A. glass
B. water
C. plastic
D. rubber
E. air
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Related Mcqs:
- Which of the following has maximum value of thermal conductivity________________?
- A. aluminium B. steel C. brass D. copper E. lead...
- The value of Prandtl number for air is about _______________________?
- A. 0.1 B. 0.3 C. 0.7 D. 1.7 E. 10.5...
- 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...
- 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...
- 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...
- Which of the following is expected to have highest thermal conductivity_______________?
- A. steam B. solid ice C. melting ice D. water E. boiling water...
- 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...
- 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...
- 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...
- 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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