MASSACHUSETTS REFRIGERATION License
Exam Questions and Answers Latest Version
Top Rated A+
Question >> 1: What is the standard method for detecting refrigerant leaks?
A. Visual inspection only
B. Electronic leak detector or bubble solution
C. Smell test
D. Pressure gauge only
,CORRECT ANSWER>> B. Electronic leak detector or bubble solution
Rationale: EPA-approved leak detection methods include electronic detectors,
ultrasonic detectors, or bubble solutions applied to suspected leak points.
Question >> 2: Which Massachusetts license requires passing both written
and practical exams?
A. Apprentice
B. Journeyman
C. Master
D. Both B and C
CORRECT ANSWER>> D. Both B and C
Rationale: Both Journeyman and Master Refrigeration licenses in Massachusetts
require passing written knowledge exams; Master may also require practical
demonstration.
Question >> 3: What is the maximum allowable leak rate for commercial
refrigeration systems containing over 50 pounds of refrigerant under EPA
regulations?
A. 10% per year
B. 20% per year
C. 30% per year
D. 40% per year
CORRECT ANSWER>> B. 20% per year
Rationale: EPA Section 608 mandates that commercial refrigeration systems with >50
lbs refrigerant must be repaired if the leak rate exceeds 20% of the charge per year.
Question >> 4: Which Massachusetts authority issues refrigeration licenses?
A. Department of Public Safety
B. Board of State Examiners of Plumbers and Gas Fitters
C. Department of Environmental Protection
D. Division of Professional Licensure
CORRECT ANSWER>> B. Board of State Examiners of Plumbers and Gas
Fitters
Rationale: Massachusetts 248 CMR places refrigeration licensing under the Board of
State Examiners of Plumbers and Gas Fitters, which administers exams and issues
licenses.
Question >> 5: What is the primary purpose of a receiver in a refrigeration
system?
, A. To compress refrigerant vapor
B. To store liquid refrigerant
C. To evaporate refrigerant
D. To measure pressure
CORRECT ANSWER>> B. To store liquid refrigerant
Rationale: The receiver stores condensed liquid refrigerant after the condenser,
ensuring a steady supply to the metering device during varying load conditions.
Question >> 6: Which refrigerant is classified as an HFC (Hydrofluorocarbon)?
A. R-22
B. R-134a
C. R-717
D. R-12
CORRECT ANSWER>> B. R-134a
Rationale: R-134a is an HFC refrigerant with zero ozone depletion potential (ODP). R-
22 and R-12 are HCFCs/CFCs; R-717 is ammonia (natural refrigerant).
Question >> 7: What safety device shuts off a compressor when discharge
pressure exceeds safe limits?
A. Low-pressure control
B. High-pressure control
C. Oil failure control
D. Thermostat
Exam Questions and Answers Latest Version
Top Rated A+
Question >> 1: What is the standard method for detecting refrigerant leaks?
A. Visual inspection only
B. Electronic leak detector or bubble solution
C. Smell test
D. Pressure gauge only
,CORRECT ANSWER>> B. Electronic leak detector or bubble solution
Rationale: EPA-approved leak detection methods include electronic detectors,
ultrasonic detectors, or bubble solutions applied to suspected leak points.
Question >> 2: Which Massachusetts license requires passing both written
and practical exams?
A. Apprentice
B. Journeyman
C. Master
D. Both B and C
CORRECT ANSWER>> D. Both B and C
Rationale: Both Journeyman and Master Refrigeration licenses in Massachusetts
require passing written knowledge exams; Master may also require practical
demonstration.
Question >> 3: What is the maximum allowable leak rate for commercial
refrigeration systems containing over 50 pounds of refrigerant under EPA
regulations?
A. 10% per year
B. 20% per year
C. 30% per year
D. 40% per year
CORRECT ANSWER>> B. 20% per year
Rationale: EPA Section 608 mandates that commercial refrigeration systems with >50
lbs refrigerant must be repaired if the leak rate exceeds 20% of the charge per year.
Question >> 4: Which Massachusetts authority issues refrigeration licenses?
A. Department of Public Safety
B. Board of State Examiners of Plumbers and Gas Fitters
C. Department of Environmental Protection
D. Division of Professional Licensure
CORRECT ANSWER>> B. Board of State Examiners of Plumbers and Gas
Fitters
Rationale: Massachusetts 248 CMR places refrigeration licensing under the Board of
State Examiners of Plumbers and Gas Fitters, which administers exams and issues
licenses.
Question >> 5: What is the primary purpose of a receiver in a refrigeration
system?
, A. To compress refrigerant vapor
B. To store liquid refrigerant
C. To evaporate refrigerant
D. To measure pressure
CORRECT ANSWER>> B. To store liquid refrigerant
Rationale: The receiver stores condensed liquid refrigerant after the condenser,
ensuring a steady supply to the metering device during varying load conditions.
Question >> 6: Which refrigerant is classified as an HFC (Hydrofluorocarbon)?
A. R-22
B. R-134a
C. R-717
D. R-12
CORRECT ANSWER>> B. R-134a
Rationale: R-134a is an HFC refrigerant with zero ozone depletion potential (ODP). R-
22 and R-12 are HCFCs/CFCs; R-717 is ammonia (natural refrigerant).
Question >> 7: What safety device shuts off a compressor when discharge
pressure exceeds safe limits?
A. Low-pressure control
B. High-pressure control
C. Oil failure control
D. Thermostat
