The value of Prandtl number for air is about _______________________?

Related Mcqs:

Sensible heat is the heat required to __________________?

A. change vapour into liquid B. change liquid into vapour C. increase the temperature of a liquid of vapour D. convert water into steam and superheat it E. convert saturated steam into dry steam...

Thermal conductivity of a material may be defined as the________________?

A. quantity of heat flowing in one second through one cm cube of material when opposite faces ^re maintained at a temperature difference of 1°C B. quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C … Thermal conductivity of a material may be defined as the________________?Read More...

The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as ________________?

A. emissivity B. transmissivity C. reflectivity D. intensity of radiation E. absorptivity...

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...

The emissive power of a body depends upon its___________________?

A. temperature B. wave length C. physical nature D. all of the above E. none of the above...