On a commercial refrigeration system with hot defrost, what does the compressor do during the defrost cycle?
A) It shuts off.
B) It cycles like it normally would.
C) It operates to provide the heat for defrost.
D) It runs backwards to pump hot gas into the evaporator.
C
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____ windows are tested to meet the standards required to provide resistance to forced entry.
A. Security B. Skylight C. Roof D. Storm
____ holes are used for applications with flat head and oval head screws.
A. Countersunk B. Counterbore C. Drill D. Spotface
Evaporator coils found in reach-in freezers are often corroded by _____.
a. repeated defrosts b. sanitizing solution c. the off-gassing of certain foods d. poor condensate removal
____________________ is a high temperature process for metal and ceramics that flows the material together either without melting it or by melting it, but only barely above the melting temperature.
Fill in the blank(s) with the appropriate word(s).