Sweated copper pipe tees are insulated _____.
a. using mastic to secure the insulation to the pipe
b. using only pre-fabricated covers
c. by saddle-cutting the main line insulation
d. after the branch of the tee is insulated
c. by saddle-cutting the main line insulation
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Online/video merchandising has become an extremely popular way to sell livestock
Indicate whether the statement is true or false.
Liquid refrigerant should always be recovered first from chillers:
A) To ensure the best mixing of refrigerant and water during recovery. B) To ensure that all the oil is removed from the compressor. C) To keep from freezing the water in the chiller tubes. D) To prevent the removal of refrigerant oil with the refrigerant.
An air contaminant that cannot be filtered out through normal mechanical filtration is
A) sawdust B) pollen C) virus D) mold spores
The ____________________ type of transmission signal is used in applications where a spark may cause an explosion.
Fill in the blank(s) with the appropriate word(s).