Engineering Materials and Metallurgy MCQ

Test your knowledge with important Engineering Materials and Metallurgy MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Engineering Materials and Metallurgy 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
• __________ is used as a catalyst in siliconizing.
  ক

  Hydrogen peroxide

  খ

  Chlorine gas

  গ

  Sulfuric acid

  ঘ

  Magnesium sulfate
• Siliconizing is otherwise known as _________
  ক

  Chromizing

  খ

  Nitriding

  গ

  Ihrigizing

  ঘ

  Oxy-cyaniding
• Chromizing is carried out at a temperature of __________
  ক

  400-600 F

  খ

  800-1200 F

  গ

  1650-2000 F

  ঘ

  2250-2750 F
• Which of the following is a use for flash anodic coatings?
  ক

  Cartridge cases

  খ

  Airplane propeller

  গ

  Paint adherence

  ঘ

  Hydraulic pistons
• The alumilite process uses ________ as an electrolyte for anodizing.
  ক

  Sulfuric acid

  খ

  Hydrogen peroxide

  গ

  Nitric acid

  ঘ

  Ammonium sulfate
• What is the hardness of a rhodium plate?
  ক

  140-425 Vickers

  খ

  540-640 Vickers

  গ

  720-880 Vickers

  ঘ

  950-1050 Vickers
• What are the applications of chromium plating?
  ক

  Plastics

  খ

  Wheel and rims

  গ

  IC engine parts

  ঘ

  Castings
• ________ plating is used for protection against wear in lead bearings.
  ক

  Gallium

  খ

  Arsenic

  গ

  Indium

  ঘ

  Helium
• Which of the following is not a method of shear test?
  ক

  Double sheer system for round bar

  খ

  Double knife shear system for rectangular section

  গ

  Double shear system for conical surfaces

  ঘ

  Shearing of disc using punch and die
• The compressive test is done on which of the following materials?
  ক

  Cast iron

  খ

  Aluminum

  গ

  Gold

  ঘ

  Thermocole
• Tensile testing of metals is done using _________
  ক

  Universal Testing Machine

  খ

  Durometer

  গ

  Tribometer

  ঘ

  Uniaxial Testing Machine
• What is the load that the Vickers hardness test can carry?
  ক

  10 kg

  খ

  120 kg

  গ

  150 kg

  ঘ

  3000 kg
• Which of the following scales are used for testing of very soft thermoplastics?
  ক

  A

  খ

  E

  গ

  H

  ঘ

  R
• Which materials are to be tested using an F-scale?
  ক

  Copper and brass

  খ

  Case hardened steels

  গ

  Bronze, gunmetal, and beryllium copper

  ঘ

  Thermoplastics
• Which of the following is not a Rockwell hardness scale?
  ক

  A

  খ

  E

  গ

  N

  ঘ

  K
• The indenter used in C-scale of Rockwell hardness test is named _________
  ক

  CABAL

  খ

  BRALE

  গ

  BRALL

  ঘ

  IDOL
• How is the Vicker’s hardness number defined as?
  ক

  1.8544PD2

  খ

  1.8544P 1/D2

  গ

  8.544P 1/D2

  ঘ

  8.544PD2
• What is the angle of indenter in Vicker’s hardness test?
  ক

  96 degrees

  খ

  110 degrees

  গ

  136 degrees

  ঘ

  150 degrees
• For how long is the load maintained in a Brinell test?
  ক

  2-4 seconds

  খ

  10-15 seconds

  গ

  20-30 seconds

  ঘ

  45-55 seconds
• What kind of indenter is used in a Brinell test?
  ক

  Diamond cone

  খ

  Steel ball

  গ

  Pen dot

  ঘ

  Long tube