Question 102Refrigeration & AC - 1st Asst/Chief

70% to pass

As shown in the illustrated flow diagram for a self-contained recovery unit designed for the recovery of refrigerants from high pressure appliances as defined by the EPA Clean Air Act rules, what is the functional purpose of the item labeled "FS2"? Illustration GS-RA-32

Refrigeration Chief Question 102 diagram
AIt automatically shuts down the recovery unit compressor when the recovery cylinder becomes 80% full.
BIt automatically shuts down the recovery unit compressor when the discharge pressure becomes excessive.
CIt automatically shuts down the recovery unit compressor when the refrigeration system has reached a depth of 15" Hg.
DIt automatically transitions the recovery unit from the direct liquid recovery mode to the direct vapor recovery mode.
AI Explanation

The correct answer is D) It automatically transitions the recovery unit from the direct liquid recovery mode to the direct vapor recovery mode. The functional purpose of the item labeled "FS2" in the illustrated flow diagram is to automatically switch the recovery unit from liquid recovery mode to vapor recovery mode. This is necessary to ensure the safe and efficient recovery of refrigerants from high pressure appliances, as per the EPA Clean Air Act rules. The other options are incorrect because they do not accurately describe the purpose of FS2. Option A is incorrect as FS2 does not shut down the compressor when the recovery cylinder is 80% full. Option B is incorrect as FS2 does not shut down the compressor due to excessive discharge pressure. Option C is incorrect as FS2 does not shut down the compressor based on the depth of vacuum in the refrigeration system.

Related Questions
Q@q.QuestionNumber:For safe storage, the maximum allowable temperature to which refrigerant bottles... Q@q.QuestionNumber:If a condenser coil of an air-cooled container refrigeration system becomes dirt... Q@q.QuestionNumber:In addition to the drive belt itself, a V-belt that is tensioned too tight will ... Q@q.QuestionNumber:During the initial cooling down of a box temperature in a refrigeration system, ... Q@q.QuestionNumber:Which of the statements listed is applicable to the thermostatic expansion valve...

Ready to test your knowledge?

Take a Refrigeration & AC - 1st Asst/Chief Practice Exam
Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
← Previous All Questions Next →

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App