• Hard copper pipe

Multiple Choice

What are the two branches of Fluid Power.

• Pneumatics and Hydrogen

• Pneumatics and Horsepower

• Pneumatics and Hydraulics

• Pneumatics and Horoscops

Multiple Choice

What is pressure?

• Somebody convincing you to jump into a pool.

• How deep a well is.

• Amount of force applied to a given area.

• Amount of water in a cup of water.

Multiple Choice

What is a power unit in hydraulics known as?

• Pump

• Compressor

• Filter

• Internal Combustion Engine

Multiple Choice

The reservoir is used in the power unit to...

• Store oil in a hydraulic system

• Move the fluid in a system

• Condition the fluid

• connect fluid from prime mover to the pump

Multiple Choice

In Pascals Law P (Pressure) is measured using

• PSI

• Pounds

• KG's

• Stones

Multiple Choice

Which one of these is not one of 3 factors that control power in hydraulic system

• pressure

• flow

• direction of flow

• air

Multiple Choice

What is the difference between hydraulics and pneumatics?

• Hydraulic systems use water; pneumatic systems use anything but water.

• Pneumatic systems use liquids and hydraulic systems use gases.

• Hydraulic systems use liquids and pneumatic systems use gases.

• Hydraulic systems always have an MA less than 1 and pneumatic systems always have an MA greater than 1.

Multiple Choice

The basic idea behind any hydraulic system is very simple: Force that is applied at one point is transmitted to another point using________

• A compressible fluid

• An incompressible fluid

• A cold compress

• A hot compress

Multiple Choice

This component controls pressure to an operating hydraulic circuit.

• Actuator

• Regulator

• Manifold

• Viscosity

Multiple Choice

Hydraulic fluid is always?

• Liquid

• Gas

• Solid

• Plasmaq

Multiple Choice

What is the function of a hydraulic pump in a fluid power system?

• To store hydraulic fluid

• To convert mechanical energy into hydraulic energy

• To regulate the flow of hydraulic fluid

• To measure the pressure of hydraulic fluid

Multiple Choice

While the hydraulic fluid is moving through the components, it is coating the surfaces of the components. The coating of fluid does two things name them?

• Lubricates and Seals

• Cools and creates a reservoir.

• Heats and creates a reservoir.

• Hydraulics don't use fluids.

Open Ended

What are hydraulics, the primary hydraulic system components, and the major systems that use hydraulics?

Open Ended

What are some careers related to hydraulic systems?

Open Ended

How can a person inspect, analyze, and repair hydraulic system components?

Open Ended

What are safety hazards present with hydraulics, and what safety precautions should be taken when working with hydraulic systems?

Multiple Choice

Which of the following terms is most closely associated with the principle that pressure applied to a confined fluid is transmitted undiminished throughout the fluid?

• Pascal's law

• Hydrodynamics

• Prime mover

• Rotary actuator

Multiple Choice

Pascal's Law states that a fluid transmits pressure equally in all directions.

• True

• False

Multiple Choice

Which component in a hydraulic system is responsible for raising the piston and load in a double-acting cylinder?

• Gear pump

• Reservoir

• Directional control valve

• Relief valve

Multiple Choice

What are the considerations when choosing a replacement hydraulic hose?

• Determine dash size and proper length

• Ensure compatibility with fluid and proper pressure rating

• Consider color and weight rating

• Ensure proper weight and color coding

Multiple Choice

Which of the following statements about hydraulic systems is correct?

• All hydraulic systems use the same type of oil.

• Each component in a hydraulic system contributes to its overall operation.

• Hydraulic systems do not require pistons.

• Hydraulic systems operate without any reservoirs.

Multiple Select

Which of the following are methods used to keep hydraulic oil clean?

• Strainers

• Filters

• Mixers

• Compressors

Open Ended

Why is it important to keep hydraulic oil clean, and what methods are used to achieve this?

Multiple Choice

Which hydraulic component is responsible for catching particles larger than the screen openings and is located on the supply side of the circuit?

• Strainer

• Filter

• Pump

• Pressure gauge

Multiple Select

Which of the following statements about hydraulic pumps is/are correct?

• They use mechanical power to move hydraulic oil.

• They change fluid power into mechanical power.

• They are always located on the return side of the circuit.

• They change mechanical power into fluid power.

Multiple Choice

$$P\ =F\div A$$  If we are applying 20 pounds of force over 1 square inch how much pressure is being applied?

• 20 psi

• 30 psi

• 21 psi

• 20 pounds 

Open Ended

Why is it important to have a pressure gauge in a hydraulic system, and what could happen if system pressure is not monitored?

Multiple Choice

What happens when the maximum pressure is reached in a hydraulic system equipped with a pressure relief valve?

• The valve opens and diverts the pump’s output back to the reservoir.

• The system shuts down completely.

• The pressure gauge stops working.

• The pump increases its output.

Multiple Choice

Which hydraulic component is responsible for directing the flow of fluid within the system by opening and closing ports?

• Hydraulic actuator

• Directional control valve

• Hydraulic cylinder

• Hydraulic motor

Open Ended

Explain the function of a hydraulic actuator and describe its primary types used in agriculture.

Open Ended

Reflecting on today's lesson about hydraulic systems, what is one scientific principle you found most interesting and why?