The phenomenon of materials in which slow extension of materials takes place with the time at constant load is known as
A.Plasticity
B.Elasticity
C.Malleability
D.Ductility
E.Creep
Category: Engineering Materials Mcqs
In case of eutectoid steels which one of the following structures has the maximum hardness?
A.Pearlite
B.Sorbite
C.Troosite
D.Acicular
E.Martensite
The main constituent of dynamite is
A.Sulphur
B.Potassium chlorate
C.Oxygen
D.Nitroglycerine
E.Sodium nitrate
Gamma iron has
A.Body centred space lattice structure containing 6 atoms
B.Body centred space lattice structure containing 10 atoms
C.Face centred space lattice structure with 8 atoms
D.Face centred space lattice structure with 14 atoms
E.None of the above
The variable stress below which the probability of failure of a material is negligible, is called
A.Elastic limit
B.Plastic limit
C.Yield point
D.Endurance limit
E.Tolerance limit
The material for wire drawing should have
A.High hardness
B.High ductility
C.High melting point
D.Low boiling point
E.Stiffness
Which material has the best damping capacity
A.High speed steel
B.Stainless steel
C.Mild steel
D.Cast iron
E.Diamond
The purpose of annealing is to
A.Induce hardness
B.Induce stresses
C.Harden the surface
D.Produce irregular microstructure
E.Remove stresses
Which one is different from the others in press work operations?
A.Coining
B.Sizing
C.Flattening
D.Riveting
E.Punching
The process in which steel is heated 20? to 40?C below the lower critical temperature, held there for a prolonged period and then allowed to cool slowly in the furnace is known as
A.Normalising
B.Annealing
C.Spheroidising
D.Tempering
E.Austempering
