Which of the following statement regarding heat transfer through stationary fluid is correct? select one: a. conduction occurs when temperature gradient exists in stationary fluid ο b. convection occurs when temperature gradient exists in stationary fluid ο c. radiation occurs when temperature gradient exists in stationary fluid d. no heat transfer occurs when temperature gradient exists in stationary fluid

b. Convection occurs when temperature gradient exist in stationary fluid.

Explanation:

Convection : heat transport through fluid movement;  It also occur when there is heat exchange between a solid and a fluid.  

there are two types:

                  Q = h * A * ΔT

∴ h : film coeffcient

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.