In tensile strength, the increase in the gage length measured after specimen fractures within the gage length is called _______
Apercent elongation
Bcreep
Celasticity
Delongation
ESAS · Question Bank
Engineering Materials
241 of 241 questions match · page 6 of 13. Answer in your head first, then check the solution.
What impurity in steel can cause "red shortness", which means the steel becomes unworkable at high temperature?
ASulfur
BSilicon
CManganese
DPhosphorus
What is the process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface?
ACyaniding
BNitriding
CFlame hardening
DInduction hardening
Which of the ff fluids conducts electricity?
AElectrolyte
BWater
CSolution
DAcid
What is defined as a local corrosion damaged characterized by surface cavities?
Acracking
Bpitting
Ccavitation
Derosion
What refers to the removal of zinc from brasses?
ADezinctification
BGraphitization
CStabilization
DDealloying
What is the scaling off a surface in flakes or layers as the result of corrosion?
AExpoliation
BCorrosion fatigue
CScaping
DFretting
What corrosion occurs under organic coatings on metals as fine, wavy hairlines?
AStray current corrosion
BMicrobiological corrosion
CFiliform corrosion
DFretting corrosion
What refers to the deterioration of material by oscillatory relative motion of small amplitude (20 to 100µm) between two solid surfaces in a corrosive environment?
AStray current corrosion
BMicrobiological corrosion
CFiliform corrosion
DFretting corrosion
Indicate the false statement about corrosion
APlastics and ceramics are immune to many forms of corrosion because they are not good conductors of electricity
BThe corroded member in a corrosioncell is the cathode
CPassivity is a prerequisite for the corrosion protection of many metals
DCorrosion of metals is usually electrochemical in nature
Steel is an alloy of iron and carbon with limits on the amount of carbon to less than _______ percent
A2
B3
C4
D1
Indicate false statement about stainless steel?
AThe density of stainless steel is about the same as carbon or low-alloy steels
BStainless steels are poor conductors of heat
CStainless steels are poor conductors of electricity
DStainless steels have tensile moduli greater than those of carbon and alloy steels
What are the four major alloying elements of austenitic stainless steels?
Airon, chromium, carbon and nickel
Biron, chromium, zinc and nickel
Ciron, chromium, carbon and zinc
Diron, chromium, carbon and copper
The electrical resistance of stainless steels can be as much as ________ times that of carbon steel
A5
B6
C10
D15
What refers to shape achieved by allowing a liquid to solidify in a mold?
Acasting
Bmolding
Cforming
Dall of the choices
Which of the ff is NOT a hardware requirement for die casting?
AWater-cooled metal cavities
BMachined metal holding blocks
CEjection mechanism
DMetal mold (matching halves)
What cast iron has nodular or spheroidal graphite?
ADuctile iron
BWrought iron
CGray iron
DWhite iron
What is a process for making glass-reinforced shapes that can be generated by pulling resin-impregnated glass strands through a die?
AContinous pultrusion
BBulk molding
CVacuum bag forming
DResin transfer moulding
What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids?
AAlkaline
BAlkydes
CAlcocids
DAldehyde
What is the AISI-SAE steel designation for nickel 3.50 alloy?
A13XX
B23XX
C25XX
D31XX