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53 Cards in this Set
- Front
- Back
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What is the highly protective surface on stainless steel |
Chromium oxide prevents surface imperfections |
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What is 316 stainless also known as |
Marine-grade |
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What are the characteristics of 302 and 304 stainless |
Good rollforming and break qualities, 304 can be easily deep drawn without heat softening, outstanding weld characteristics no post weld annealing needed |
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What are the characteristics of 316 |
Better corrosion resistance than 302 or 304 stands up well to concentrations of acid such as laboratory and Marine applications |
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What is a number 1 finish |
Hot rolled annealed and pickled, Frosty White surface, used for industrial purposes where appearance isn't important |
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What is the number 2B finish |
Bright cold rolled annealed pickled & Final Light cold- Rolling Pass, smoother than 2D, this is the standard light gauge all-purpose finish |
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What is the number 4 finish |
Standard all-purpose polished finish, produced by grinding with 150 grit abrasive cloth, commonly used for countertops rails and shelving |
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What is a number 6 finish |
Dull satin architectural finish of lower reflectivity than number 4 finish, produced by brushing number 4 finish, special mill order only |
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What is the number 8 finish |
mirror finish, produced by buffing number 7 finish with Rouge until grit lines are removed, special mail order only |
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What is the number 10 finish |
Bright annealed highly reflective finish produced on mirror polished rolls and softened in a controlled atmosphere furnace |
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What will happen if mild steel particles get embedded under stainless steel oxide film |
Surface will no longer resist corrosion and will show signs of rust |
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What is important to maintain when cutting stainless |
Keep the blades sharp and maintain close tolerances |
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What is the capacity of the shear when cutting stainless steel |
50 to 70% then mild Steel |
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What are the best type of blades used for cutting stainless |
High speed steel blades |
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What is the common practice rake angle of the upper blade when cutting stainless steel |
1 1/2 degrees |
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What happens to material when a greater rake angle is used |
It becomes more distorted or twisted |
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How are high-powered Snips labelled |
Special for Alloy and stainless steel |
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Why must material be deburred after cutting |
To prevent them from scratching adjacent sheets and your hands |
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What type of Blade should be used on hacksaws or band saws |
High speed blades with at least 32 teeth per inch |
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Aside from small section Cuts what will happen when dry cutting |
The ends will show some heat tinting or burning |
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What must be done when punching stainless steel |
Used twice the power but reduce the speed by 50%, use a closed punch and die clearance as possible, keep tools sharp and closely adjusted, and the minimum hole diameter at least twice the material thickness |
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What must be done when drilling stainless |
Use high-speed drill bits as short as possible for rigidity, reduce the drill speed to 50% of mild Steel, use constant pressure to avoid work hardening keep drill bits sharp and well lubricated |
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What cutting angle on the tip of the drill bit must be used |
130 to 140 degrees |
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What type of a centre punch can be used on stainless |
Standard centre punch can be used but must be hit lightly to prevent work hardening |
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How do you calculate the tonnage required when bending on a brake press |
Refer to the bending chart and the manufacturer's recommended multiplier for stainless steel |
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What is Quilting |
Bending process applied to mirror finishes to reduce glare and to enhance appearance |
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What finishes is Quilting used on |
All brushed finishes from number four on |
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What is the spring back on stainless steel compared to mild |
Usually twice that of mild Steel |
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When riveting what sizes can be driven cold and what sizes can be driven hot |
Diameters up to 1/4 inch can be driven cold diameters over 1/4 in should be driven hot |
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Soft soldering concealed stainless steel joints but it cannot do what |
Hold them together, strong joints must be lock seemed spot welded or riveted |
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Is silver solder more corrosive resistant or less corrosive resistant than stainless steel |
Silver solder is less corrosive resistant however they are usually satisfactory for normal atmospheric conditions |
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At what temperature does the corrosion resistance of stainless steel decrease |
800 degrees Fahrenheit |
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What four points must be remembered when spot welding stainless steel |
Electrode pressure, indentations and discoloration, amperage and current flow times, and timing |
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What must be remembered with electrode pressure |
Increase the pressure at least 50% more than with mild steel, and keep the pressure uniform |
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How can you avoid indentations in discoloration |
Use an electrode with larger contact surface on one side so that the intensity of the compressive forces lowered on that side, place a heavy piece of copper on the finished side |
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What must be remembered about amperage and current flow times |
Lower the amperage, and lower the current flow times |
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What must be remembered about timing |
Choose equipment that can closely control the time |
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How can you tell if a weld has been properly made |
on a test piece a properly made weld will twist on its own plane 60 to 90 degrees before it breaks out |
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What are the four operations 2 grinding a weld to its original finish |
1 rough grinding 2 fine grinding 3 blending and 4 hand finishing |
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On drawings who provides the specifications of standards |
By a qualified consulting firm |
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What standards might product specifications include |
Custom fabricating, walk-in coolers freezers or cupboards, mechanical refrigeration systems, ventilator systems, fire suppression systems, and service enclosures |
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What do shop drawings clearly identify |
The component, dimensions, materials and gauges, construction details, and schematics |
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Who must approve shop drawings before work can proceed |
Architects and or engineers |
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What is the most important asset of a tradesperson |
Being able to properly interpret and apply regulations, building codes and other relevant data |
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What is the area of jurisdiction for the NFPA or National Fire Protection Association |
The design, installation, and use of exhaust system components such as hoods, grease removal devices, exhaust ducts, dampers, air moving devices, and Fire extinguishing Equipment |
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What is the area of jurisdiction for the CSA or Canadian standards Association |
Safety standards for manufactured products |
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What is the area of jurisdiction for ULC or Underwriters Laboratories of Canada |
Standard for manufactured products with fire, accident, or property hazards such as coffee urns stoves Etc |
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What is the area of jurisdiction for the National Building Code |
All restaurant cooking appliances and exhaust equipment |
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What is the area of jurisdiction of the BC Plumbing code |
Supply and waste lines |
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What is the area of jurisdiction of the BC gas code |
Installation requirements for natural gas-burning appliances, sections include requirements for combustion air, venting, and ventilation |
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When can galvanized steel not be used |
In any areas that have contact with food |
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What are the common locations where galvanized steel is used |
Walk-in refrigerators, exhaust Hood plenums, shelves, reinforcements pieces, and wall lining |
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Where is insulation extensively used |
In walk-in refrigerators and coolers |
