Home

What is the correct answer?

4

The insulation ability of an insulator with the presence of moisture would

A. Increase

B. Decrease

C. Remain unaffected

D. May increase/decrease depending on temperature and thickness of insulation

Correct Answer :

B. Decrease


Related Questions

According to Stefan's law, the total radiation from a black body per second… Thermal conductivity of water ________ with rise in temperature. In case of liquids and gases, the heat transfer takes place according… The ratio of surface convection resistance to the internal conduction… A cube at high temperature is immersed in a constant temperature bath.… Thermal conductivity of air at room temperature in kcal/m hr °C is… The value of Prandtl number for air is about The process of heat transfer from one particle of the fluid to another… Heat transfer by radiation mainly depends upon A heat exchanger with heat transfer surface area A and overall heat transfer… The unit of overall coefficient of heat transfer is In free convection heat transfer, Nusselt number is function of The expression Q = ρ AT4 is called In a heat exchanger with one fluid evaporating or condensing, the surface… The amount of radiation mainly depends upon the Metals are good conductors of heat because The concept of overall coefficient of heat transfer is used in case of… When α is absorptivity, ρ is reflectivity and τ is transmissivity,… The unit of Stefan Boltzmann constant is The time constant of a thermocouple is The amount of radiation mainly depends on The thermal diffusivities for solids are generally When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity… Unit of thermal diffusivity is The unit of overall coefficient of heat transfer is Depending on the radiating properties, a body will be opaque when The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x.… If the temperature of a solid surface changes from 27°C to 627°C,… The amount of heat flow through a body by conduction is Unit of thermal conductivity in S.I. units is