RETA CARO Test 1: 2026 update | comprehensive questions and verified answers (complete solutions) A+ GRADE!!

RETA CARO Test 1: 2026 update | comprehensive questions and
verified answers (complete solutions) A+ GRADE!!



What are the replacement blended refrigerants called ?


ANSWERS: An azeotrope or zeotrope


What is one positive characteristic of halocarbon refrigerants ?


ANSWERS: They are usually not flammable


What is the primary reason for concern about HCFC- 22 concentration in an
engine room
?


ANSWERS: Oxygen deprivation

O psig is equal to


ANSWERS: 14.7 psia


Discharge vapor from all compressors


ANSWERS: will contain some level of superheat


Which category of compressor " traps " a volume of refrigerant vapor prior to
compression ?


ANSWERS: Positive displacement

, When suction pressure rises , the operator should


ANSWERS: start another compressor


The crankcase oil heater should be ON


ANSWERS: when the compressor is off .


Slugging is caused by


ANSWERS: oil or liquid refrigerant


What should be done if liquid refrigerant appears while draining oil ?


ANSWERS: Do what the SOP states


Proper oil management for a refrigeration system requires that


ANSWERS: a log should record all oil added to and removed from a system


When heat is added to saturated liquid refrigerant it will always


ANSWERS: evaporate


What effect does the addition of fins to evaporator coils have ?


ANSWERS: It increases the efficiency of a unit by increasing the surface area


During hot gas defrost


ANSWERS: high pressure gas flows through and condenses in the evaporator