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1 why do commercial refrigeration systems need a defrost system2 list the ways an evaporator can be defrosted3 what are
1 explain a method used to determine the correct operating discharge pressure of a commercial refrigeration system2
1 explain how to test whether a potential relay is defective using an ohmmeter2 explain how to test whether a capacitor
1 at what cylinder temperature will oil break down inside a compressor2 what should a technician do after changing out
1 what are the three major electrical defects that can cause a compressor not to operate2 what is the maximum voltage
1 which tool measures how much current a load is drawing2 explain the groups into which compressor problems can be
1 what could cause ice to build up in the ice bin2 list two things that might lead to a decrease in ice production3 why
1 what is the purpose of the auger seal on a flake ice machine2 list three safety devices used for flake ice machines3
1 how is crushed ice made why is flake ice ideally suited for any contact presentation such as displaying fish at the
1 list eight applications for commercial ice machines2 how much ice will a 12-oz drinking cup approximately hold3 about
1 how do open display cases maintain the temperature within the case without any doors2 the temperature is monitored in
1 do enclosed display cases use more or less energy than open cases2 how does a series heat-reclaim system operate3
1 how is a distributed system arranged in a supermarket2 what is the advantage to variable-frequency drive motors3
1 explain how an adaptive defrost cycle operates2 what is the advantage of a case coil secondary-loop system3 what
1 what type of pressure control can be used for rooftop aircooled condensers2 how does a pulse-width modulated
1 what is the most common type of system used in traditional supermarkets2 how many compressors are typically found on
1 when locating an air-cooled condenser outdoors why must the system be modified2 list at least three requirements when
1 what are the four separate loads used to calculate the heat load for walk-in coolers or freezers2 what is the first
1 outline a method of isolating an electrical fault using the process of elimination2 describe the process of
1 list some common questions customers ask service technicians2 explain what is meant by a systems approach to
1 why is it safer to cut out refrigeration components for removal rather than debraze them2 why are suction-line
1 why should a cleanup filter drier always be used after performing a system flush2 which refrigeration system
1 list the system characteristics that are checked when taking system baseline performance2 list the stages of system
1 what are the most common sources of refrigeration system contamination2 explain how contaminants from a previous
1 what are the most common types of refrigeration system contaminants introduced because of improper installation2 how