Michigan Boiler Installer 2B Practice Exam | Complete Study
Guide with Practice Questions, Answers & Rationales | 2026–
2027 Edition
Question 1
Under the Michigan Skilled Trades Regulation Act (PA 407 of 2016), what is the
maximum allowable working pressure (MAWP) for a boiler to be legally classified as a
low-pressure steam boiler?
A. 15 psi
B. 30 psi
C. 50 psi
D. 160 psi
Answer: A
Rationale: ASME Section IV and Michigan Boiler Rules define a low-pressure steam
heating boiler as a boiler operating at pressures not exceeding 15 psi.
Question 2
What is the maximum allowable temperature limit for a low-pressure hot-water heating
boiler permitted under a Classification 2B installer license?
A. 120°F
B. 200°F
C. 250°F
D. 350°F
Answer: C
Rationale: Low-pressure hot-water heating boilers are restricted to a maximum
temperature limit of 250°F. Exceeding this boundary pushes the system into high-
pressure power boiler standards.
Question 3
How many days before beginning the physical installation of any regulated boiler in
Michigan must the installer apply for a permit from LARA?
A. No advance notice is needed if licensed
B. At least 30 days prior
,C. Clear approval and permit issuance must be obtained before installation work begins
D. Within 10 days after completing the work
Answer: C
Rationale: State laws mandate that no person shall install or alter a boiler without first
securing a valid installation permit from LARA's Boiler Division.
Question 4
What is the minimum age required by law to sit for a LARA Skilled Trades Boiler
Installer examination in Michigan?
A. 18 years old
B. 21 years old
C. 24 years old
D. 25 years old
Answer: A
Rationale: Michigan licensing baselines require an applicant to be at least 18 years of
age to legally test for a trade credential.
Question 5
Which ASME Code section governs the construction and stamping requirements for
low-pressure heating boilers?
A. ASME Section I
B. ASME Section IV
C. ASME Section VIII
D. ASME Section IX
Answer: B
Rationale: ASME Section IV sets the industry construction metrics for heating boilers
operating within low-pressure limitations.
Question 6
What code symbol stamp is placed on a low-pressure cast-iron or steel heating boiler
manufactured to ASME Section IV specifications?
A. "S" Stamp
B. "U" Stamp
,C. "H" Stamp
D. "R" Stamp
Answer: C
Rationale: The "H" stamp designates a heating boiler constructed to Section IV
parameters. "S" stands for high-pressure power boilers, and "U" stands for pressure
vessels.
Question 7
Under Michigan Boiler Rules, what is the minimum number of safety valves required on
a low-pressure steam heating boiler?
A. At least one safety valve of sufficient capacity
B. Exactly two valves regardless of size
C. Three separate valves piped in parallel
D. Safety valves are optional on low-pressure systems
Answer: A
Rationale: Every steam boiler must feature at least one ASME-rated and certified safety
valve to relieve excessive pressure blocks.
Question 8
What is the standard pressure setting for a safety relief valve mounted on a residential
low-pressure hot-water heating boiler?
A. 15 psi
B. 30 psi
C. 60 psi
D. 125 psi
Answer: B
Rationale: While steam is limited to 15 psi, standard low-pressure hot-water heating
boilers typically deploy safety relief valves set to open at 30 psi.
Question 9
Which device must be installed on a low-pressure steam boiler to prevent an automatic
burner cycle if the internal water level drops below safe parameters?
A. An automatic water feeder loop only
, B. A low-water fuel cutoff (LWCO) control switch
C. A motorized pressure-reducing valve
D. A secondary expansion tank panel
Answer: B
Rationale: An LWCO shuts down electricity to the burner if water drops below a safe
baseline, avoiding catastrophic structural melting or dry-firing.
Question 10
To prevent a rapid siphon action from emptying a low-pressure steam boiler, what type
of structural piping configuration is mandatory on the return loop line?
A. A horizontal check valve manifold
B. A Hartford Loop configuration
C. A vertical drop separator chamber
D. An open-air barometric vent line
Answer: B
Rationale: The Hartford Loop matches pressures and balances water levels, ensuring a
broken return line cannot completely siphon water out of the heating block.
Question 11
What color flag or marking is used by utility locators to identify buried natural gas lines
before a boiler room excavation or trenching project begins?
A. Red
B. Yellow
C. Blue
D. Green
Answer: B
Rationale: Under the standardized APWA uniform color code, yellow designates gas,
oil, steam, petroleum, or gaseous materials.
Question 12
What is the minimum required horizontal clearance workspace that must be maintained
in front of a low-pressure heating boiler to allow safe burner servicing?
