Free cutting steels usually have sulphur content of
A.0.002 percent
B.0.02 percent
C.0.21 percent
D.2 percent
E.10 percent
Category: Metallurgy Mcqs
Formation of thick layer of scale on the surface of steel articles can be minimised by
A.heating in furnaces with reducing neutral or protective atmosphere
B.heating in boxes with used carburising agent or cast iron chips
C.heating in molten salt bath
D.Any of the above
Invar is an alloy of
A.Iron and nickel
B.Iron and copper
C.Iron and zinc
D.Iron and chromium
E.Iron and vanadium
Annealing treatment is normally used for
A.Forgings
B.Cold worked sheets
C.Wires
D.Castings
E.All of the above
Which of the following is usually made of high carbon steel?
A.Hammers
B.Angle iron
C.Solid drawn tubes
D.Channels
A fine grained steel will have the number of grains per square centimeter as
A.3 to 16
B.16 to 56
C.56 to 100
D.100 to 150
E.150 to 1000
Above the curie temperature, a magnetic material becomes
A.Diamagnetic
B.Paramagnetic
C.Ferromagnetic
D.Dielectric
E.None of the above
In tool steel the percentage of silicon is usually restricted to
A.0.2 percent
B.0.5 percent
C.1 percent
D.2 percent
E.5 percent
Which hardening process is generally not used for steels?
A.Induction hardening
B.Age hardening
C.Nitriding
D.Pack carburising
E.Cyanidin
Hypoeutectoid steel has the structure of
A.Cementite
B.Pearlite
C.Ferrite
D.Ferrite & pearlite
E.None of the above
