Missouri Mechanical Systems Auditor
Exam Questions And Answers With
Verified Rationales | 2026/27 Qs & Ans
Digital Pdf Download
1. Which Missouri statute provides the legal authority for the regulation of
mechanical systems, including licensing of mechanical contractors?
a) RSMo Chapter 198
b) RSMo Chapter 334
c) RSMo Chapter 292
d) RSMo Chapter 197
Rationale: RSMo Chapter 334 covers the licensing of mechanical contractors,
plumbers, electricians, and other trades through the Division of Professional
Registration .
2. According to RSMo 334.020, who is required to be licensed as a
mechanical contractor in Missouri?
a) Anyone who changes a light bulb
b) Any person who contracts to install, repair, or maintain mechanical
systems (HVAC, refrigeration, etc.) for compensation
c) Only engineers
d) Only architects
Rationale: The statute requires licensing for those who perform mechanical
,work for compensation, with certain exceptions for owner-occupied single-
family residences .
3. Under Missouri law, what is the experience requirement for a mechanical
contractor license?
a) No experience required
b) At least 4 years of practical experience in the mechanical trade
c) 2 years of experience
d) 8 years of experience
Rationale: RSMo 334.060 requires applicants to have at least four years of
practical experience .
4. Which of the following is an approved examination for Missouri
mechanical contractor licensing?
a) NFPA exam
b) ICC Mechanical Contractor exam or PSI Mechanical Contractor exam
c) LEED exam
d) ASHRAE exam
Rationale: Missouri accepts nationally recognized examinations from ICC
and PSI for mechanical contractor licensing .
5. According to RSMo 334.100, how many hours of continuing education are
required for mechanical contractor license renewal biennially?
a) 10 hours
b) 12 hours
,c) 16 hours
d) 20 hours
Rationale: Licensees must complete 12 hours of approved continuing
education each biennial renewal period .
6. Under Missouri's mechanical code adoption, which version of the
International Mechanical Code (IMC) is currently in effect (as of 2024-2025)?
a) 2015 IMC
b) 2018 IMC
c) 2021 IMC
d) 2024 IMC
*Rationale: Missouri adopted the 2018 IMC with state-specific amendments
.*
7. Which state agency is responsible for promulgating rules related to
mechanical system safety in public buildings?
a) Missouri Department of Labor
b) Missouri Division of Fire Safety
c) Missouri Department of Natural Resources
d) Missouri Department of Health
Rationale: The Division of Fire Safety within the Department of Public Safety
oversees mechanical system safety in public buildings .
8. Under the Missouri Energy Code (adopted from IECC), what is the
minimum SEER rating for new residential air conditioning systems in
, Missouri?
a) SEER 13
b) SEER 14
c) SEER 16
d) SEER 18
Rationale: Missouri adopted the 2018 IECC which requires SEER 14 minimum
for residential AC (northern climate zone) .
9. According to Missouri's mechanical code, what is the required combustion
air opening size for a confined space containing gas-fired equipment?
a) 1 square inch per 1,000 BTU
b) 1 square inch per 1,000 BTU (direct openings) or per 3,000 BTU (horizontal
duct openings)
c) 1 square inch per 500 BTU
d) 1 square inch per 5,000 BTU
Rationale: The IMC requires combustion air calculations based on equipment
input ratings .
10. Under Missouri's mechanical code, what is the minimum vertical
clearance required above a residential gas-fired water heater?
a) 6 inches
b) 12 inches
c) 18 inches
d) 24 inches
Exam Questions And Answers With
Verified Rationales | 2026/27 Qs & Ans
Digital Pdf Download
1. Which Missouri statute provides the legal authority for the regulation of
mechanical systems, including licensing of mechanical contractors?
a) RSMo Chapter 198
b) RSMo Chapter 334
c) RSMo Chapter 292
d) RSMo Chapter 197
Rationale: RSMo Chapter 334 covers the licensing of mechanical contractors,
plumbers, electricians, and other trades through the Division of Professional
Registration .
2. According to RSMo 334.020, who is required to be licensed as a
mechanical contractor in Missouri?
a) Anyone who changes a light bulb
b) Any person who contracts to install, repair, or maintain mechanical
systems (HVAC, refrigeration, etc.) for compensation
c) Only engineers
d) Only architects
Rationale: The statute requires licensing for those who perform mechanical
,work for compensation, with certain exceptions for owner-occupied single-
family residences .
3. Under Missouri law, what is the experience requirement for a mechanical
contractor license?
a) No experience required
b) At least 4 years of practical experience in the mechanical trade
c) 2 years of experience
d) 8 years of experience
Rationale: RSMo 334.060 requires applicants to have at least four years of
practical experience .
4. Which of the following is an approved examination for Missouri
mechanical contractor licensing?
a) NFPA exam
b) ICC Mechanical Contractor exam or PSI Mechanical Contractor exam
c) LEED exam
d) ASHRAE exam
Rationale: Missouri accepts nationally recognized examinations from ICC
and PSI for mechanical contractor licensing .
5. According to RSMo 334.100, how many hours of continuing education are
required for mechanical contractor license renewal biennially?
a) 10 hours
b) 12 hours
,c) 16 hours
d) 20 hours
Rationale: Licensees must complete 12 hours of approved continuing
education each biennial renewal period .
6. Under Missouri's mechanical code adoption, which version of the
International Mechanical Code (IMC) is currently in effect (as of 2024-2025)?
a) 2015 IMC
b) 2018 IMC
c) 2021 IMC
d) 2024 IMC
*Rationale: Missouri adopted the 2018 IMC with state-specific amendments
.*
7. Which state agency is responsible for promulgating rules related to
mechanical system safety in public buildings?
a) Missouri Department of Labor
b) Missouri Division of Fire Safety
c) Missouri Department of Natural Resources
d) Missouri Department of Health
Rationale: The Division of Fire Safety within the Department of Public Safety
oversees mechanical system safety in public buildings .
8. Under the Missouri Energy Code (adopted from IECC), what is the
minimum SEER rating for new residential air conditioning systems in
, Missouri?
a) SEER 13
b) SEER 14
c) SEER 16
d) SEER 18
Rationale: Missouri adopted the 2018 IECC which requires SEER 14 minimum
for residential AC (northern climate zone) .
9. According to Missouri's mechanical code, what is the required combustion
air opening size for a confined space containing gas-fired equipment?
a) 1 square inch per 1,000 BTU
b) 1 square inch per 1,000 BTU (direct openings) or per 3,000 BTU (horizontal
duct openings)
c) 1 square inch per 500 BTU
d) 1 square inch per 5,000 BTU
Rationale: The IMC requires combustion air calculations based on equipment
input ratings .
10. Under Missouri's mechanical code, what is the minimum vertical
clearance required above a residential gas-fired water heater?
a) 6 inches
b) 12 inches
c) 18 inches
d) 24 inches
