Define the following terms:
a. Backwashing
b. Baffle
c. BTU
d. Fouling
e. Counterflow
f. Crossflow
g. Laminar flow
h. Parallel flow
i. Turbulent flow
j. Convection
k. Conduction
a. Backwashing is a procedure in which the direction of flow through the exchanger is reversed to remove solids.
b. A baffle is a metal plate that is placed inside a vessel or tank and is used to alter the flow of chemicals, facilitate mixing, or cause turbulent flow.
c. A British thermal unit (BTU) is a measure of energy in the English (Imperial standard) system; it is the heat required to raise the temperature of 1 pound of water 1 degree Fahrenheit at sea level.
d. Fouling is the accumulation of deposits that build up on the surfaces of processing equipment.
e. Counterflow is the flow movement that occurs when two fluids are moving in opposite directions.
f. Crossflow is the movement that occurs when two streams of fluid flow perpendicular (at 90-degree angles) to each other.
g. Parallel flow is the movement of fluid that occurs in a heat exchanger when the shell flow and the tube flow are parallel to one another.
h. Turbulent flow is the movement of fluids that occurs when a Reynolds number (dimensionless number) is above 10,000 at high velocities.
i. Convection is the transfer of heat as a result of fluid movement.
j. Conduction is the transfer of heat from one substance to another by direct contact.
k. Radiation is the transfer of heat through electromagnetic waves (for example, warmth emitted from the sun).
You might also like to view...
Of the following, the only argument NOT put forward by the war hawks as a justification for a declaration of war against Britain was that
A. the British armed Indians and incited them to raid frontier settlements. B. British impressment policies were an affront to American nationalism. C. Britain's commercial restrictions had come close to destroying America's profitable New England shipping business. D. British Canada and Spanish Florida were attractive and easily obtainable prizes of war. E. the orders in council stopped the flow of Western farm products to Europe.
This type of section is commonly used on an object that is consistent in shape throughout its length and where the shapes cannot be clearly shown in a regular multiview, and no cutting plane line is typically used.
a. broken-out section b. auxiliary section c. revolved section d. removed section
______ is used to measure the clearance between the journal and bearing in a plain bearing engine.
A. Plastigage B. Prussian blue C. Litmus paper D. Dykem
Identify the compounding period for the following interest statements: (a) nominal 7% per year, compounded monthly; (b) effective 6.8% per year, compounded monthly; and (c) effective 3.4% per quarter, compounded weekly.
What will be an ideal response?