Exam (elaborations)
IMSE 250 Quiz -10 through -23 (1).
IMSE 250 Quiz -10 through -23 (1).
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IMSE 250 Quiz #10 through #23Most cutting processes are __________
(A) three-dimensional. (B) orthogonal cutting. - ANS-A
Generally speaking, the _______ the rake angle, the sharper the cutting edge.
(A) larger (B) smaller - ANS-A
As shear angle increases, the chip thickness ________
(A) increases. (B) decreases. - ANS-B
The magnitude of the shear angle is of fundamental importance. For any given uncut chip
thickness, a small shear angle means a ______ cutting force.
(A) high (B) low - ANS-A
When the dept of cut increases, the cutting force will typically __________.
(A) increase (B) decrease - ANS-A
According to the video, when the cutting fluid is applied into cutting zone, many things will
happen. Which one of the following will NOT happen?
(A) The shear angle increases.
(B) Cutting temperature decreases.
(C) BUE disappears.
(D) Power consumption decreases.
(E) Actual clearance angle decreases. - ANS-E
An ideal cutting fluid has many benefits. Which one of the following is NOT one of these
benefits?
(A) To increase tool life.
(B) To create no or less rust on machine tool.
(C) To create no or less pollution to environment.
(D) To increase the yield strength of workpiece material. - ANS-D
The desired qualities for an ideal tool material are: harder than workpiece; retain hardness at
high temperature; resist wear and thermal shock; impact resistant; chemically inert. Which one
of the following tool materials incorporates all these qualities?
(A) Diamond. (B) Ceramics. (C) HSS. (D) None of them. - ANS-D
Which deposition method has higher depositing temperature?
(A) CVD (Chemical Vapor Deposition). (B) PVD (Physical Vapor Deposition). - ANS-A
, A friend of yours has got a job as an applications engineer in a grinding wheel company (he
goes to customers' sites to conduct grinding tests, demonstrating the high performance of their
grinding wheels.) They have two types of superabrasives grinding wheels: diamond and CBN.
His customers mainly manufacture steel parts for automobile industry. He knows you have taken
IMSE 250 and comes to you for advice. Which type of superabrasives should he choose?
(A) Diamond. (B) CBN. - ANS-B
Flank wear occurs on _______________
(A) the tool face that interacts with the newly-generated chip.
(B) the tool face that interacts with the newly-generated surface of workpiece. - ANS-B
Generally speaking, a decrease in cutting speed will ____________ the tool life.
(A) increase (B) decrease - ANS-A
Whether the chip is continuous or discontinuous is determined by several factors. Which one of
the following has the least effects on the chip type?
(A) Machine tool horsepower. (B) Workpiece material (brittle or ductile).
(C) Cutting speed. (D) Tool rake angle.
(E) Whether the cutting tool is in continuous contact with workpiece. - ANS-A
For a standard twist drill, the rake angle along the main cutting edges (lips) is _________
(A) different at different point. (B) the same everywhere - ANS-A
Which one of the following orders represents the surface roughness order (from the roughest to
the smoothest) generated by these processes?
(A) Honing > Reaming > Drilling. (B) Reaming > Drilling > Honing.
(C) Drilling > Reaming > Honing. (D) Drilling > Honing > Reaming - ANS-C
Holes are drilled in a part. It is found that the hole surface is too rough. You are asked to judge if
the following ideas will improve the surface quality.
Use a honing operation after drilling.
(A) Probably will. (B) Will not. - ANS-A
Holes are drilled in a part. It is found that the hole surface is too rough. You are asked to judge if
the following ideas will improve the surface quality.
Increase drill rotational speed.
(A) Probably will. (B) Will not. - ANS-A
Holes are drilled in a part. It is found that the hole surface is too rough. You are asked to judge if
the following ideas will improve the surface quality.
Increase feedrate.
(A) Probably will. (B) Will not - ANS-B
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