A steel cannot qualify for stainless prefix until it has at least how many percent of chromium?
A10 %
B20 %
C25 %
D5 %
ESAS · Question Bank
Engineering Materials
10 of 241 questions match. Answer in your head first, then check the solution.
Which of the ff cast irons is heat treated for ductility?
AGray iron
BMalleable iron
CWhite iron
DDuctile iron
In tensile strength, the increase in the gage length measured after specimen fractures within the gage length is called _______
Apercent elongation
Bcreep
Celasticity
Delongation
Manganese steel usually contains how many percent of manganese?
A1 to 5
B5 to 10
C11 to 14
D14 to 18
What is the minimum tensile strength of Gray Cast Iron class 50?
A25000 lbf/in²
B35000 lbf/in²
C50000 lbf/in²
D100000 lbf/in²
Alnico is an alloy containing how many percent nickel?
A10 %
B14 %
C18 %
D22 %
What gives the average ratio of stress to strain for materials operating in the nonlinear region in the stress strain diagram?
AModulus of elasticity
BProportionality limit
CSecant modulus
DTangent modulus
What test determines the hardenability of a steel specimen?
AJominy end-quench test
BThe lever rule
CGibb's phase test
DStress relief test
Yellow brass is a copper alloy with improved mechanical properties but reduced corrosion resistance and electrical conductivity. How many percent of yellow brass is copper?
A65 %
B35 %
C55 %
D45 %
What element is added to copper to increase its strength and fatigue properties?
Asilicon
Baluminum
Cberyllium
Dzinc