ULTIMATE MARYLAND STATIONARY
ENGINEER BUNDLE
Grades 1–5 Questions, Answers & Study
Guide
2026/2027 Edition
ABOUT THIS GUIDE
This comprehensive practice exam bundle is based on the official Maryland State
Board of Stationary Engineers content outline, COMAR regulations, ASME Code
Sections I and IV, and the 2026/2027 PSI examination bulletin. The material covers
all license grades (1–5) with questions ranging from foundational knowledge to
advanced operational scenarios .
License Grade Limits (Maryland):
Grade 1: ≥ 500 HP – Any Building
Grade 2: 300–499 HP – Any Building
Grade 3: 100–299 HP – Any Building
Grade 4: 30–99 HP – Any Building
Grade 5: 30–99 HP – Not Open for Public Use
Exam Format:
Number of Questions: 60–100 (varies by grade)
Time Allowed: 2–4 hours
Minimum Passing Score: 70%
SECTION 1: LICENSE GRADES & JURISDICTIONAL REQUIREMENTS
,1. A facility has three boilers rated at 150 HP, 200 HP, and 100 HP. What is the
total horsepower, and which license grade is required?
A) 350 HP, Grade 2
B) 450 HP, Grade 2
C) 450 HP, Grade 1
D) 350 HP, Grade 3
Answer: B) 450 HP, Grade 2
Rationale: Total connected horsepower is 150 + 200 + 100 = 450 HP. Maryland
regulations require a Grade 2 license for plants with 300–499 HP. Grade 1 is only
required for 500 HP and above .
2. A facility has a single boiler rated at 500 HP. What license grade is
required?
A) Grade 1
B) Grade 2
C) Grade 3
D) Grade 4
Answer: A) Grade 1
Rationale: Grade 1 covers 500 HP and above. The threshold is exact—500 HP
requires a Grade 1 license .
3. Which license grade permits supervision of a plant with boilers totaling 250
HP?
A) Grade 1
B) Grade 2
C) Grade 3
, D) Grade 4
Answer: C) Grade 3
Rationale: Grade 3 covers 100–299 HP. This range includes 250 HP .
4. A building open to the public has boilers totaling 75 HP. What is the
minimum license grade required?
A) Grade 1
B) Grade 2
C) Grade 3
D) Grade 4
Answer: D) Grade 4
Rationale: Grade 4 covers 30–99 HP in buildings open for public use. Grade 5 is
restricted to buildings NOT open to the public .
5. What license grade is required for a 45 HP boiler in a private warehouse?
A) Grade 3
B) Grade 4
C) Grade 5
D) No license required
Answer: C) Grade 5
Rationale: Grade 5 covers 30–99 HP in buildings not open for public use .
6. An applicant holds a four-year mechanical engineering degree from an
accredited university. How much additional experience is required for a
Grade 2 license?
A) 36 months
, B) 24 months
K. K.
C) 12 months
K. K.
D) 0 months
K. K.
Answer: D) 0 months K. K. K.
Rationale: Maryland regulations grant a full waiver of the experience requirement
K. K. K. K. K. K. K. K. K. K.
for applicants holding a 4-year degree in mechanical engineering from an
K. K. K. K. K. K. K. K. K. K. K.
accredited university .
K. K. K.
7. What is the minimum experience requirement to take the Grade 2
K. K. K. K. K. K. K. K. K. K.
examination?
K.
A) 12 months as a Grade 3 engineer
K. K. K. K. K. K. K.
B) 24 months as a Grade 4 engineer and a master HVAC license
K. K. K. K. K. K. K. K. K. K. K. K.
C) 36 months as a Grade 3 engineer under a Grade 2 or 1
K. K. K. K. K. K. K. K. K. K. K. K. K.
D) An associate degree in thermodynamics
K. K. K. K. K.
Answer: C) 36 months as a Grade 3 engineer under a Grade 2 or 1
K. K. K. K. K. K. K. K. K. K. K. K. K. K.
Rationale: The Maryland Board requires 36 months of documented experience as
K. K. K. K. K. K. K. K. K. K.
an active Grade 3 engineer under the supervision of a licensed Grade 2 or Grade 1
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
engineer .
K. K.
8. According to COMAR, what are the monitoring requirements for a
K. K. K. K. K. K. K. K. K.
computerized control system on a 350 HP steam boiler?
K. K. K. K. K. K. K. K. K.
A) Must monitor and indicate stack temperature
K. K. K. K. K. K.
B) Must monitor, indicate, and record stack temperature, burner status, and
K. K. K. K. K. K. K. K. K. K.
pressure
K.
