What ASTM test for tension is designated for plastics?
AA370
BD638
CE292
DC674
ESAS · Question Bank
Engineering Materials
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What ASTM test for compression is designated for plastics?
AD638
BD695
CD790
DD732
What ASTM test for shear strength is designated for plastics?
AD732
BD790
CD695
DD638
What is the ASTM tension designation for standard methods for steel products?
AA370
BE345
CE8
DC674
Low quality steels with an M suffix on the designation intended for nonstructural application is classified as _________
AMerchant quality
BCommercial quality
CDrawing quality
DSpecial quality
The use of acids to remove oxides and scale on hot-worked steels is known as ______
ATempering
BPickling
CMachining
DGalvanizing
What is the purpose of molybdenum in steel alloying?
ATo increase brittleness
BTo increase dynamic and high temperature strength and hardness
CTo reduce brittleness, combine with sulfur
DTo increase corrosion and resistance
Which of the ff statements is NOT true?
AAbout 10% of the earth's crust is iron
BPure iron does not have significant industrial use because it is too weak and soft
CSteel is an alloy of carbon and iron with limit on the amount of carbon (less than 2 %)
DSteel is made by reducing oxide ore of iron by thermochemical reactions in a blast furnace or direct reduction vessel
What prefix in steel identification means composition varies from normal limits?
AE
BH
CX
DB
What prefix in steel identification means it is made in an electric furnace?
AE
BH
CX
DB
What letter suffix in steel identification means that it is steel with boron as an alloying element?
AxxLxx
BxxBxx
CxxHxx
DxxKxx
What refers to the tin mill steel without a coating?
AWhite plate
BTin steel free
CBlack plate
DDechromate tin
What combination has high electrical resistance, high corrosion resistance, and high strength at red heat temp, make it useful in resistance heating?
AAluminum bronze
BNichrome
CHastelloy
DAlnico
A steel cannot qualify for stainless prefix until it has at least how many percent of chromium?
A10 %
B20 %
C25 %
D5 %
What do you add to compensate for the remaining high iron oxide content of the steel?
ADeorizers
BDeoxidizers
CDeterrent
DDetoxifiers
Which of the ff cast irons is a high-carbon, iron-carbon-silicon alloy?
AGray iron
BMalleable iron
CWhite iron
DAlloy iron
Which of the ff cast irons is heat treated for ductility?
AGray iron
BMalleable iron
CWhite iron
DDuctile iron
Which cast iron is hard and wear resistant?
AGray iron
BDuctile iron
CWhite iron
DMalleable iron
What is considered as the general purpose, oldest type and widely used cast iron?
AGray iron
BDuctile iron
CAlloy iron
DMalleable iron
What is the effect of manganese in cast iron?
ATo affect the machinability, ductility, and shrinkage depending on form
BTo reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.5%
CTo deoxidize molten cast iron
DTo increase fluidity and lowers melting temperature