You are currently viewing Important Facts: Quiz on Insulation Materials II 7 MCQs with Explanations

Important Facts: Quiz on Insulation Materials II 7 MCQs with Explanations

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Insulation Materials Quiz

1. What is the temperature range of Thermocol (Expanded Polystyrene) as an organic insulation material?





2. What is the density range of Poly Urethane Foam (PUF) as an organic insulation material?





3. Which organic insulation material is susceptible to degradation from moisture and ultraviolet radiation?





4. What is the temperature range of Expanded nitrile rubber as an organic insulation material?





5. What is the density range of Rock mineral wool as an organic insulation material?





6. What is the thermal conductivity of Calcium Silicate at 200°C?





7. What is the primary factor to consider when choosing insulation material for those concerned about sustainability?





Short Article on Insulation Materials

Insulation Materials

Organic insulation

Organic insulation materials are derived from hydrocarbon polymers and are typically lightweight, flexible, and easy to install. They offer good thermal insulation properties and are generally less expensive than inorganic insulation materials. However, organic insulation materials are also more flammable and can be susceptible to degradation from moisture and ultraviolet radiation.

  • Thermocol (Expanded Polystyrene):
    • Temperature range: -40°C to +80°C
    • Thermal conductivity: 0.029 W/m·K
    • Density: 15-30 kg/m³
    • Applications: Cold insulation for piping and cold storage construction, packaging
  • Poly Urethane Form (PUF):
    • Temperature range: -40°C to +120°C
    • Thermal conductivity: 0.020 W/m·K
    • Density: 30-60 kg/m³
    • Applications: Thermal insulation for walls, roofs, and appliances, spray foam insulation

Inorganic insulation

Inorganic insulation materials are derived from mineral or synthetic fibers and are typically more durable and fire-resistant than organic insulation materials. They offer good thermal insulation properties and are less susceptible to degradation from moisture and ultraviolet radiation. However, inorganic insulation materials are also generally more expensive and heavier than organic insulation materials.

  • Calcium Silicate:
    • Temperature range: 40°C to 950°C
    • Thermal conductivity: 0.07 W/m·K (at 200°C)
    • Density: 260 kg/m³
    • Applications: Industrial process plant piping where high service temperature and compressive strength are needed
  • Mineral wool:
    • Temperature range: -10°C to 500°C
    • Thermal conductivity: 0.039 W/m·K
    • Density: 48-144 kg/m³
    • Applications: Thermal and acoustic insulation for heating and chilling system pipelines, fireproofing
  • Expanded nitrile rubber:
    • Temperature range: -40°C to +80°C
    • Thermal conductivity: 0.035 W/m·K
    • Density: 150-250 kg/m³
    • Applications: Ducting insulation for air conditioning, condensation control in refrigeration pipework
  • Rock mineral wool:
    • Temperature range: -40°C to 800°C
    • Thermal conductivity: 0.039 W/m·K
    • Density: 64-128 kg/m³
    • Applications: Thermal insulation for walls, roofs, and industrial applications, fireproofing

Other factors to consider when choosing insulation material:

  • The R-value of the insulation material, which is a measure of its thermal resistance. The higher the R-value, the better the insulation.
  • The fire resistance of the insulation material, which is important for applications where fire safety is a concern.
  • The moisture resistance of the insulation material, which is important for applications where moisture is a concern.
  • The environmental impact of the insulation material, which is important for those who are concerned about sustainability.

Thermal Conductivities (Hot Insulation):

Mean Temperature (°C)Calcium SilicateResin Bonded Mineral WoolCeramic Fiber Blankets
100–0.04–
2000.070.060.06
3000.080.080.07
4000.080.110.09
700––0.17
1000––0.26

Specific Thermal Conductivity of Materials (Cold Insulation):

MaterialsThermal Conductivity (W/m-°C)
Mineral or Glass Fiber Blanket Board0.039
Cellular Glass0.058
Cork Board0.043
Glass Fiber0.036
Expanded Polystyrene (Smooth)0.029
Expanded Polystyrene (Cut Cell)0.036
Expanded Polyurethane0.017
Phenotherm (Trade Name)0.018
Loose Fill
– Paper or Wood Pulp0.039
– Sawdust or Shavings0.065
Minerals Wool (Rock, Glass, Slag)0.039
Wood Fiber (Soft)0.043

Additional Information:

  • Specific heat (kJ/kg/°C) at different temperatures.
  • Service temperature and density for each material.

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