Carburizing is done
A.On steel with carbon percentage of 0.7%
B.On steels with carbon percentage of 0.5%
C.To improve hardenability of steel
D.By heating 200?C below critical temperature
E.To induce soft surface for machining on a hard core
Category: Engineering Materials Mcqs
Spring steels should have high resistance to
A.Shocks
B.Fatigue
C.Corrosion
D.Deformation
E.All of the above
Steel may be manufactured by
A.Bessemer process
B.Open hearth process
C.Cementation process
D.Duplex process
E.Any of the above
One of the objects of annealing is
A.To soften the metal
B.to improve machinability
C.To refine grain structure
D.To refine internal stresses
E.All above
Gamma iron exists at temperatures in the range
A.Room temperature and lower critical temperature
B.Between 500?C and 850?C
C.Between 900?C and 1400?C
D.Between 1400?C and 1600?C
E.Above 1600?C
The amount of energy expended by the action of external force in deforming an elastic body is known as
A.Elastic energy
B.Deformation energy
C.Work done
D.Potential energy
E.Strain energy
In carbon steel castings
A.The percentage of carbon is less than 1.7%
B.The percentage of carbon is between 1.7% to 2%
C.The percentage for alloying elements is controlled
D.(A) and (C) above
E.(B) and (C) above
Delta iron occurs at temperature in the range of
A.Room temperature to 600?C
B.600?C to critical temperature
C.Between 800?C and 1200?C
D.Between 1400?C and 1530?C
E.None of the above
Eutectic is
A.a phase transformation in which all the liquid phase transforms on cooling to two solid phases simultaneously
B.A phase transformation which occurs above the glass transition temperature
C.a solid solution of one component in another
D.None of the above
Thermosetting polymers are
A.Injection moulded
B.Extruded
C.Cast moulded
D.None of the above
