Thermal Conductivity of Materials MCQ

Test your knowledge with important Thermal Conductivity of Materials MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Thermal Conductivity of Materials MCQs at Bissoy

• Choose the false statement
  ক

  For pure metal thermal conductivity is more

  খ

  Thermal conductivity decreases with increase in the density of the substance

  গ

  Thermal conductivity of dry material is lower than that of damp material

  ঘ

  Heat treatment causes variation in thermal conductivity
• Cork is a good insulator because
  ক

  It is flexible

  খ

  It can be powdered

  গ

  Low density

  ঘ

  It is porous
• The heat energy propagation due to conduction heat transfer will be minimum for
  ক

  Lead

  খ

  Water

  গ

  Air

  ঘ

  Copper
• Heat conduction in gases is due to
  ক

  Elastic impact of molecules

  খ

  Movement of electrons

  গ

  EM Waves

  ঘ

  Mixing of gases
• Most metals are good conductor of heat because of
  ক

  Transport of energy

  খ

  Free electrons and frequent collision of atoms

  গ

  Lattice defects

  ঘ

  Capacity to absorb energy
• Identify the very good insulator
  ক

  Saw dust

  খ

  Cork

  গ

  Asbestos sheet

  ঘ

  Glass wool
• The average thermal conductivities of water and air conform to the ratio
  ক

  50:1

  খ

  25:1

  গ

  5:1

  ঘ

  15:1
• Which one of the following forms of water have the highest value of thermal conductivity?
  ক

  Boiling water

  খ

  Steam

  গ

  Solid ice

  ঘ

  Melting ice
• Mark the matter with least value of thermal conductivity
  ক

  Air

  খ

  Water

  গ

  Ash

  ঘ

  Window glass
• Thermal conductivity is defined as the heat flow per unit time
  ক

  When the temperature gradient is unity

  খ

  Across the wall with no temperature

  গ

  Through a unit thickness of the wall

  ঘ

  Across unit area where the temperature gradient is unity