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Maryland Stationary Engineer Grade 2 Exam 2026/2027 – 300 Practice Questions with Answers & Rationales | Pass Your 300-499 HP Boiler License & Supervisory Certification!

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Ace the Maryland Stationary Engineer Grade 2 licensing exam with this comprehensive 300-question practice guide covering ALL exam sections for 300-499 HP boiler plants! This updated 2026/2027 edition includes detailed rationales for Maryland Regulations & Licensing, Boiler Operation & Combustion, Steam Fittings & Safety Devices, Water Treatment & Chemistry, Pumps/Piping/Valves, Electricity & Controls, HVAC & Refrigeration, Fuel Systems & Burners, and Safety/Inspections/Maintenance. Master supervisory responsibilities, high-pressure boiler operation up to 499 HP, ASME Code compliance, safety valve testing, combustion efficiency, feedwater treatment, and emergency response protocols. Perfect for Grade 3 engineers upgrading to Grade 2, or professionals seeking chief engineer/supervisory status – pass your Maryland Board of Stationary Engineers exam with confidence!

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MARYLAND STATIONARY ENGINEER GRADE 2
PRACTICE QUESTIONS MCQs FORMAT| REAL EXAM WITH VERIFIED
QUESTIONS AND ANSWERS - COMPREHENSIVE LATEST VERSION
2026/2027 (PASS GUARANTEE)

SECTION 1: LICENSING & MARYLAND REGULATIONS (Questions 1–40)
QUESTION 1
A stationary engineer is assigned to a plant with three boilers rated at 150 HP, 200
HP, and 150 HP. What is the total horsepower, and which license grade is
required to act as chief engineer?
A) 450 HP, Grade 2
B) 500 HP, Grade 2
C) 500 HP, Grade 1
D) 450 HP, Grade 3

Answer: C) 500 HP, Grade 1

Total horsepower = 150 + 200 + 150 = 500 HP. Maryland regulations limit a Grade
2 license to plants with 300–499 HP. At exactly 500 HP or greater, a Grade 1
license is mandatory. Therefore, this plant requires a Grade 1 engineer.



QUESTION 2
A Grade 2 stationary engineer in Maryland may operate boilers of any
horsepower and pressure without supervision, and may also:
A) Only operate electric boilers
B) Supervise Grade 3, 4, and 5 engineers
C) Only operate low-pressure boilers
D) Supervise only Grade 1 engineers

Answer: B) Supervise Grade 3, 4, and 5 engineers




1

,A Grade 2 license is a supervisory credential. It permits the holder to direct and
oversee lower-grade engineers (Grade 3, 4, and 5). A Grade 2 does not supervise
Grade 1 engineers, as Grade 1 is a higher classification.



QUESTION 3
What is the maximum total horsepower (HP) limit for a Maryland Grade 2
Stationary Engineer?
A) 100 HP
B) 300 HP
C) 499 HP
D) Unlimited

Answer: C) 499 HP

The Grade 2 license is restricted to plants with total connected boiler horsepower
not exceeding 499 HP. Once the total reaches 500 HP, a Grade 1 license becomes
legally required.



QUESTION 4
An engineer holds a valid Maryland Grade 2 license but is assigned to a plant with
600 HP. What action is legally required?
A) No action, Grade 2 covers all
B) Obtain a Grade 1 license within 30 days
C) Operate only as an assistant under a Grade 1
D) Shut down the plant immediately

Answer: C) Operate only as an assistant under a Grade 1

A Grade 2 cannot serve as the responsible chief or shift engineer for a 600 HP
plant. However, they may work as an assistant or subordinate operator under the
direct supervision of a Grade 1 engineer who holds legal responsibility.

2

,QUESTION 5
Which of the following is NOT a requirement to renew a Maryland Grade 2
license?
A) Payment of renewal fee
B) Submission of continuing education credits
C) Passing a physical agility test
D) No outstanding violations

Answer: C) Passing a physical agility test

Maryland does not require any physical agility or fitness test for license renewal.
Renewal conditions include fee payment, documented continuing education
hours, and a clean disciplinary record.



QUESTION 6
How many months of verifiable experience are required to apply for the Grade 2
examination in Maryland?
A) 12 months
B) 24 months
C) 36 months
D) 48 months

Answer: C) 36 months

The Maryland Board requires 36 months (3 years) of full‑time, verifiable
experience operating high‑pressure boilers and auxiliary equipment under the
supervision of a licensed engineer.



QUESTION 7

3

, If a Grade 2 engineer is found guilty of operating a boiler while under the
influence of alcohol, what is the minimum penalty?
A) Written warning
B) Fine only
C) Suspension or revocation of license
D) Mandatory retraining without suspension

Answer: C) Suspension or revocation of license

Operating under the influence is an egregious safety violation. The Board typically
suspends or revokes the license. The engineer must then reapply after a statutory
waiting period and may need to retake the examination.



QUESTION 8
The Maryland Board of Stationary Engineers derives its authority from which legal
code?
A) Maryland Public Safety Article
B) Maryland Business Occupations and Professions Article
C) Maryland Environment Code
D) Maryland Labor and Employment Article

Answer: B) Maryland Business Occupations and Professions Article

The Board's powers—including licensing, rulemaking, and discipline—are
established under the Business Occupations and Professions Article of the
Maryland Code.



QUESTION 9
A Grade 2 engineer may serve as chief engineer of a plant with:
A) Any low‑pressure heating boilers only
B) High‑pressure boilers not exceeding 499 total HP

4

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