When prescribing a boundary condition for mass transfer at a solid–gas interface, why do we need to specify the side of the surface (whether the solid or the gas side)? Why did we not do it in heat transfer?
What will be an ideal response?
When prescribing a boundary condition for mass transfer at a solid-gas interface, we need to specify the side of the surface (whether the solid or the gas side). This is because concentration, in general, is not a continuous function, and there may be large differences in concentrations on the gas and solid sides of the boundary. We did not do this in heat transfer because temperature is a continuous function.
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Fill in the blank(s) with correct word
What is the correct way to cut off a hex nut with a hammer and chisel?
What will be an ideal response?
Which of the following is a true statement regarding fabric duct systems?
a. The material cost of a fabric duct system is typically 10 percent more than an equal sheet metal duct system. b. Fabric duct materials require special cleaning processes using low-pressure steam. c. Most fabric duct systems are located outside of the conditioned space. d. Porous versions of duct material stay cleaner since dust cannot easily settle on the duct.
Which of the following should not be done when servicing a condenser?
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