Quizzes Flashcards
TRUE OR FALSE
Split patterns can produce large quantities of duplicate molds
FALSE
TRUE OR FALSE
Loose piece patterns are expensive but can produce complex shapes
TRUE
TRUE OR FALSE
Green sand mixture contains silica sand, clay and water
TRUE
TRUE OR FALSE
Green sand cast is the least expensive casting method and it can can cast almost any metal except magnesium
FALSE
TRUE OR FALSE
In CO2 molding, hardened sands have very poor collapsibility
TRUE
TRUE OR FALSE
A smooth surface of casting cores is required to function properly
TRUE
In what situation is welding not the best choice?
Heat affects material properties
Joint involves thin materials
Joint involves dissimilar materials
In ________, heat and pressure are combined to induce coalescence.
resistance welding
______ processes create joints without any melting of the workpiece or filler material
Solid-state
____ fasteners are formed areas designed into sheet metal products.
Integral
____ fasteners have separate pieces joining the primary components.
Discrete
TRUE OR FALSE
Nearly all fastener failures can be avoided by proper design and fastener selection
TRUE
What types of primary bonds are the basis for ceramic materials?
covalent and ionic
Traditional and engineering ceramics have crystalline structures, while glasses have _____ structures.
amorphous
TRUE OR FALSE
Ceramics tend to have a high thermal conductivity.
FALSE
What is implied by a high viscosity?
resistant to flow
Multiple use molds are generally made of ____.
metal
TRUE OR FALSE
One drawback of multiple use molds is that they have limited part sizes
TRUE
____ casting produces more products than any other casting process.
Die
In the _______ process, molten metal is cooled to the semisolid state with constant stirring and then subjected to high pressure injection into a metal die.
rheocasting
Another name for joining is ___________.
consolidation processes
______ is the dominant method of joining in manufacture.
Welding
In _____ welding, molten material is produced and high temperatures accelerate the reactions between the metal and its surroundings.
fusion
What does a high quality weld require?
a source of satisfactory heat/ pressure
a means of cleaning the metals to be joined
caution to compensate for harmful metallurgical effects
