Q.1
Which of the following is a dynamic hardness test?
  • a) Brinell
  • b) Poldi
  • c) Knoop
  • d) Vickers
Q.2
What is the standard height of impact for shore test?
  • a) 125 mm
  • b) 250 mm
  • c) 500 mm
  • d) 750 mm
Q.3
What is a weight of hammer in shore test?
  • a) 2.0 gm
  • b) 2.3 gm
  • c) 2.4 gm
  • d) 3.0 gm
Q.4
As the height of rebound enhances the material’s hardness ___________
  • a) Increases
  • b) Decreases
  • c) First Increases and then decreases
  • d) Remains constant
Q.5
Specimen less than 1 kg must be clamped because of ________
  • a) Elastic recovery
  • b) Penetration
  • c) Inertial effect
  • d) Personal error
Q.6
What is a disadvantage of shore test?
  • a) Very slow
  • b) Deep indentation
  • c) Clamping problem
  • d) Heavy machinery
Q.7
Which test should be preferred for finished lathe machine bed?
  • a) Brinell
  • b) Poldi
  • c) Shore
  • d) Rockwell
Q.8
What is the height of Poldi apparatus?
  • a) 10 mm
  • b) 100 mm
  • c) 150 mm
  • d) 250 mm
Q.9
What is the disadvantage of Poldi hardness test?
  • a) Expensive
  • b) Not portable
  • c) Not accurate
  • d) Can’t perform on heavy machinery
Q.10
Poldi hardness test gives a value of ________ also along with dynamic hardness.
  • a) Yield strength
  • b) Tensile strength
  • c) Toughness
  • d) Young’s modulus
Q.11
Tensile strength is given in tonnes per square inch in Poldi test.
  • a) True
  • b) False
Q.12
Hardness of heavy components can’t be measured by Poldi test.
  • a) True
  • b) False
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