Section 4 - Process Control
MCP - Metal Coating Process, LLC
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1. Name the independent process variables.
___a) Metal content
___b) Specific gravity
___c) Amps
___d) All of the above
2. If moisture content increases will the S.G. increase or decrease?
___a) Increase
___b) Decrease
3. If metal content increases will the S.G. increase or decrease?
___a) Increase
___b) Decrease
4. What happens to the finish if too much iron is accumulated in the bath?
___a) Excessive metal removal
___b) Finish becomes dull
___c) Gas streaks
___d) High chrome-iron ratio
5. If you use the # 4000 bath and there is 2% iron content what should the S.G. reading be?
___a) 1.73
___b) 1.75
___c) 1.77
___d) 1.74
6. Name three types of bath control systems.
___a) Precipitation
___b) Decant
___c) Replace entire bath
___d) All of the above
7. What control system is recommended by MCP?
___a) Replace entire bath
___b) Precipitation
___c) Decant
___d) None of the above
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Section 5 - Evaluation
MCP - Metal Coating Process, LLC
1. List the tests for passivation.
___a) Salt spray test
___b) Ferroxyl test
___c) Copper Sulphate test
___d) Koslow test
___e) All of the above
2. What is a profilometer?
___a) A type of hydrometer
___b) Device to measure current
___c) Device measures surface roughness
___d) None of the above
3. An Ra of 12 micro-inches is equivalent to what grit size?
___a) 320
___b) 240
___c) 180
___d) None of the above
4. Define SEM.
___a) Searching electrical magnetism
___b) Scanning electron microscopy
___c) Standard electronic magnetism
___d) None of the above
5. Define ESCA.
___a) Electron spectroscopy for chemical analysis
___b) Electronic standard chemical analysis
___c) Electrical standard chemical atoms
6. Define AES.
___a) Atomic electron standard
___b) Atomic electron spectroscopy
___c) Auger electron spectroscopy
7. What is the typical average thickness of the oxide layer?
___a) 50 angstroms
___b) 15 angstroms
___c) 35 angstroms
___d) 100 angstroms
8. What ratio is used to determine quality?
___a) Nickel: chrome
___b) chrome: iron
___c) Iron: chrome
___d) All of the above
9. What elements are removed from the surface?
___a) Iron
___b) Nickel
___c) Manganese
___d) All of the above
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