Hydraulic Fluids Quiz

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What type of fire point is desirable for hydraulic fluids?

Medium

Low

High (correct)

Variable

Which type of fluid is mainly used in small aircraft hydraulic systems?

MIL-H-5606 (correct)

MIL-H-83299

MIL-H-83287

MIL-H-83283

What type of filter element is typically cleaned and replaced in hydraulic systems?

Paper-type filters

Activited carbon filters

Metal mesh filters (correct)

Nylon filters

What is the primary source of energy in an aircraft hydraulic system?

Electric motor pumps Signup and view all the answers

What does a nonpositive displacement pump do when it rotates?

Moves a specific volume of fluid each time Signup and view all the answers

What does an actuator do in the context of hydraulic systems?

Transforms flow energy into mechanical work Signup and view all the answers

What is the function of an actuator in a hydraulic system?

To produce the power required for movement Signup and view all the answers

Why do most reservoirs in aircraft hydraulic systems have baffles and/or fins?

To maintain fluid movement and prevent foaming Signup and view all the answers

What is the typical range of operating pressures for aircraft hydraulic systems?

2,000 psi to 5,000 psi Signup and view all the answers

Which of the following is NOT a main category of hydraulic fluids?

Silicone-based fluid Signup and view all the answers

What is the primary function of filters in a hydraulic system?

To provide control over contamination Signup and view all the answers

Where is bleed air used to pressurize the hydraulic tank taken from?

Engine compressor or APU Signup and view all the answers

What is the function of seals in a hydraulic system?

To prevent fluid leakage and keep air/dirt out of the system Signup and view all the answers

Which of the following statements regarding hydraulic fluids is TRUE?

Chemical stability helps resist oxidation and deterioration in hydraulic fluids Signup and view all the answers

What does the fire point of a liquid represent?

The temperature at which the liquid ignites momentarily when exposed to a flame Signup and view all the answers

Why is chemical stability an important property when selecting a hydraulic fluid?

To resist oxidation and deterioration over time Signup and view all the answers

What is the flash point of a substance?

The temperature at which the substance gives off vapor and ignites momentarily Signup and view all the answers

Hydraulic Fluids Quiz

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