A. 12 inches
Guide with Practice Questions, Answers & Rationales | 2026–
2027 Edition
Question 1
Under the Michigan Skilled Trades Regulation Act (PA 407 of 2016), what is the
maximum allowable working pressure (MAWP) for a boiler to be legally classified as a
low-pressure steam boiler?
A. 15 psi
B. 30 psi
C. 50 psi
D. 160 psi
Answer: A
Rationale: ASME Section IV and Michigan Boiler Rules define a low-pressure steam
heating boiler as a boiler operating at pressures not exceeding 15 psi.
Question 2
What is the maximum allowable temperature limit for a low-pressure hot-water heating
boiler permitted under a Classification 2B installer license?
A. 120°F
B. 200°F
C. 250°F
D. 350°F
Answer: C
Rationale: Low-pressure hot-water heating boilers are restricted to a maximum
temperature limit of 250°F. Exceeding this boundary pushes the system into high-
pressure power boiler standards.
Question 3
How many days before beginning the physical installation of any regulated boiler in
Michigan must the installer apply for a permit from LARA?
A. No advance notice is needed if licensed
B. At least 30 days prior
,C. Clear approval and permit issuance must be obtained before installation work begins
D. Within 10 days after completing the work
Answer: C
Rationale: State laws mandate that no person shall install or alter a boiler without first
securing a valid installation permit from LARA's Boiler Division.
Question 4
What is the minimum age required by law to sit for a LARA Skilled Trades Boiler
Installer examination in Michigan?
A. 18 years old
B. 21 years old
C. 24 years old
D. 25 years old
Answer: A
Rationale: Michigan licensing baselines require an applicant to be at least 18 years of
age to legally test for a trade credential.
Question 5
Which ASME Code section governs the construction and stamping requirements for
low-pressure heating boilers?
A. ASME Section I
B. ASME Section IV
C. ASME Section VIII
D. ASME Section IX
Answer: B
Rationale: ASME Section IV sets the industry construction metrics for heating boilers
operating within low-pressure limitations.
Question 6
What code symbol stamp is placed on a low-pressure cast-iron or steel heating boiler
manufactured to ASME Section IV specifications?
A. "S" Stamp
B. "U" Stamp
,C. "H" Stamp
D. "R" Stamp
Answer: C
Rationale: The "H" stamp designates a heating boiler constructed to Section IV
parameters. "S" stands for high-pressure power boilers, and "U" stands for pressure
vessels.
Question 7
Under Michigan Boiler Rules, what is the minimum number of safety valves required on
a low-pressure steam heating boiler?
A. At least one safety valve of sufficient capacity
B. Exactly two valves regardless of size
C. Three separate valves piped in parallel
D. Safety valves are optional on low-pressure systems
Answer: A
Rationale: Every steam boiler must feature at least one ASME-rated and certified safety
valve to relieve excessive pressure blocks.
Question 8
What is the standard pressure setting for a safety relief valve mounted on a residential
low-pressure hot-water heating boiler?
A. 15 psi
B. 30 psi
C. 60 psi
D. 125 psi
Answer: B
Rationale: While steam is limited to 15 psi, standard low-pressure hot-water heating
boilers typically deploy safety relief valves set to open at 30 psi.
Question 9
Which device must be installed on a low-pressure steam boiler to prevent an automatic
burner cycle if the internal water level drops below safe parameters?
A. An automatic water feeder loop only
, B. A low-water fuel cutoff (LWCO) control switch
C. A motorized pressure-reducing valve
D. A secondary expansion tank panel
Answer: B
Rationale: An LWCO shuts down electricity to the burner if water drops below a safe
baseline, avoiding catastrophic structural melting or dry-firing.
Question 10
To prevent a rapid siphon action from emptying a low-pressure steam boiler, what type
of structural piping configuration is mandatory on the return loop line?
A. A horizontal check valve manifold
B. A Hartford Loop configuration
C. A vertical drop separator chamber
D. An open-air barometric vent line
Answer: B
Rationale: The Hartford Loop matches pressures and balances water levels, ensuring a
broken return line cannot completely siphon water out of the heating block.
Question 11
What color flag or marking is used by utility locators to identify buried natural gas lines
before a boiler room excavation or trenching project begins?
A. Red
B. Yellow
C. Blue
D. Green
Answer: B
Rationale: Under the standardized APWA uniform color code, yellow designates gas,
oil, steam, petroleum, or gaseous materials.
Question 12
What is the minimum required horizontal clearance workspace that must be maintained
in front of a low-pressure heating boiler to allow safe burner servicing?
A. 12 inches
