An inherent quality of a vapor diffusion retarder is ________
A) It does not allow microscopic water molecules to pass through the wall system
B) It does allow microscopic water molecules to pass through and leave the wall system.
C) It blocks 100% of moisture transfer
D) It speeds up the transfer of bulk moisture
B
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Answer the following statements true (T) or false (F)
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To minimize distortion when cutting thin steel, _____.
a. avoid preheating the metal before starting the cut b. keep the cutting tip perpendicular to the metal's surface c. move as quickly as possible without losing the cut d. preheat the metal until it is near its melting point
A technician notes that an operating air-conditioning system has ice formed on the suction line at the condensing unit. The technician can reasonably assume that:
A) The refrigerant charge is low. B) The evaporator coil also is frozen over. C) The refrigerant charge is high. D) The condenser coil also is frozen over.
_________ equipment means listing measurments as well as the number and kinds of equipment needed for the job.
Fill in the blank(s) with the appropriate word(s).