C) No recording is required if an operator is present
K. K. K. K. K. K. K. K. K.
D) Only requires monitoring if pressure exceeds 150 PSI
K. K. K. K. K. K. K. K.
ENGINEER BUNDLE
Grades 1–5 Questions, Answers & Study
Guide
2026/2027 Edition
ABOUT THIS GUIDE
This comprehensive practice exam bundle is based on the official Maryland State
Board of Stationary Engineers content outline, COMAR regulations, ASME Code
Sections I and IV, and the 2026/2027 PSI examination bulletin. The material covers
all license grades (1–5) with questions ranging from foundational knowledge to
advanced operational scenarios .
License Grade Limits (Maryland):
Grade 1: ≥ 500 HP – Any Building
Grade 2: 300–499 HP – Any Building
Grade 3: 100–299 HP – Any Building
Grade 4: 30–99 HP – Any Building
Grade 5: 30–99 HP – Not Open for Public Use
Exam Format:
Number of Questions: 60–100 (varies by grade)
Time Allowed: 2–4 hours
Minimum Passing Score: 70%
SECTION 1: LICENSE GRADES & JURISDICTIONAL REQUIREMENTS
,1. A facility has three boilers rated at 150 HP, 200 HP, and 100 HP. What is the
total horsepower, and which license grade is required?
A) 350 HP, Grade 2
B) 450 HP, Grade 2
C) 450 HP, Grade 1
D) 350 HP, Grade 3
Answer: B) 450 HP, Grade 2
Rationale: Total connected horsepower is 150 + 200 + 100 = 450 HP. Maryland
regulations require a Grade 2 license for plants with 300–499 HP. Grade 1 is only
required for 500 HP and above .
2. A facility has a single boiler rated at 500 HP. What license grade is
required?
A) Grade 1
B) Grade 2
C) Grade 3
D) Grade 4
Answer: A) Grade 1
Rationale: Grade 1 covers 500 HP and above. The threshold is exact—500 HP
requires a Grade 1 license .
3. Which license grade permits supervision of a plant with boilers totaling 250
HP?
A) Grade 1
B) Grade 2
C) Grade 3
, D) Grade 4
Answer: C) Grade 3
Rationale: Grade 3 covers 100–299 HP. This range includes 250 HP .
4. A building open to the public has boilers totaling 75 HP. What is the
minimum license grade required?
A) Grade 1
B) Grade 2
C) Grade 3
D) Grade 4
Answer: D) Grade 4
Rationale: Grade 4 covers 30–99 HP in buildings open for public use. Grade 5 is
restricted to buildings NOT open to the public .
5. What license grade is required for a 45 HP boiler in a private warehouse?
A) Grade 3
B) Grade 4
C) Grade 5
D) No license required
Answer: C) Grade 5
Rationale: Grade 5 covers 30–99 HP in buildings not open for public use .
6. An applicant holds a four-year mechanical engineering degree from an
accredited university. How much additional experience is required for a
Grade 2 license?
A) 36 months
, B) 24 months
K. K.
C) 12 months
K. K.
D) 0 months
K. K.
Answer: D) 0 months K. K. K.
Rationale: Maryland regulations grant a full waiver of the experience requirement
K. K. K. K. K. K. K. K. K. K.
for applicants holding a 4-year degree in mechanical engineering from an
K. K. K. K. K. K. K. K. K. K. K.
accredited university .
K. K. K.
7. What is the minimum experience requirement to take the Grade 2
K. K. K. K. K. K. K. K. K. K.
examination?
K.
A) 12 months as a Grade 3 engineer
K. K. K. K. K. K. K.
B) 24 months as a Grade 4 engineer and a master HVAC license
K. K. K. K. K. K. K. K. K. K. K. K.
C) 36 months as a Grade 3 engineer under a Grade 2 or 1
K. K. K. K. K. K. K. K. K. K. K. K. K.
D) An associate degree in thermodynamics
K. K. K. K. K.
Answer: C) 36 months as a Grade 3 engineer under a Grade 2 or 1
K. K. K. K. K. K. K. K. K. K. K. K. K. K.
Rationale: The Maryland Board requires 36 months of documented experience as
K. K. K. K. K. K. K. K. K. K.
an active Grade 3 engineer under the supervision of a licensed Grade 2 or Grade 1
K. K. K. K. K. K. K. K. K. K. K. K. K. K. K. K.
engineer .
K. K.
8. According to COMAR, what are the monitoring requirements for a
K. K. K. K. K. K. K. K. K.
computerized control system on a 350 HP steam boiler?
K. K. K. K. K. K. K. K. K.
A) Must monitor and indicate stack temperature
K. K. K. K. K. K.
B) Must monitor, indicate, and record stack temperature, burner status, and
K. K. K. K. K. K. K. K. K. K.
pressure
K.
C) No recording is required if an operator is present
K. K. K. K. K. K. K. K. K.
D) Only requires monitoring if pressure exceeds 150 PSI
K. K. K. K. K. K. K. K.
