Quiz on Physical Properties of Hydraulic Fluids

What is the primary function of hydraulic fluids?

• Store energy

• Cool machinery

• Transmit power

• Filter contaminants

Which property is NOT desired in hydraulic fluids?

• Low compressibility

• High volatility

• Good lubricity

• Chemical stability

What does specific weight refer to?

• Weight of a liquid

• Weight of a solid

• Weight of a gas

• Weight per unit volume

What is the specific gravity of water defined as?

• 2

• 1

• 0.5

• 0.8

Which of the following is a characteristic of gases?

• Incompressible

• Definite volume

• Readily compressible

• Fixed shape

What happens if the viscosity of hydraulic fluid is too high?

• Sluggish operation

• Lower temperature

• Decreased power consumption

• Increased oil leakage

What is the primary concern with corrosion in hydraulic systems?

• Formation of bubbles

• Deterioration of metal surfaces

• Increased fluid density

• Increased viscosity

What does kinematic viscosity measure?

• Specific weight

• Density of the fluid

• Resistance to flow

• Pressure in the system

What is the formula for pressure in a hydraulic system?

• P = F/A

• P = V/T

• P = W/V

• P = m*g

What is the role of anti-wear additives in hydraulic fluids?

• Enhance corrosion

• Form a protective film

• Increase fluid density

• Reduce viscosity