30 Questions
What is the primary purpose of tools in a workplace?
To make a job easier and enable efficient work
Which type of standard is developed together with industry, government, and society?
National standard
What happens when tools are not properly used and cared for?
Their advantages are lost
What is the primary function of a National Standards Body (NSB)?
To produce national standards
What can happen if you do not use the correct tools and do not know how to use them?
You waste time, reduce your efficiency and may even injure yourself or others
What is the result of preventative maintenance on tools?
Common sense and preventative maintenance prolongs their usefulness
What is the primary purpose of a Tool Control Program?
To identify the specific location of each tool at all times
How do custom foam toolbox inserts help with tool control?
They signal when a tool is removed from the toolbox
What is the purpose of a shadow board in tool control?
To visually manage tool control
What is a key feature of individual toolboxes in a maintenance workshop?
A method to quickly determine that all tools are accounted for
What is a benefit of using custom foam toolbox inserts?
Reduced tool damage due to improper storage
What is the primary goal of a Tool Control Program in the context of maintenance practices?
To ensure all tools are accounted for at the end of a maintenance task
What is the requirement for disposing of mixed two-pack sealants?
They need to be cured completely before disposal.
What is the consequence of misplacing a tool on the job?
Damage to an engine or aircraft
How are dimensions typically placed on an aircraft drawing?
Either parallel to the bottom of the drawing or perpendicular to the dimension lines.
How should hand tools be maintained after use?
Return them promptly to their proper place in the toolbox
What is the nominal dimension of an aircraft part?
The size stated on the drawing.
What does the double prime symbol (″) represent in drawings and dimensional specifications?
Inches.
What is the primary reason for establishing a Tool Control Program in aircraft maintenance organisations?
To prevent foreign object damage (FOD)
What is the tolerance of an aircraft part if its nominal dimension is 5.300 in. and the upper and lower limits are +0.010 and -0.010 in.?
±0.010 in.
What is the estimated annual cost of foreign object damage (FOD) to the global aerospace industry?
$4 billion
What is the acceptable size range for an aircraft part fabricated from sheet metal?
Any size within the maximum and minimum allowable sizes.
Why is it important to keep hand tools clean and free from dirt, grease, and foreign matter?
To maintain tool control and prevent FOD
What is the benefit of organising tools so that those used most frequently can be reached easily?
Increasing productivity
What is the tolerance in a dimension given as a common fraction in aircraft drawings?
±1/64 in.
What is the difference between the nominal dimension of a part and its upper limit or lower limit called?
Allowance
A precision cylindrical part is considered acceptable if its size falls within what range?
The range of the tolerance
What is the tolerance in the example where the nominal dimension is 0.3125 in. and the upper and lower limits are +0.0005 in. and -0.0005 in.?
±0.0005 in.
What is the upper limit of size minus the lower limit of size in the example where the nominal dimension is 5.310 in.?
0.020 in.
What is the difference between the upper limit allowance and the lower limit allowance in the given example?
There is no difference
Study Notes
Types of Standards
- Private standards are used only by the organisation that developed them.
- National standards are produced by a country's National Standards Body (NSB) and are enforced by regulation or are voluntary.
- International standards are produced by the International Organisation for Standardisation (ISO) and are used globally.
Tool Control and Maintenance
- Tools are designed to make a job easier and enable efficient work, but they must be properly used and cared for to maintain their advantages.
- A Tool Control Program should be designed and implemented to track tools from the moment they leave the tool board or toolbox to the moment they are returned.
- Individual toolboxes should have a method to quickly determine that all tools are accounted for at the end of a maintenance task.
- Tool control can vary depending on the needs and parts of the workshop, but the basics remain the same.
Toolboxes and Shadow Boards
- Individual toolboxes can use custom foam toolbox inserts to allow technicians to instantly see if a tool is missing.
- Shadow boards are a popular form of visual management tool control.
Dimensions, Tolerances, and Allowances
- Aircraft drawings are dimensioned using a reference edge from which all dimensions are made.
- Dimensions can be written perpendicular to the dimension lines or parallel to the bottom of the drawing.
- Nominal dimension is the size stated on the drawing.
- Tolerance is the difference between the nominal dimension and the upper and lower limits of size.
- Allowance is the difference between the nominal dimension of a part and its upper limit or lower limit.
Safety and FOD Prevention
- Tool control affects safety, and misplaced tools can cause foreign object damage (FOD) to aircraft engines.
- The National Aerospace FOD Prevention Inc. estimates the cost of FOD to the global aerospace industry at $4 billion annually.
- Most aircraft maintenance organisations establish and enforce a Tool Control Program to prevent FOD caused by misplaced tools.
This quiz covers the different types of standards, including private, national, and international standards. Learn about how they are developed, enforced, and used by organizations and governments. Test your knowledge of standards and their applications!
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