What is the driving force for (a) heat transfer, (b) electric current flow, (c) fluid flow, and (d) mass transfer?
What will be an ideal response?
The concentration of a commodity is defined as the amount of that commodity per unit volume. The concentration gradient dC/dx is defined as the change in the concentration C of a commodity per unit length in the direction of flow x. The diffusion rate of the commodity is expressed as
where A is the area normal to the direction of flow and kdiff is the diffusion coefficient of the medium, which is a measure of how fast a commodity diffuses in the medium.
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For a carbon steel piping and flange system that is 6-inch schedule 40 with class 600 flanges operating at a max of 400°F, what is the MAWP?
a. 1200 b. 1205 c. 1270 d. 2062
The tubing or pipe for natural gas supply to a gas heating unit is ____________________.
Fill in the blank(s) with the appropriate word(s).
What is the effect on evaporator temperature and pressure when the evaporator is dirty or iced up?
a. The temperature and pressure remains the same. b. The temperature and pressure increase. c. The temperature and pressure decrease.
The position of the sensor on the leveling rod is recorded for a comparison of readings taken at different locations.
Answer the following statement true (T) or false (F)