Podcast
Questions and Answers
What is a crucial aspect of a paint shop facility?
What is a crucial aspect of a paint shop facility?
Most aircraft maintenance shops have compressors capable of producing air pressure of about 200 psi.
Most aircraft maintenance shops have compressors capable of producing air pressure of about 200 psi.
False
What is the purpose of a water trap in a filter and regulator unit?
What is the purpose of a water trap in a filter and regulator unit?
To remove water from the air supply
In a paint shop, the fan should be placed near the____________.
In a paint shop, the fan should be placed near the____________.
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What is a type of paint spray system?
What is a type of paint spray system?
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HVLP systems generally exceed 10 psi of atomizing air.
HVLP systems generally exceed 10 psi of atomizing air.
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Why should maintenance technicians wear proper masks and breathing equipment while spraying paint?
Why should maintenance technicians wear proper masks and breathing equipment while spraying paint?
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Match the following paint shop equipment with their description:
Match the following paint shop equipment with their description:
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Which type of thinner is used to prevent blushing in high humidity?
Which type of thinner is used to prevent blushing in high humidity?
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Acetone is effective in removing polyurethane finishes.
Acetone is effective in removing polyurethane finishes.
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What is the primary concern in the shop when working with paint?
What is the primary concern in the shop when working with paint?
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Airshow-quality fabric finishes consist of many coats of dope, sanded with _______ grit paper between each coat.
Airshow-quality fabric finishes consist of many coats of dope, sanded with _______ grit paper between each coat.
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What type of thinner is universally used as a solvent and a cleaner?
What type of thinner is universally used as a solvent and a cleaner?
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Butyrate thinner can be used to thin acrylics.
Butyrate thinner can be used to thin acrylics.
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What is used to fill cracks or low spots in wood skins before covering them with fabric?
What is used to fill cracks or low spots in wood skins before covering them with fabric?
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Match the following materials with their uses:
Match the following materials with their uses:
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Study Notes
Dope Thinners
- TT-T-266C test determines whether dope is nitrate or butyrate
- Nitrate dope softens immediately when tested, whereas butyrate does not
- Dope thinners can be used in both butyrate and nitrate dope, but nitrate thinners cannot be used in butyrate
- Acrylic lacquer thinner can be used in both butyrate and nitrate dope, but is not recommended
- Butyrate thinner cannot be used to thin acrylics
Retarder
- Retarder is a special type of thinner with rich solvents that dry slowly
- Prevents temperature drop that condenses moisture and causes blushing
- Used in place of regular thinner in high humidity conditions
Anti-Blush Thinner and Acetone
- Anti-blush thinner used in airshow-quality fabric finishes
- Acetone is a universal solvent and cleaner
- Used to remove lacquer finishes and for clean-up after painting
- Softens acrylics or lacquers that have set-up in spray guns or hoses, but has little effect on polyurethane
- Only use virgin acetone, as recovered acetone can be acidic and damaging
Spot Putty and Sanding Surfaces
- Nitrocellulose spot putty used to fill cracks or low spots in wood skins before covering with fabric
- Ensure defects that may cause loss of structural strength are not covered up and hidden
Finishing Equipment and Safety
- Safety is a primary concern in the shop
- Proper storage of paint and chemical strippers, electrical outlets, personal protection, and fire safety are major concerns
- Knowledge of equipment and tools available increases safety and ease of workload
- Maintenance technician should be familiar with paint shop facility, tools, and equipment required to finish the job safely and professionally
Paint Room
- Ideally, paint rooms should be equipped with vapor-proof lights and controlled temperature and humidity for optimum spraying conditions
- Fumes are heavier than air, so place fans near the floor
- Fans should be belt-driven with motors located in areas free of potentially explosive fumes
- Wear proper masks and breathing equipment while spraying paint
- Protect skin from direct contact with chemicals and paints
Air Supply
- Adequate air supply is crucial in a paint shop with conventional high-pressure spray guns
- Air must be free of oil and water, and have sufficient pressure (typically 150 psi)
- Air is stored in a receiver and piped to the paint shop, then filtered and regulated before use
Painting and Spray Equipment
- Newer methods include:
- High Volume/Low Pressure (HVLP) spray systems
- Electrostatic paint spray systems
- Powder coating systems
- HVLP systems produce over 20 cubic feet per minute of atomizing air at less than 10 psi
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Description
This quiz identifies the characteristics of nitrate and butyrate dope thinners, and their compatibility with various types of dope. It also covers the use of retarder and acrylic lacquer thinner.
