Exam (elaborations)
Imse 250 Final (2).
Exam of 6 pages for the course Imse 250 at Imse 250 (Imse 250 Final (2).)
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Imse 250 Final______ occurs on the tool face that interacts with the newly-generated surface of a workplace -
ANS-Flank wear
A steel part os heated to a very high temperature and kept at the tempter e for a long time. It is
then cooled down to room temperature at a given rate. Which digram would you use to find out
the structure of this steel at room temperature? - ANS-Coninuous-Cooling-Transformation
diagram
Abrasive waterjet machining belongs to ______ non-traditional machining processes. -
ANS-mechanical
Abrisive machining is a mixture of_______ - ANS-cutting, plowing, and rubbing.
All wafer manufacturing processes are non traditional machining methods. - ANS-False
Between lapping and grinding, which one has higher MRR? - ANS-Grinding
Between lapping and grinding, which one uses fixed abrasives? - ANS-Grinding
Between wire-sawing and ID swing, which one yields more wafers per unit length of crystal
ingot? - ANS-Wire Sawing
Both ultrasonic machining and rotary ultrasonic machining can machine square cavities? -
ANS-False
Bow and twist are associated with _________. - ANS-Shearing
Brass is an alloy of copper and zinc. - ANS-True
Brazing involves melting both the filler material and the workplace. - ANS-False
Can casting be used to make plastic parts? - ANS-Yes
can the young;s modulus of a sheet metal be greatly changed by the cold working bending
process? - ANS-No
Close pockets are usually machined by________ - ANS-End milling
Density is one of material _______ properties. - ANS-Physical
, Die casting can typically produce parts with ______ dimensional precision and surface qualities
than sand casting. - ANS-Better
Dimple method is used to measure______ - ANS-Subsurface damage
Drawing operation is easier if less force is required. - ANS-True
Ductility is_______ - ANS-the ability of a material to bend of stress before it fractures
During a clip-breaking process, the yield strength of steel will be_________. - ANS-Increased
During this clip-breaking process, the ultimate tensile strength of the steel will be_________. -
ANS-Increased
During this clip-breaking process, the Young's modulus of the steel will be________. - ANS-The
same
Even if we have a process that is in control, which causes of citation will still exist in the
process? - ANS-Chance causes
For a given uncut chip thiscness, a small shear angle means a ______ cutting force. -
ANS-High
For a standard twist drill, the cutting speed along with the main cutting edges is________ -
ANS-Different at different points
For either slab of face milling, surfaces can be generated by two different methods: up milling
and down milling. In which method a higher clamping force is needed to hold the workplace? -
ANS-Up milling
Forging processes tend to make parts with ______ grain flow. - ANS-Directional.
Full annealing gives ______ steel than normalizing. - ANS-Weaker and more ductile
Generally speaking, the _______ the rake angle, the sharper cutting edge. - ANS-Larger
Grain size, bond type and pore size all affect wheel performance. Which is not true. -
ANS-Grinding wheel labeled by a larger mesh size usually produces rougher surfaces.
Grinding operation is widely used in automotive industry, but has no applications in
semiconductor industry - ANS-False
If you want a larger boule diameter, which pull rate should be used? - ANS-Slower
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