Maryland Stationary Engineer Grade 1
Exam. With Actual Questions & Verified
Answers ,Plus Explained
Rationales/Expert Verified For
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Exam Overview
The Maryland Stationary Engineer Grade 1 license is the highest level of
certification in Maryland, authorizing the operation of high-pressure steam systems
exceeding 500 horsepower (HP) . Candidates must pass a comprehensive
examination administered by PSI Examination Services with testing centers in
Baltimore, College Park, Hagerstown, Lanham, and Salisbury . The exam is
open-book and focuses on advanced thermodynamics, high-pressure boiler
operations, turbine systems, refrigeration, and Maryland codes .
Qualification Requirements :
• Five years of documented experience as an active MD Grade 2 under a
licensed MD Grade 1
• OR: 4-year Mechanical Engineering degree
, • OR: Professional Engineer licensure with 1 year Grade 2 experience
• OR: Valid Marine Engineer's certificate or Chief Petty Officer's certificate
• Passing score of at least 70%
License Renewal: Biennial (every 2 years) with continuing education required .
BLOCK 1: LICENSING, REGULATIONS & JURISDICTIONAL LIMITS
Question 1
Under the Maryland Stationary Engineers Act (Title 6.5), what is the minimum boiler
horsepower (BHP) that mandates a Grade 1 license?
A) 300 BHP
B) 400 BHP
C) 500 BHP
D) 750 BHP
Answer: C
Rationale: Maryland law clearly delineates license grades based on total boiler
horsepower. Grade 1 is required for equipment of 500 or more horsepower. By
comparison, Grade 2 covers 300-499 HP, Grade 3 covers 100-299 HP, and Grades
4 and 5 cover 30-99 HP .
,Question 2
According to Maryland law, what defines a "High Pressure" steam boiler?
A) Operating at or above 100 psi
B) Operating at a pressure exceeding 15 psi
C) Operating at 300 HP or more
D) Any boiler with a water volume exceeding 100 gallons
Answer: B
Rationale: Maryland law defines a high-pressure steam boiler as any boiler
operating at a pressure of more than 15 pounds per square inch (psi) .
Low-pressure boilers operate at or below 15 psi. A Grade 1 license is required for
any system above this threshold, specifically those exceeding 500 horsepower .
Question 3
A Grade 1 stationary engineer may oversee equipment with a total horsepower of:
A) 300-499 HP
B) 100-299 HP
C) 30-99 HP
D) 500 HP or more
Answer: D
Rationale: Grade 1 is the highest level of stationary engineer license in Maryland
and authorizes the operation of 500 horsepower or more. Lower grades have
progressively lower horsepower limits .
, Question 4
A stationary engineer with a Grade 1 license may perform which of the following
without additional certification?
A) Weld repairs on a pressure vessel
B) Operate a 600 BHP high-pressure boiler
C) Install a new gas regulator
D) Perform major electrical work
Answer: B
Rationale: The Grade 1 license authorizes operation of boilers of any size. Welding
requires separate certification, gas fitting requires a gas fitter's license, and
electrical work requires an electrical license. A Grade 1 license does not grant
authority to perform these specialized trades .
Question 5
Under Maryland law, a stationary engineer's license must be renewed every:
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Answer: B
Rationale: Maryland stationary engineer licenses expire on a biennial basis (every
2 years). Continuing education is required for renewal .
Exam. With Actual Questions & Verified
Answers ,Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
Exam Overview
The Maryland Stationary Engineer Grade 1 license is the highest level of
certification in Maryland, authorizing the operation of high-pressure steam systems
exceeding 500 horsepower (HP) . Candidates must pass a comprehensive
examination administered by PSI Examination Services with testing centers in
Baltimore, College Park, Hagerstown, Lanham, and Salisbury . The exam is
open-book and focuses on advanced thermodynamics, high-pressure boiler
operations, turbine systems, refrigeration, and Maryland codes .
Qualification Requirements :
• Five years of documented experience as an active MD Grade 2 under a
licensed MD Grade 1
• OR: 4-year Mechanical Engineering degree
, • OR: Professional Engineer licensure with 1 year Grade 2 experience
• OR: Valid Marine Engineer's certificate or Chief Petty Officer's certificate
• Passing score of at least 70%
License Renewal: Biennial (every 2 years) with continuing education required .
BLOCK 1: LICENSING, REGULATIONS & JURISDICTIONAL LIMITS
Question 1
Under the Maryland Stationary Engineers Act (Title 6.5), what is the minimum boiler
horsepower (BHP) that mandates a Grade 1 license?
A) 300 BHP
B) 400 BHP
C) 500 BHP
D) 750 BHP
Answer: C
Rationale: Maryland law clearly delineates license grades based on total boiler
horsepower. Grade 1 is required for equipment of 500 or more horsepower. By
comparison, Grade 2 covers 300-499 HP, Grade 3 covers 100-299 HP, and Grades
4 and 5 cover 30-99 HP .
,Question 2
According to Maryland law, what defines a "High Pressure" steam boiler?
A) Operating at or above 100 psi
B) Operating at a pressure exceeding 15 psi
C) Operating at 300 HP or more
D) Any boiler with a water volume exceeding 100 gallons
Answer: B
Rationale: Maryland law defines a high-pressure steam boiler as any boiler
operating at a pressure of more than 15 pounds per square inch (psi) .
Low-pressure boilers operate at or below 15 psi. A Grade 1 license is required for
any system above this threshold, specifically those exceeding 500 horsepower .
Question 3
A Grade 1 stationary engineer may oversee equipment with a total horsepower of:
A) 300-499 HP
B) 100-299 HP
C) 30-99 HP
D) 500 HP or more
Answer: D
Rationale: Grade 1 is the highest level of stationary engineer license in Maryland
and authorizes the operation of 500 horsepower or more. Lower grades have
progressively lower horsepower limits .
, Question 4
A stationary engineer with a Grade 1 license may perform which of the following
without additional certification?
A) Weld repairs on a pressure vessel
B) Operate a 600 BHP high-pressure boiler
C) Install a new gas regulator
D) Perform major electrical work
Answer: B
Rationale: The Grade 1 license authorizes operation of boilers of any size. Welding
requires separate certification, gas fitting requires a gas fitter's license, and
electrical work requires an electrical license. A Grade 1 license does not grant
authority to perform these specialized trades .
Question 5
Under Maryland law, a stationary engineer's license must be renewed every:
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Answer: B
Rationale: Maryland stationary engineer licenses expire on a biennial basis (every
2 years). Continuing education is required for renewal .
