Ontario Refrigeration Operator Class B Exam
(TSSA) Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A
| Instant Download Pdf
Question 1
What is the minimum required operating experience in a Class A or B refrigeration plant
to challenge the TSSA Refrigeration Operator Class B exam?
A) 720 hours
B) 1,440 hours
C) 2,160 hours
D) 3,000 hours
Answer: B
Rationale: TSSA guidelines require 1,440 hours of practical training in a Class A or B
refrigeration plant to qualify for the Class B certification exam . The requirement is
reduced to 1,280 hours for candidates who have completed a full-time TSSA-approved
time-reduction program .
Question 2
Which code governs the mechanical safety requirements for the design, construction,
installation, and inspection of refrigeration systems in Ontario?
A) CSA B51
B) CSA B52
C) ASHRAE 15
D) CSA B149.3
Answer: B
,Rationale: CSA B52: Mechanical Refrigeration Code sets the standards for safety in
refrigeration systems . CSA B51 covers boilers and pressure vessels . The latest edition is
CSA B52-23, published in December 2023 .
Question 3
Which regulation governs Operating Engineers in Ontario?
A) Technical Standards & Safety Act, 2000
B) Operating Engineers Regulation (Ontario Regulation 219/01)
C) Boilers and Pressure Vessels Regulation
D) CSA B52
Answer: B
Rationale: The Operating Engineers Regulation (Ontario Regulation 219/01) specifies
the certification requirements, plant ratings, and practical experience requirements for
Operating Engineers and Operators in Ontario .
Question 4
Which standard covers the selection, care, and use of respirators?
A) CSA B52
B) CSA Z94.4
C) CSA B51
D) CEPA E2
Answer: B
Rationale: CSA Z94.4 provides standards for the selection, care, and use of respirators,
which is essential for personnel working with hazardous refrigerants like ammonia .
Question 5
What is the minimum passing mark for the TSSA Refrigeration Operator Class B
examination?
,A) 55%
B) 60%
C) 65%
D) 70%
Answer: C
Rationale: The minimum passing mark for the Class B examination is 65%. Rewrites are
allowed after 60 days .
Question 6
How long is the TSSA Refrigeration Operator Class B examination?
A) 2 hours
B) 2.5 hours
C) 3 hours
D) 3.5 hours
Answer: D
Rationale: The examination is 3.5 hours in duration and consists of 150 multiple-choice
questions . Paper RB consists of 150 multiple-choice questions .
Question 7
Which environmental regulation applies to refrigeration plants regarding emergency
preparedness?
A) CSA B52
B) CEPA E2 Environmental Emergency Regulations
C) CSA Z94.4
D) Technical Standards & Safety Act
Answer: B
Rationale: CEPA E2 Environmental Emergency Regulations require facilities with certain
quantities of hazardous substances to have emergency response plans .
, Question 8
Which of the following is NOT part of the Acts, Regulations and Codes domain for the
Class B exam?
A) Technical Standards & Safety Act, 2000
B) Operating Engineers Regulation
C) CSA B52: Mechanical Refrigeration Code
D) ASHRAE Standard 90.1
Answer: D
Rationale: ASHRAE Standard 90.1 (Energy Standard for Buildings) is not listed in the
Class B syllabus. The codes listed include the Technical Standards & Safety Act,
Operating Engineers Regulation, CSA B52, CSA B51, CSA Z94.4, and CEPA E2 .
Question 9
To write the TSSA Refrigeration Operator Class B exam, candidates must obtain their
certificate of qualification within how many years of passing the required examinations?
A) 2 years
B) 3 years
C) 5 years
D) 10 years
Answer: C
Rationale: Candidates who have passed the required examinations must obtain their
certificate of qualification within five (5) years of such passing or re-writing of the
examination will be required .
Question 10
What is the practical operating time requirement for candidates having successfully
completed a full-time TSSA "approved-for-time-reduction" Refrigeration Operator "B"
program?
