What is the function of a flux in brazing and soldering?
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Flux removes/inhibits oxide layers and promotes wetting of the surface
,Describe a draft?
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it is the amount of taper for molded or cast parts perpendicular to parting
line; by tapering the sides of a mold by an appropriate "draft angle", the
mold will be easier to remove
Name the three most common machining processes.
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Turning, milling and drilling
Two types of welding?
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Solid state welding (heat + pressure) and Fusion welding (melting)
What is vulcanization?
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, a chemical process for converting rubber/polymers into more durable
materials by the addition of sulfur (or other equivalent "curatives" or
"accelerators")
Most external threaded fasteners are produced by?
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machining, cold forming/cold heading and manual die
How does shear spinning/flow forming differ from spinning?
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in shear spinning a reduction of the wall thickness occurs.
Why are surface and cylindrical grinding processes technologically and commercially
important?
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fine surface finish and very close tolerance
Three steps in powder metallurgy include:
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, blending, compaction, sintering
What is a procedure applied to worn grinding wheels to expose fresh abrasive grit
and remove chips that have clogged the wheel?
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Dressing
Describe the surface finish symbol.
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Surface finish is shown with a check and a number. That number is in micro
inches (μin).
Which allowing element is most commonly associated with stainless steels?
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Chromium (most likely)
Chromium is the element that prevents rust, and is found in all stainless
steels
What is bend allowance?
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Flux removes/inhibits oxide layers and promotes wetting of the surface
,Describe a draft?
Give this one a try later!
it is the amount of taper for molded or cast parts perpendicular to parting
line; by tapering the sides of a mold by an appropriate "draft angle", the
mold will be easier to remove
Name the three most common machining processes.
Give this one a try later!
Turning, milling and drilling
Two types of welding?
Give this one a try later!
Solid state welding (heat + pressure) and Fusion welding (melting)
What is vulcanization?
Give this one a try later!
, a chemical process for converting rubber/polymers into more durable
materials by the addition of sulfur (or other equivalent "curatives" or
"accelerators")
Most external threaded fasteners are produced by?
Give this one a try later!
machining, cold forming/cold heading and manual die
How does shear spinning/flow forming differ from spinning?
Give this one a try later!
in shear spinning a reduction of the wall thickness occurs.
Why are surface and cylindrical grinding processes technologically and commercially
important?
Give this one a try later!
fine surface finish and very close tolerance
Three steps in powder metallurgy include:
Give this one a try later!
, blending, compaction, sintering
What is a procedure applied to worn grinding wheels to expose fresh abrasive grit
and remove chips that have clogged the wheel?
Give this one a try later!
Dressing
Describe the surface finish symbol.
Give this one a try later!
Surface finish is shown with a check and a number. That number is in micro
inches (μin).
Which allowing element is most commonly associated with stainless steels?
Give this one a try later!
Chromium (most likely)
Chromium is the element that prevents rust, and is found in all stainless
steels
What is bend allowance?
