Bell metal is an alloy of
A.Coper, tin, lead and zinc
B.Copper, antimony, aluminium and zinc
C.Copper, lead and tin
D.Copper and tin
E.Copper and lead
Category: Metallurgy Mcqs
On Moh’s scale, materials with hardness number less than 4 are
A.Topaz, Corundum, Diamond
B.Talc, gypsum, calcite
C.Fluorite, Felsper, Talc
D.Felspar, corundum, Diamond
Which of the following temperatures represents the tempering temperature for C 30 steel?
A.1700?C
B.1400-1450?C
C.860-890?C
D.550-660?C
E.100-150?C
Spherical metal powders are usually produced by
A.Electrolytic process
B.Automization
C.Reduction
D.Oxidation
E.Milling
The rollers of a cycle chain are subjected to
A.Compressive stress
B.Tensile stress
C.Shear stress
D.Fatigue stress
E.Creep stress
During dielectric heating, the heat is generated primarily due to
A.Eddy currents
B.Stray magnetic fields
C.High voltage
D.High power consumption
E.High flux density
Which of the following gives a fracture crystalline in appearance?
A.Steel
B.Wrought iron
C.Cast iron
D.All of the above
E.None of the above
There are 14 atoms in a unit cell of
A.Body centred cubic space lattice
B.Face centred cubic space lattice
C.Close packed hexagonal space lattice
D.All of the above
E.None of the above
Insufficient hardness after tempering may be due to
A.tempering temperature too low
B.tempering temperature too high
C.oxidising atmosphere in the furnace
D.Any of the above
Which of the following affects the hardenability of steel?
A.Austenitic composition
B.Austenitic grain size
C.Amount, nature and distribution of undissolved or insoluble particles in austenite
D.All of the above
