MAE 364 Test 1 Exam UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
How does solidification of alloys differ from solidification of pure metals - CORRECT
ANSWER Pure metals have a clearly defined melting or freezing points wegere alloys
melt or solidify at a range of temperatures
heat of Fusion - CORRECT ANSWER Amount of heat required for the metal to go
from a liquid to a solid
Three sources of contraction in a metal casting after pouring - CORRECT
ANSWER 1.) Contraction of molten metal
2.) solidification shrinkage during transformation from liquid to solid
3.) thermal contraction in the solid state
How does increasing temperature affect the parameters in the flow curve equation? -
CORRECT ANSWER Both K and n DECREASE as temperature increases
Advantages of cold working in relation to warm and hot working - CORRECT
ANSWER 1.)Greater accuracy
2.)better surface finish
3.)high strength and hardness
4.)no heating of work required
Identify some important advantages of shape-casting processes - CORRECT
ANSWER 1.) can create complex part geometries
2.) can create both external and internal shapes
3.) Can produce very large products
Some limitations and disadvantages of casting - CORRECT ANSWER 1.)
environmental hazards
, 2.) safety hazards to workers due to molten metals
3.) poor dimensional accuracy
4.) Poor surface finish
What is a factory that performs casting operatons usually called? - CORRECT
ANSWER Foundry
Difference between an open mold and a closed mold - CORRECT ANSWER Open
mold-similar geometries
closed mold- more complex geometries with gating system leading into the cavity
Two basic mold types that distinguish casting processes - CORRECT
ANSWER Expendable and Permanent
Commercially the most important casting process - CORRECT ANSWER Sand casting
- Mold made from a sand mixture
Difference between a pattern and a core in sand molding - CORRECT
ANSWER Pattern is made into the shape of the desired part
core is a mold cavity that produces the external surfaces of the cast part
T/F
Manufacturing processes or operations can be categorized by equipment or machine type -
CORRECT ANSWER TRUE
Taxonomy - CORRECT ANSWER Classification based from phase change, structure
change, deformation processes, mass change, and consolidation processes
Casting - CORRECT ANSWER Phase change processes
QUESTIONS AND CORRECT ANSWERS
How does solidification of alloys differ from solidification of pure metals - CORRECT
ANSWER Pure metals have a clearly defined melting or freezing points wegere alloys
melt or solidify at a range of temperatures
heat of Fusion - CORRECT ANSWER Amount of heat required for the metal to go
from a liquid to a solid
Three sources of contraction in a metal casting after pouring - CORRECT
ANSWER 1.) Contraction of molten metal
2.) solidification shrinkage during transformation from liquid to solid
3.) thermal contraction in the solid state
How does increasing temperature affect the parameters in the flow curve equation? -
CORRECT ANSWER Both K and n DECREASE as temperature increases
Advantages of cold working in relation to warm and hot working - CORRECT
ANSWER 1.)Greater accuracy
2.)better surface finish
3.)high strength and hardness
4.)no heating of work required
Identify some important advantages of shape-casting processes - CORRECT
ANSWER 1.) can create complex part geometries
2.) can create both external and internal shapes
3.) Can produce very large products
Some limitations and disadvantages of casting - CORRECT ANSWER 1.)
environmental hazards
, 2.) safety hazards to workers due to molten metals
3.) poor dimensional accuracy
4.) Poor surface finish
What is a factory that performs casting operatons usually called? - CORRECT
ANSWER Foundry
Difference between an open mold and a closed mold - CORRECT ANSWER Open
mold-similar geometries
closed mold- more complex geometries with gating system leading into the cavity
Two basic mold types that distinguish casting processes - CORRECT
ANSWER Expendable and Permanent
Commercially the most important casting process - CORRECT ANSWER Sand casting
- Mold made from a sand mixture
Difference between a pattern and a core in sand molding - CORRECT
ANSWER Pattern is made into the shape of the desired part
core is a mold cavity that produces the external surfaces of the cast part
T/F
Manufacturing processes or operations can be categorized by equipment or machine type -
CORRECT ANSWER TRUE
Taxonomy - CORRECT ANSWER Classification based from phase change, structure
change, deformation processes, mass change, and consolidation processes
Casting - CORRECT ANSWER Phase change processes
