A. glass
B. water
C. plastic
D. rubber
E. air

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Related Mcqs:

  1. Which of the following has maximum value of thermal conductivity________________?
    A. aluminium B. steel C. brass D. copper E. lead...
  2. The value of Prandtl number for air is about _______________________?
    A. 0.1 B. 0.3 C. 0.7 D. 1.7 E. 10.5...
  3. The value of the wavelength for maximum emissive power is given by ___________________?
    A. Wien’s law B. Planck’s law C. Stefan’s law D. Fourier’s law E. Kirchhoff’s law...
  4. Which of the following is the case of heat transfer by radiation ___________________?
    A. blast furnace B. heating of building C. cooling of parts in furnace D. heat received by a person from fireplace E. all of the above...
  5. Which of the following is a case of steady state heat transfer ___________________?
    A. I.C. engine B. air preheaters C. heating of building in winter D. all of the above E. none of the above...
  6. Which of the following is expected to have highest thermal conductivity_______________?
    A. steam B. solid ice C. melting ice D. water E. boiling water...
  7. Which of the following property of air does not increase with rise in temperature ________________?
    A. thermal conductivity B. thermal diffusivity C. density D. dynamic viscosity E. kuiematic viscosity...
  8. When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by ___________________?
    A. conduction B. convection C. radiation D. conduction and convection E. convection and radiation...
  9. Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in _________________?
    A. electric heater B. steam condenser C. melting of ice D. refrigerator condenser coils E. boiler...
  10. In free con-vection heat transfer, Nusselt number is function of________________?
    A. Grashoff no. and Reynold no B. Grashoff no and Prandtl no. C. Prandtl no. and Reynold no D. Grashoff no., Prandtl no and Reynold no E. none of the above...
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