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