Maryland Stationary Engineer Grade 1 Exam
Complete Practice Test Bank | 250 Questions with
Verified Answers & Detailed Rationales | Updated 2026
A+ Study Guide
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) 500 BHP
Rationale: Maryland law clearly delineates license grades based on total boiler horsepower. A
Grade 1 license is required to oversee equipment of 500 or more horsepower. 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) Operating at a pressure exceeding 15 psi
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 high-pressure systems exceeding 500
horsepower .
,Question 3
Which license grade is required to supervise a facility with a single boiler rated at 450 boiler
horsepower (BHP)?
A) Grade 1
B) Grade 2
C) Grade 3
D) Grade 4
Answer: B) Grade 2
Rationale: Under COMAR 09.12.01, a Grade 2 license is required for facilities where the largest
single boiler exceeds 300 BHP but is less than 500 BHP. Grade 1 is required for ≥500 BHP. Grades
3 and 4 are for smaller installations .
Question 4
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) 500 HP or more
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 5
According to the Maryland Stationary Engineers Act, which piece of equipment triggers the
requirement for a licensed engineer?
A) Any air compressor regardless of pressure
B) Any equipment generating more than 15 psi and operating at 30 or more HP
C) Any equipment operating at 100 psi regardless of HP
D) Any equipment requiring a building permit
Answer: B) Any equipment generating more than 15 psi and operating at 30 or more HP
,Rationale: The Maryland Stationary Engineers Act governs equipment that operates at a
pressure of more than 15 PSI and 30 or more horsepower (1,003,000 Btu/hr or 1034 lb/hr
steam or greater) .
Question 6
What are the horsepower limits for each stationary engineer license grade in Maryland?
A) Grade 5: 30-99 HP; Grade 4: 100-299 HP; Grade 3: 300-499 HP; Grade 2: 500-999 HP; Grade
1: 1000+ HP
B) Grade 5: 30-99 HP; Grade 4: 30-99 HP (public); Grade 3: 100-299 HP; Grade 2: 300-499 HP;
Grade 1: 500+ HP
C) Grade 4: 30-99 HP; Grade 3: 100-299 HP; Grade 2: 300-499 HP; Grade 1: 500+ HP
D) Grade 3: 50-199 HP; Grade 2: 200-499 HP; Grade 1: 500+ HP
Answer: B
Rationale: The Maryland Stationary Engineers Act establishes:
• Grade 5 - 30 to 99 horsepower (in a building not open for public use)
• Grade 4 - 30 to 99 horsepower (in any building regardless of use)
• Grade 3 - 100 to 299 horsepower
• Grade 2 - 300 to 499 horsepower
• Grade 1 - 500 or more horsepower
Question 7
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) 2 years
Rationale: Maryland stationary engineer licenses expire on a biennial basis. Continuing
education is required for renewal .
, Question 8
What is the minimum age to apply for a Maryland Stationary Engineer license?
A) 16
B) 18
C) 21
D) 25
Answer: B) 18
Rationale: Applicants for a Maryland Stationary Engineer license must be at least 18 years old .
Question 9
What is the minimum passing score required for the Maryland Grade 1 stationary engineer
examination?
A) 60%
B) 65%
C) 70%
D) 75%
Answer: C) 70%
Rationale: According to PSI Examination Services, which administers the test, candidates must
achieve a minimum passing score of 70% on the examination .
Question 10
Who administers the stationary engineer licensing examinations for the State of Maryland?
A) The Maryland Department of Labor directly
B) The local county fire marshal
C) PSI Examination Services
D) The National Board of Boiler and Pressure Vessel Inspectors
Answer: C) PSI Examination Services
Complete Practice Test Bank | 250 Questions with
Verified Answers & Detailed Rationales | Updated 2026
A+ Study Guide
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) 500 BHP
Rationale: Maryland law clearly delineates license grades based on total boiler horsepower. A
Grade 1 license is required to oversee equipment of 500 or more horsepower. 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) Operating at a pressure exceeding 15 psi
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 high-pressure systems exceeding 500
horsepower .
,Question 3
Which license grade is required to supervise a facility with a single boiler rated at 450 boiler
horsepower (BHP)?
A) Grade 1
B) Grade 2
C) Grade 3
D) Grade 4
Answer: B) Grade 2
Rationale: Under COMAR 09.12.01, a Grade 2 license is required for facilities where the largest
single boiler exceeds 300 BHP but is less than 500 BHP. Grade 1 is required for ≥500 BHP. Grades
3 and 4 are for smaller installations .
Question 4
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) 500 HP or more
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 5
According to the Maryland Stationary Engineers Act, which piece of equipment triggers the
requirement for a licensed engineer?
A) Any air compressor regardless of pressure
B) Any equipment generating more than 15 psi and operating at 30 or more HP
C) Any equipment operating at 100 psi regardless of HP
D) Any equipment requiring a building permit
Answer: B) Any equipment generating more than 15 psi and operating at 30 or more HP
,Rationale: The Maryland Stationary Engineers Act governs equipment that operates at a
pressure of more than 15 PSI and 30 or more horsepower (1,003,000 Btu/hr or 1034 lb/hr
steam or greater) .
Question 6
What are the horsepower limits for each stationary engineer license grade in Maryland?
A) Grade 5: 30-99 HP; Grade 4: 100-299 HP; Grade 3: 300-499 HP; Grade 2: 500-999 HP; Grade
1: 1000+ HP
B) Grade 5: 30-99 HP; Grade 4: 30-99 HP (public); Grade 3: 100-299 HP; Grade 2: 300-499 HP;
Grade 1: 500+ HP
C) Grade 4: 30-99 HP; Grade 3: 100-299 HP; Grade 2: 300-499 HP; Grade 1: 500+ HP
D) Grade 3: 50-199 HP; Grade 2: 200-499 HP; Grade 1: 500+ HP
Answer: B
Rationale: The Maryland Stationary Engineers Act establishes:
• Grade 5 - 30 to 99 horsepower (in a building not open for public use)
• Grade 4 - 30 to 99 horsepower (in any building regardless of use)
• Grade 3 - 100 to 299 horsepower
• Grade 2 - 300 to 499 horsepower
• Grade 1 - 500 or more horsepower
Question 7
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) 2 years
Rationale: Maryland stationary engineer licenses expire on a biennial basis. Continuing
education is required for renewal .
, Question 8
What is the minimum age to apply for a Maryland Stationary Engineer license?
A) 16
B) 18
C) 21
D) 25
Answer: B) 18
Rationale: Applicants for a Maryland Stationary Engineer license must be at least 18 years old .
Question 9
What is the minimum passing score required for the Maryland Grade 1 stationary engineer
examination?
A) 60%
B) 65%
C) 70%
D) 75%
Answer: C) 70%
Rationale: According to PSI Examination Services, which administers the test, candidates must
achieve a minimum passing score of 70% on the examination .
Question 10
Who administers the stationary engineer licensing examinations for the State of Maryland?
A) The Maryland Department of Labor directly
B) The local county fire marshal
C) PSI Examination Services
D) The National Board of Boiler and Pressure Vessel Inspectors
Answer: C) PSI Examination Services
