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ASM Block 8 (N)
| Question | Answer |
|---|---|
| What grit range is considered Coarse? | 0 - 180 |
| What grit range is considered Medium? | 180 - 320 |
| What grit range is considered Fine? | 320 - 800 |
| What grit is recommended for topcoat removal? | 120 Grit |
| What Grit is recommended for primer removal? | 240 Grit |
| What is an abrasive mat? | Nylon mesh impregnated with aluminum oxide |
| What are the three grades of abrasive mat? | Very Fine, Fine, Medium |
| What grade of abrasive mat is used for primer removal? | Fine |
| What grade of abrasive mat is used for topcoat removal? | Medium |
| What are the two methods of mechanical removal? | Hand-held abrasives, and motor driven abrasives |
| What are some examples of hand-held abrasives? | Bonded abrasive papers or cloths, abrasive mats, metallic wools, and wire brushes |
| What are some examples of motor driven abrasives? | Mat conditioning discs, abrasive discs, flap brushes/wheels, and wire brushes/wheels |
| When using abrasive paper how should you work? | From coarse to fine |
| What T.O. Outlines the masking material? | 1-1-8 |
| What is the advantage of metallic wool? | It can accommodate the shape of whatever you are working on |
| What materials does metallic wool come in? | Aluminum, steel, brass |
| How would you prevent Galvanic corrosion? | By matching metallic wool material with the material you are sanding |
| What is the preferred system to use to collect all dust and sanding remnants? | High efficiency vacuum |
| What could cause a Galvanic cell? | Particles left in crevices or butt joints |
| What are wire brushes used for? | To remove paint that is not tightly adhered to the metal surface |
| When removing topcoat, how much pressure is needed? | The least amount of pressure |
| What is another name for an orbital sander? | DA or dual action sander |
| When using a sander, to prevent damage, what must never be exceeded? | Manufacturer’s recommended operating air pressure |
| When sanding on magnesium surfaces, what must you remember? | The powder and dust created is extremely combustible |
| When using a pneumatic drill, where should you start and stop the tool while using it? | Off of the surface |
| What are advanced composites referred to IAW T.O. 1-1-8? | Non-metallic |
| What are advanced composites defined as IAW T.O. 1-1-8? | Fabric covered surfaces |
| Before attempting to remove coatings from any surface, what must you know? | The material composition of the substrate |
| What is the preferred method for paint removal? | (PMB) Plastic Media Blasting |
| What T.O. Should you refer to if the repair requires the total removal of the topcoat and primer? | Weapon’s Specific and then T.O. 1-1-690 |
| How is Plastic Media Blasting used? | Only removes the topcoat and leaves as much of the original primer on the surface as possible |
| What must you perform wet-sanding with? | Silicon carbide sandpaper |
| What kind of sandpaper can be used on all advanced composite materials? | Aluminum oxide and silicon carbide sandpaper |
| When cleaning up, what kind of vacuum is preferred for use? | HEPA vacuum or compressed air (no greater than 30psi) |
| What Determines what PPE to be used? | Bio-environmental survey |
| What is corrosive, and will burn you if it gets on your skin? | Chemicals for stripping |
| What must be done when the paint has deteriorated and become damaged to the extent that it is no longer protecting the metal from corrosion? | The coating system must be removed? |
| Paint will be removed IAW what T.O.? | T.O. 1-1-8 |
| What T.O. Recommends using wheat starch? | T.O. 1-1-690 |
| What is the media used in Plastic Media Blasting fabricated from? | Plastic stocks free from high-density particle contamination and other impurities |
| What particle size should be used in Plastic Media Blasting? | U.S. screen 20-40 mesh |
| How is the media particles shaped? | Irregular sharp, angular edges and corners |
| How many different types of Plastic Media types are there? | Six |
| What are the three coating removal methods? | Hand-held abrasives Motor driven abrasives Chemical paint stripper |
| What must you never use on advanced composites? | Chemical stripper |
| Who must the dry abrasive blasting be approved by? | SPD (Systems Program Director) |
| What type of blast media do we use? | Type 5 - Plastic |
| What is Type V (5) media particles? | Acrylic Plastic |
| What are the three components of the Blasting Cabinet? | Cabinet / Glove Box, Blast / Reclaimer Assembly, Dust Collector |
| If the Zahn cup is broken or missing, what can be used as an alternative? | #4 Ford Cup |
| What is the Zahn Viscometer Cup? | Device that measures viscosity directly from thier containers |
| How is viscosity expressed? | In seconds |
| What is Viscosity? | A fluid’s internal resistance to flow |
| What are the three components of the Blasting Booth? | Blasting Unit, Blast Reclaimer, Dust Collector |
| How often should you shake the cabinet filters | Every four hours of use |
| What is solvent pop? | Small swelled areas with pinpoint holes in the finish |
| What do resins turn into? | A solid |
| How do u measure a Zahn cup? | A steady stream, or when it first breaks |
| What are the main parts of the paint booth? | |
| What is Velocity? | Air traveling through an empty paint booth |
| What is a nanometer used for? | To measure the capacity reached in the dry filters and baffles in the paint booth |
| What is T.O. 1-1-8? | |
| What is T.O. 1-1-691? | |
| What is the tack test? | 6 hours |
| What is the cure time to remove from a controlled environment | 6 hours |
| What is the cure time before first flight? | 72 hours |
| What is the cure time before application of decals? | 8 hours |
| What is the cure time before engine run up? | 30 hours |
| What is the cure time before wet tape test? | 48 hours |
| Faulty finishing material is part of what? | Shelf life program |
| What are some contributing factors of coating defects? | Oil, water, grease, dust, wax, and silicone |
| What are the seven paint coating defects? | Pinhole cavities, peeling, blistering, fisheyes, pitting or cupping, crazing/mud cracking/checking, and sandpaper finish |
| What are Pinhole Cavities also known as? | Solvent Pop |
| What causes Pinholes? | Dirty Surfaces, Oils, and Solvents trapped under the coating |
| What causes Peeling? | Failure to remove Water, Oil, or Grease from the surface |
| What is peeling? | When the paint does not adhere to the surface |
| What is Blistering? | Small swelled areas like water Blisters on the human skin |
| What causes Blistering? | Oil, Grease, and moisture in the airlines, and incorrect thinner |
| What are fisheyes? | Small crater like depressions in the coating |
| What causes fisheyes | Silicone being left on the surface, greases, and hydraulic fluids |
Created by:
Tphan4462