Materials MCQ

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• Which of the following types of wood are used for corrosion applications?
  ক

  Oak, redwood, and pine

  খ

  Pine only

  গ

  Redwood and oak

  ঘ

  Redwood only
• Which of the following is/are the characteristics of carbon and graphite?
  ক

  It has good thermal and electrical conductivity

  খ

  Excellent thermal shock resistance

  গ

  It has good thermal and electrical conductivity, excellent thermal shock resistance, weak and brittle as compared with metals

  ঘ

  Weak and brittle as compared with metals and have excellent thermal shock resistance
• What is the other name of fused quartz?
  ক

  Vitreous silica

  খ

  Amethyst

  গ

  Citrine

  ঘ

  Rutilated quartz
• Which of the following statements regarding glass is/are correct?
  ক

  It is an amorphous inorganic oxide

  খ

  It composed of pure silica

  গ

  It is mostly transparent in nature

  ঘ

  It is an amorphous inorganic oxide, composed of pure silica and mostly transparent in nature
• Acid brick is the material made from fireclay with a silica content about 10% greater than ordinary firebrick.
  ক

  True

  খ

  False
• Which of the following is/are the ultra-tough ceramics that could be used in diesel engines?
  ক

  Silicon carbide and zirconia

  খ

  Silicon carbide, alumina, and zirconia

  গ

  Zirconia only

  ঘ

  Alumina and silicon carbide
• Which of the following is/are the disadvantages of ceramics?
  ক

  Brittle in nature

  খ

  Less tensile strength

  গ

  Less resistance to thermal shocks

  ঘ

  Brittle in nature, less tensile strength and less resistance to thermal shocks
• Which of the following is/are the advantages of ceramics?
  ক

  Resistance to higher temperatures only

  খ

  Better corrosion resistance and resistance to higher temperatures

  গ

  High abrasion resistance

  ঘ

  Resistance to high temperatures, better corrosion resistance, and high abrasion resistance
• Which of the following is/are the examples of ceramics?
  ক

  Brick

  খ

  Stone

  গ

  Fused silica

  ঘ

  Brick, stone and fused silica
• Which of the following compounds that are present in ceramics?
  ক

  Metallic elements

  খ

  Non-metallic elements

  গ

  Both metallic and non-metallic elements

  ঘ

  Neither metallic nor non-metallic elements
• Which of the following is not a thermosetting plastic?
  ক

  Dacron

  খ

  Bakelite

  গ

  Polystyrene

  ঘ

  Polyester
• Which of the following category that materials such as Epon, Durcon, and Araldite belong to?
  ক

  Epoxies

  খ

  Silicones

  গ

  Phenolics

  ঘ

  Polyesters
• Which of the following thermosetting plastics that comes under phenolics?
  ক

  Bakelite

  খ

  Durez

  গ

  Resinox

  ঘ

  Bakelite, Durez, and Resinox
• What is the abbreviation of FRP regarding reinforced plastics?
  ক

  Filtrate-reinforced plastic

  খ

  Fiber-reinforced plastic

  গ

  Filter-reinforced plastic

  ঘ

  Fume-reinforced polymer
• Silicones are used for molding compounds, laminating resins, and insulation for electric motors and electronic equipment.
  ক

  True

  খ

  False
• Which of the following polyester is used in the space mirror satellite?
  ক

  Mylar

  খ

  Dacron

  গ

  Vibrin

  ঘ

  Dypol
• Which of the following is/are the raw materials of Bakelite?
  ক

  Phenol

  খ

  Formaldehyde

  গ

  Both phenol and formaldehyde

  ঘ

  Neither phenol nor formaldehyde
• Which of the following is/are the example of thermosetting polymers?
  ক

  Epoxies

  খ

  Polyesters

  গ

  Phenolics

  ঘ

  Epoxies, polyesters, and phenolics
• What is meant by thermosetting plastic?
  ক

  It softens on heating and returns to original hardness on cooling

  খ

  It hardens on heating and retains hardness on cooling

  গ

  It hardens on heating and returns to original hardness on cooling

  ঘ

  It softens on heating and retains hardness on cooling
• Degradation of plastics is due to swelling, loss of mechanical properties, softening, hardening, and spalling.
  ক

  True

  খ

  False
• Which of the following is the monomer of Polyvinyl chloride (PVC)?
  ক

  CF2=CF2

  খ

  CH2=CH-Cl

  গ

  COOH-CH2-CH2-CH2–CH2COOH

  ঘ

  C6H5-CH=CH2
• Which of the following is/are the examples of thermoplastics?
  ক

  Polypropylene

  খ

  Polystyrene

  গ

  Polyvinyl chloride

  ঘ

  Polypropylene, polystyrene and polyvinyl chloride
• Which of the following is/are the monomers of nylon (6,6)?
  ক

  Hexamethylenediamine

  খ

  Adipic acid

  গ

  Both Hexamethylenediamine and adipic acid

  ঘ

  Neither Hexamethylenediamine nor adipic acid
• Which of the following thermoplastics is used for making eye lenses?
  ক

  Polytetrafluoroethylene

  খ

  Polyethylene terephthalate

  গ

  Polymethyl methacrylate

  ঘ

  Polyvinyl chloride
• Which of the following is the chemical name of nylon (6, 6)?
  ক

  Polyethylene terephthalate

  খ

  Hexamethylene adipamide

  গ

  Polytetrafluoroethylene

  ঘ

  Polyvinyl fluoride
• Which of the following thermoplastic is corrosion-resistant to all environments up to 550°F?
  ক

  Polyvinyl chloride

  খ

  Polystyrene

  গ

  Teflon

  ঘ

  Polyethylene
• What is meant by thermoplastic?
  ক

  It softens on heating and returns to original hardness on cooling

  খ

  It hardens on heating and returns to original hardness on cooling

  গ

  It hardens on heating and retains hardness on cooling

  ঘ

  It softens on heating and retains hardness on cooling
• Which of the following is/are the classification of plastics based on the thermal behavior?
  ক

  Thermoplastics

  খ

  Thermosetting

  গ

  Neither thermoplastics nor thermosetting

  ঘ

  Thermoplastics and thermosetting
• Which of the following factors that affect the corrosion of composites?
  ক

  The corrosive specificity of an environment

  খ

  Galvanic effect

  গ

  Corrosive specificity of an environment and galvanic effect

  ঘ

  Neither the corrosive specificity of an environment nor the galvanic effect
• Metallic composites consist of a metallic matrix strengthened by metallic or nonmetallic fibers, filaments or whiskers.
  ক

  True

  খ

  False