List of top Agricultural Engineering and Technology Questions on Heat and Mass Transfer

Thermal diffusivity of the material depends upon -
(A). Thermal conductivity
(B). Mass density
(C). Specific heat
(D). Moisture content

Choose the correct answer from the options given below:

Given below are two statements:
Statement (I): The critical radius of insulation is the thickness of insulation at which the rate of heat transfer through the body is minimum.
Statement (II): Rate of heat transfer increases with an increase in the thickness of insulation up to the critical radius of insulation.
In light of the above statements, choose the most appropriate answer from the options given below.

Temperature dependence of a biological reaction is expressed by:

The phase change from solid to vapour without passing through liquid phase occurs:

In a multiple effect evaporator, the feed enters in which direction if the feed and steam flows are in the same direction?

Specific heat of water is:

In a multiple effect evaporator, the feed enters in which direction if the feed and steam flows are in the same direction?

The phase change from solid to vapour without passing through liquid phase occurs:

Temperature dependence of a biological reaction is expressed by:

Specific heat of water is:

The correct relationship between Pecklet number (Pe), Reynold number (Re), Prandtl number (Pr), Rayleigh number (Ra) and Grashoff number (Gr) is

Match List I with List II

List I & List II
A. Conduction & I. Stefan-Boltzmann Law
B. Convection & II. Fick's Law
C. Radiation & III. Newton's law of cooling
D. Mass Transfer & IV. Fourier Law

Choose the correct answer from the options given below:

Given below are two statements
Statement I: Increase in thermal conductivity increases thermal diffusivity
Statement II: Materials having higher specific heat possess lower thermal diffusivity
In light of the above statements, choose the most appropriate answer from the options given below