INSULATING / WATER PROOFING MATERIALS

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• Q1: Define Rigid materials.
  Ans: The materials that do not bend, stretch, or change shape easily are called Rigid materials.
• Q2: Name some Rigid materials.
  Ans: Some rigid materials are as follows:

  • ➔ Wood
  • ➔ Metal
  • ➔ Glass
  • ➔ Ceramics
• Q3: Define Flexible materials.
  Ans: Flexible materials are materials that can bend, stretch, or change shape without breaking.
• Q4: Name some Flexible materials.
  Ans: Some flexible materials are as follows:

  • ➔ Rubber
  • ➔ Plastic
  • ➔ Cloth
  • ➔ Leather
• Q5: Write the classification of rigid materials.
  Ans: Rigid materials are classified as follows:

  • ➔ Metals
  • ➔ Non-metals
  • ➔ Composites
• Q6: Define Wood.
  Ans: Wood is a natural material obtained from trees and used for construction and manufacturing.
• Q7: Define Glass.
  Ans: Glass is a hard, transparent material made by heating sand and other substances. It is also used for construction works and finishing.
• Q8: Define Ceramic.
  Ans: Ceramic is a hard material made by shaping and heating clay at high temperatures.
• Q9: State the properties of ceramics.
  Ans: Ceramics are strong, heat-resistant, corrosion-resistant, and brittle.
• Q10: Define Synthetic fibre.
  Ans: Synthetic fibre is a man-made fibre produced from chemicals.
• Q11: State the classification of Synthetic fibre.
  Ans: Synthetic fibres are classified into:

  • ➔ Polyester
  • ➔ Nylon
  • ➔ Acrylic
  • ➔ Rayon
• Q12: Define Polyester.
  Ans: Polyester is a man-made fiber. It is used to make fabrics and clothing.
• Q13: Define Bitumen.
  Ans: Bitumen is a black, sticky, waterproof material obtained from petroleum. It is used for waterproofing.
• Q14: What is Bitumen used for?
  Ans: Bitumen is used for road construction, waterproofing, and roofing.
• Q15: Define Bamboo.
  Ans: Bamboo is a strong, lightweight natural material obtained from bamboo plants. It is used in construction works and furniture.
• Q16: Define Sound Insulation.
  Ans: Sound insulation is the process of reducing the amount of sound entering or leaving a space.
• Q17: Define Insulation.
  Ans: Insulation is the method of preventing heat, sound, or electricity from passing through a material.
• Q18: Define Insulating materials.
  Ans: Insulating materials are materials that reduce the flow of heat, sound, or electricity.
• Q19: State the properties of Insulating materials.
  Ans: The properties of insulating materials are:

  • ➔ Lightweight
  • ➔ Poor conductors
  • ➔ Moisture-resistant
  • ➔ Durable
• Q20: Name some Insulating materials.
  Ans: Some insulating materials are as follows:

  • ➔ Fiberglass
  • ➔ Mineral wool
  • ➔ Cellulose
  • ➔ Polystyrene
• Q21: Define Thermal Insulation.
  Ans: Thermal insulation is the reduction of heat transfer between objects or spaces.
• Q22: Name some Thermal Insulating materials.
  Ans: Some thermal insulating materials are as follows:

  • ➔ Fiberglass
  • ➔ Mineral wool
  • ➔ Cellulose
  • ➔ Foam boards
• Q23: Define Fibreglass.
  Ans: Fibreglass is an insulating material made from fine glass fibres.
• Q24: Define Mineral wool.
  Ans: Mineral wool is an insulating material made from melted rock or industrial waste spun into fibres.
• Q25: Define Cellulose.
  Ans: Cellulose is an insulating material made from recycled paper treated with chemicals.
• Q26: Define Polystyrene.
  Ans: Polystyrene is a lightweight plastic foam. It is used for insulation.
• Q27: State the factors affecting the selection of building insulation.
  Ans: The factors include:

  • ➔ Cost
  • ➔ Climate
  • ➔ Durability
  • ➔ Safety
  • ➔ Moisture resistance
  • ➔ Thermal performance
• Q28: Name some Sound Insulating materials.
  Ans: Some sound insulating materials are:

  • ➔ Acoustic foam
  • ➔ Mineral wool
  • ➔ Cork
  • ➔ Cellulose
• Q29: Define Waterproofing.
  Ans: Waterproofing is the process of making a surface or structure resistant to water.
• Q30: Name some Waterproofing materials.
  Ans: Some waterproofing materials are as follows:

  • ➔ Bitumen
  • ➔ Waterproof membranes
  • ➔ Sealants
  • ➔ Liquid waterproofing coatings