Aircraft Hydraulic System Maintenance Quiz and Flashcards

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Questions and Answers

Where is the return line filter typically located in a hydraulic system?

At the output side of the hydraulic pump
At the end of the supply line
At the midpoint of the return line (correct)
At the input side of the hydraulic pump

What is the primary goal of a preventive maintenance program for a hydraulic system?

To reduce the complexity of the system
To eliminate most hydraulic component failures (correct)
To increase the system's operating frequency
To ensure minimum flow and pressure during operation

What is the primary function of the hydraulic fluid in an aircraft hydraulic system?

To cool the system components
To transmit energy in the system (correct)
To lubricate the system components
To generate pressure in the system

What is a common pitfall in many organizations' preventive maintenance procedures?

Not requiring maintenance personnel to follow the procedures (D) Signup and view all the answers

What is the minimum auto-ignition temperature of most aviation hydraulic fluids?

475 degrees C (A) Signup and view all the answers

What is the first step in developing a preventive maintenance program for a hydraulic system?

Identify the system operating condition (D) Signup and view all the answers

What is a critical property of hydraulic fluids used in aircraft hydraulic systems?

High flash point (B) Signup and view all the answers

What is the primary characteristic of a preventive maintenance program?

It is performance-oriented (D) Signup and view all the answers

Why are phosphate esters used as hydraulic fluids in aircraft systems?

Because they are very difficult to ignite at room temperature (C) Signup and view all the answers

What is the primary benefit of a well-implemented preventive maintenance program for a hydraulic system?

Elimination of most hydraulic component failures (B) Signup and view all the answers

What is a challenge in designing aircraft hydraulic systems?

Operating efficiently over a broad temperature spectrum (B) Signup and view all the answers

What is the primary role of hydraulic systems in various applications?

To transfer high forces rapidly and accurately over a long distance (B) Signup and view all the answers

What is the basic principle of hydraulics as stated by Pascal's Law?

Pressure applied to any part of a confined fluid transmits to every other part with no loss (A) Signup and view all the answers

What is the recommended approach to developing a preventive maintenance program for a hydraulic system?

Develop a program based on the system's operating condition (D) Signup and view all the answers

What is the formula to calculate hydraulic pressure?

Pressure = Force / Area (B) Signup and view all the answers

What is the characteristic of hydraulic pressure in a confined fluid?

It acts with equal force on all equal areas of the confining walls and perpendicular to the walls (B) Signup and view all the answers

What is the purpose of including environmental concerns in a Preventive Maintenance procedure?

To identify potential hazards to the environment (C) Signup and view all the answers

What is the application of more powerful and accurate hydraulic systems?

In maneuvering huge ships (C) Signup and view all the answers

What is the primary focus of the 5th step in creating a Preventive Maintenance program for a hydraulic system?

Analyzing the equipment's history to verify maintenance procedures (A) Signup and view all the answers

What is the purpose of including a list of safety precautions in a Preventive Maintenance procedure?

To minimize the risk of accidents and injuries during maintenance (A) Signup and view all the answers

What is the primary benefit of having a comprehensive Preventive Maintenance program for a hydraulic system?

Ensuring the reliability and longevity of the hydraulic system (A) Signup and view all the answers

What is the purpose of specifying the store room number for parts and materials in a Preventive Maintenance procedure?

To facilitate the identification and retrieval of necessary parts and materials (B) Signup and view all the answers

What is the primary goal of a Preventive Maintenance program for a hydraulic system?

To prevent unexpected failures and reduce downtime (C) Signup and view all the answers

What is the advantage of hydraulic systems in terms of pipe size and weight?

They can transfer high forces rapidly and accurately even in small pipes of light weight (B) Signup and view all the answers

What is the common approach to hydraulic system maintenance in most companies?

Allowing the hydraulic system to control maintenance at a higher cost (B) Signup and view all the answers

What is the recommended percentage of hydraulic troubleshooters in a maintenance workforce?

10% or less (B) Signup and view all the answers

What is the primary role of general hydraulic maintenance personnel?

Conducting preventive maintenance procedures (B) Signup and view all the answers

What is the primary goal of a preventative maintenance approach to hydraulic systems?

Developing a proactive maintenance strategy (B) Signup and view all the answers

What is the importance of having 'hydraulic knowledge' in maintenance?

It is power in hydraulic maintenance (A) Signup and view all the answers

What is the expected outcome of implementing a preventative maintenance approach to hydraulic systems?

Reduced maintenance costs and increased system performance (A) Signup and view all the answers

Flashcards

Return Line Filter

Located at the hydraulic pump's input side; removes contamination from hydraulic fluid at the return line's end.

High Flash Point

A temperature at which a liquid produces sufficient vapor to form an ignitable mixture with air.