List of top Agricultural Engineering and Technology Questions on Heat Transfer

Cold air at 10 \(^\circ\text{C}\) is forced to flow over a flat plate maintained at 40 \(^\circ\text{C}\). The mean heat transfer coefficient is 30 \(\text{W}/(\text{m}^2 \cdot ^\circ\text{C})\). What will be the heat flow rate from the plate to the air through a plate area of 2 \(\text{m}^2\)?

Consider the following statement(s) for its correctness.
A. In kinematic chain, the relative motion between the links is completely constrained.
B. A kinematic chain is known as mechanism when all of the links are fixed.
C. The mechanism forms a structure when number of degrees of freedom is zero
D. In kinematic chain, quaternary joint is equivalent to two binary joints
Choose the correct answer from the options given below:

Assertion A: Radiation is the quickest mode of heat transfer.
Reason R: Electromagnetic waves penetrate into the object.
In light of the above statements, choose the correct answer from the options given below:

Assertion A: Radiation is the quickest mode of heat transfer.
Reason R: Electromagnetic waves penetrate into the object.
In light of the above statements, choose the correct answer from the options given below:

On a cold morning, a metal surface on touching is felt colder than a wooden surface because the metal has

Cold air at 10°C is forced to flow over a plate maintained at 40°C. The mean heat transfer coefficient is (\(h_m\)= 30 W/m²·°C). The heat flow rate from plate to air through a plate area of A=2 m² will be