A) 2 months
B) 3 months
(TSSA) Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A
| Instant Download Pdf
Question 1
What is the minimum required operating experience in a Class A or B refrigeration plant
to challenge the TSSA Refrigeration Operator Class B exam?
A) 720 hours
B) 1,440 hours
C) 2,160 hours
D) 3,000 hours
Answer: B
Rationale: TSSA guidelines require 1,440 hours of practical training in a Class A or B
refrigeration plant to qualify for the Class B certification exam . The requirement is
reduced to 1,280 hours for candidates who have completed a full-time TSSA-approved
time-reduction program .
Question 2
Which code governs the mechanical safety requirements for the design, construction,
installation, and inspection of refrigeration systems in Ontario?
A) CSA B51
B) CSA B52
C) ASHRAE 15
D) CSA B149.3
Answer: B
,Rationale: CSA B52: Mechanical Refrigeration Code sets the standards for safety in
refrigeration systems . CSA B51 covers boilers and pressure vessels . The latest edition is
CSA B52-23, published in December 2023 .
Question 3
Which regulation governs Operating Engineers in Ontario?
A) Technical Standards & Safety Act, 2000
B) Operating Engineers Regulation (Ontario Regulation 219/01)
C) Boilers and Pressure Vessels Regulation
D) CSA B52
Answer: B
Rationale: The Operating Engineers Regulation (Ontario Regulation 219/01) specifies
the certification requirements, plant ratings, and practical experience requirements for
Operating Engineers and Operators in Ontario .
Question 4
Which standard covers the selection, care, and use of respirators?
A) CSA B52
B) CSA Z94.4
C) CSA B51
D) CEPA E2
Answer: B
Rationale: CSA Z94.4 provides standards for the selection, care, and use of respirators,
which is essential for personnel working with hazardous refrigerants like ammonia .
Question 5
What is the minimum passing mark for the TSSA Refrigeration Operator Class B
examination?
,A) 55%
B) 60%
C) 65%
D) 70%
Answer: C
Rationale: The minimum passing mark for the Class B examination is 65%. Rewrites are
allowed after 60 days .
Question 6
How long is the TSSA Refrigeration Operator Class B examination?
A) 2 hours
B) 2.5 hours
C) 3 hours
D) 3.5 hours
Answer: D
Rationale: The examination is 3.5 hours in duration and consists of 150 multiple-choice
questions . Paper RB consists of 150 multiple-choice questions .
Question 7
Which environmental regulation applies to refrigeration plants regarding emergency
preparedness?
A) CSA B52
B) CEPA E2 Environmental Emergency Regulations
C) CSA Z94.4
D) Technical Standards & Safety Act
Answer: B
Rationale: CEPA E2 Environmental Emergency Regulations require facilities with certain
quantities of hazardous substances to have emergency response plans .
, Question 8
Which of the following is NOT part of the Acts, Regulations and Codes domain for the
Class B exam?
A) Technical Standards & Safety Act, 2000
B) Operating Engineers Regulation
C) CSA B52: Mechanical Refrigeration Code
D) ASHRAE Standard 90.1
Answer: D
Rationale: ASHRAE Standard 90.1 (Energy Standard for Buildings) is not listed in the
Class B syllabus. The codes listed include the Technical Standards & Safety Act,
Operating Engineers Regulation, CSA B52, CSA B51, CSA Z94.4, and CEPA E2 .
Question 9
To write the TSSA Refrigeration Operator Class B exam, candidates must obtain their
certificate of qualification within how many years of passing the required examinations?
A) 2 years
B) 3 years
C) 5 years
D) 10 years
Answer: C
Rationale: Candidates who have passed the required examinations must obtain their
certificate of qualification within five (5) years of such passing or re-writing of the
examination will be required .
Question 10
What is the practical operating time requirement for candidates having successfully
completed a full-time TSSA "approved-for-time-reduction" Refrigeration Operator "B"
program?
A) 2 months
B) 3 months
