Exam (elaborations)
IMSE 250 (2)
Exam of 5 pages for the course Imse 250 at Imse 250 (IMSE 250 (2))
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IMSE 250A student gets 100% on all exams but has not done any homework or quizzes. The best grade
this student can get is a... - ANS-D
Make up quizzes ____________ be given - ANS-will not
Online homework assignments are due - ANS-Friday at 11:59 pm
Which one of the following statements is false if you miss an exam for this course? - ANS-You
cannot retake it since no make-up exams will be given
True or False. Manufacturing in the U.S. will all be moved to other countries. - ANS-False
The United States accounts for about _______% of global manufacturing in 2013 - ANS-18
About ________% of the U.S. GDP came from US manufacturing - ANS-13
What kind of property is density a part of? Mechanical or physical? - ANS-Physical properties
If the young's modulus of AISI 4140 steel is 1, which value will most likely be the young's
modulus of plastics? - ANS-0.1
Can the young's modulus of a material be greatly changed by manufacturing processes? -
ANS-No
Can the yield strength of a material be greatly changed by manufacturing processes? - ANS-Yes
If the tensile strength of AISI 4140 steel is 1, which value will most likely be the tensile strength
of ceramics? - ANS-0.5
Can the ductility of a material be greatly changed by manufacturing processes? - ANS-Yes
Why is it hard to bend a paper clip back to it's original shape after bending it - ANS-Yield
strength increased by strain hardening
Generally speaking, as tensile strength increases, hardness - ANS-increases
What is not a purpose of heat treatment - ANS-To alter the shape of a part
What are the purposes of heat treatment - ANS-1. Increase strength and hardness
2. Decrease strength and hardness
, 3. Harden only the surface of a part without changing the interior properties
What is the most common heat treatment process? - ANS-Hardening
Steels are Fe-C alloys with less than about ______% Carbon content - ANS-2
What quenching media quenches fastest? - ANS-Water
Two products that usually need surface hardening are... - ANS-Shafts and gears
Which heat treatment process will give the maximum ductility to a machined metal part -
ANS-Full annealing
With heat treatment of steel parts, the faster the cooling rate, the ___________ the parts will be
after the heat treatment - ANS-harder
What heat treatment method cannot improve the treated metal's machinability? -
ANS-Quenching
In tempering, the workpiece needs to be heated below the - ANS-lower transformation
temperature
In annealing, the workpiece needs to be heated to the - ANS-upper transformation temperature
In normalizing, the workpiece needs to be heated above the - ANS-upper transformation
temperature
Normalizing gives ____________ steel than full annealing - ANS-stronger and more brittle
A steel bar is heated to a certain temperature and kept at that temperature for a long time.
Which diagram would you use to find out the crystallization structure of this steel at that
temperature? - ANS-Equilibrium diagram
A steel bar is heated to a high temperature and kept at that temperature for a long time. It then
is cooled down to ambient temperature at a constant given cooling rate. Which diagram would
you use to find out the crystallization structure of this steel at the ambient temperature -
ANS-Continuous cooling transformation diagram
(CCT)
Which one of the following material properties is the most important to determine if Chon and
Roy could succeed in their attempt to escape? - ANS-Young's modulus
If the bars were made from aluminum instead of steel, would Chon and Roy's escape be easier?
- ANS-Yes
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