Q.1
Mechanical properties of single phase alloys cannot be improved by ____________
  • a) Cold working
  • b) Thermomechanical treatment
  • c) Heat treatment
  • d) Grain refining
Q.2
Second phase present as a continuous network at grain boundaries, gives ___________
  • a) Ductility
  • b) Toughness
  • c) Brittleness
  • d) Corrosion resistance
Q.3
Which microstructure possesses the best combination of ductility and toughness?
  • a) Second phase along grain boundaries
  • b) Second phase at grain boundaries
  • c) Second phase within the matrix
  • d) Second phase uniformly distributed throughout matrix
Q.4
Which shape of second phase particles is preferred?
  • a) Flakes
  • b) Nodules
  • c) Spheroids
  • d) Plates
Q.5
Single phase alloys have better _____ properties than their respective pure metals.
  • a) Electrical
  • b) Thermal
  • c) Mechanical
  • d) Formability
Q.6
Which property deteriorates with a decrease in grain size?
  • a) Ductility
  • b) Tensile strength
  • c) Fatigue
  • d) Creep
Q.7
Which property is measured to decide the density of point defects?
  • a) Electrical resistivity
  • b) Fatigue strength
  • c) Malleability
  • d) Toughness
Q.8
Which one is structure sensitive property?
  • a) Melting point
  • b) Density
  • c) Specific heat
  • d) Ductility
Q.9
Which one is structure insensitive property?
  • a) Fracture strength
  • b) Yield strength
  • c) Elastic modulus
  • d) Electrical conductivity
Q.10
Finer the spheroid second phase particles, better are the mechanical properties.
  • a) True
  • b) False
Q.11
At elevated temperatures, single phase materials are preferred.
  • a) True
  • b) False
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