In grey cast iron, carbon is present in the form of
A.Cementite
B.Flakes
C.Powder
D.Spheroids
E.None of the above
Category: Metallurgy Mcqs
An instrument which is used for measuring temperature variations by change in a metallic resistance is called a
A.Thermopile
B.Bolometer
C.Thennocouple
D.thermo-generator
E.Thermo-galvanometer
Coarse grained steels
A.Are very tough
B.Are less tough
C.Do not have tendency to distort
D.Are denser
E.Are lighter
The process used for making steel is
A.Bessemer converter
B.Open hearth
C.Electric arc
D.High frequency heating
E.Any of the above
Which of the following material has body centred cubic structure?
A.Molybdenum
B.Cadmium
C.Glass
D.Magnesium
E.Zinc.
During burning of grain boundaries
A.regions enriched in carbon are formed in first state of burning
B.non-oxidized cavities and blow holes are formed during second stage
C.iron oxide inclusions are formed in third stage
D.All of the above
The net magnetic moment is zero is case of
A.Ferromagnetic materials
B.Ferrimagnetic materials
C.Anti-ferromagnetic materials
D.All of the above
E.None of the above
The number of atoms per unit cell in BCC is
A.9
B.3
C.4
D.6
E.8
Volume of air required to melt one ton of cast iron in a cupola at N.T.P. is roughly
A.10 cubic metres of air
B.100 cubic metres of air
C.1000 cubic metres of air
D.10000 cubic metres of air
E.100000 cubic metres of air
Which of the following material is viscoelastic in properties?
A.Graphite
B.Rubber
C.Glass
D.Cork
E.None of the above
