Metal Spraying and Hard Facing, Age Hardening MCQ

Test your knowledge with important Metal Spraying and Hard Facing, Age Hardening MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Metal Spraying and Hard Facing, Age Hardening MCQs at Bissoy

• What is the ductility of age-hardened Al-4.5%Cu alloy?
  ক

  15%

  খ

  20%

  গ

  40%

  ঘ

  55%
• Which of the following is not a stage of the age-hardening process?
  ক

  Heating

  খ

  Quenching

  গ

  Tempering

  ঘ

  Aging
• What is the relation of solubility and temperature for an age-hardening alloy?
  ক

  Increases with decrease in temperature

  খ

  Decreases with decrease in temperature

  গ

  Increases irrespective of temperature

  ঘ

  No change due to temperature
• Increase of hardness of an alloy with an increase in time is known as ________
  ক

  Age hardening

  খ

  Solution hardening

  গ

  Dispersion hardening

  ঘ

  Phase transformation hardening
• Carbon steels containing ________ carbon are easier to hard-face.
  ক

  < 0.35%

  খ

  3.2%

  গ

  5.18%

  ঘ

  > 6.77%
• How does the amount of cobalt affect the wear of alloys?
  ক

  High cobalt high wear

  খ

  Low cobalt high wear

  গ

  No cobalt high wear

  ঘ

  Cobalt does not affect the wear
• What is the hardness of molybdenum powder?
  ক

  168-183 Vickers

  খ

  246-263 Vickers

  গ

  321-368 Vickers

  ঘ

  330-390 Vickers
• Which of the following can be used for hard coating applications?
  ক

  High-chromium stainless steel

  খ

  Heat-treated stainless steel

  গ

  Hardened brass

  ঘ

  Aluminum
• Plasma is metal spraying can obtain temperatures up to ________
  ক

  10,000 F

  খ

  20,000 F

  গ

  30,000 F

  ঘ

  60,000 F
• Usage of ___________ for metallizing helps spray the metal powder in the correct place.
  ক

  Air, oxygen, and combustible gas

  খ

  Oxyacetylene powder gun

  গ

  Silicon dioxide

  ঘ

  Hydrogen peroxide