ENGM 445 Mid Term Study Set (Chapter 11) Question and answer rated A+

ENGM 445 Mid Term Study Set
(Homework 4)
1. One of the following is the best match
Greater accuracy (closer toler-
for all the characteristics/descriptions
ances obtained), better
listed on the right with the ones on the
surface finish, higher strength
left.
and hard- ness of the part,
directional prop- erties due to
(a)Cold working
grain flow.
2. One of the following is the best match The shape of the work part can
for all the characteristics/descriptions be significantly altered, lower
listed on the right with the ones on the forces and power required,
left. usually less fracture to the
metal, strength properties are
(b) Hot working generally isotropic, no
strengthening of the part due
to strain hardening.

3. Strain rate sensitivity is greatest under Hot working.
which of the following situation(s)?
-a) cold working
-b) hot working
-c) warm working
-d) b and c

4. What is sticking friction in metalworking? All. Sticking friction is when
-a) It is a phenomena that occurs when the work surface adheres to
the work surface adheres to the surface of the sur- face of the tool rather
the tool rather than slides against than slides against it; it occurs
-b) It is a phenomena that occurs when when the fric- tion stress is
the fric- greater than the
tion stress is greater than the shear flow stress of shear flow stress of the
metal. It

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, ENGM 445 Mid Term Study Set
(Homework 4)
the metal. is generally associated with
-c) It is generally associated with hot hot working.
working.
-d) a and c
-e) all




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