Maryland Boiler Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the Maryland Boiler Operator Vocabulary Game
A free word game for the Maryland Boiler Operator exam. Each round shows a clue for one of 20 exam terms across 11 topics. Recall the term, spell it out, then read a short explanation. Rounds pick a random term, so you can keep playing as long as you like.
How to Play
- 1Read the clue and type a term with the right number of letters (3 to 6). Abbreviations count: type the letters only.
- 2Press Check Answer or Enter. Each letter changes color to show how close you are.
- 3You have 6 tries. Stuck? Need a hint? asks the AI tutor for a nudge without giving the term away, and Skip moves to a new term.
- 4After the round, read the explanation, ask the AI to explain it, share your result, or press Next.
- ARight letter, right spot
- AIn the term, wrong spot
- ANot in the term
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Topics in the Maryland Boiler Operator Vocabulary Game
Fundamentals
Basic electricity
Boiler types
Fuel and combustion
Feedwater and valves
Sequential operations
Inspections and maintenance
Central station and chillers
Water treatment
Emergency operations
Auxiliary equipment
Sources for these terms (8)
- Maryland Business Occupations and Professions §6.5-101 — Definitions · Source checked 2026-11-03
- COMAR 09.12.01.04 — Equipment (Board of Boiler Rules) · Source checked 2026-11-03
- COMAR 09.12.01.23 — Power Boiler, Existing Installation: Other Equipment · Source checked 2026-11-03
- COMAR 09.12.01.30 — Stamping · Source checked 2026-11-03
- Improving Steam System Performance: A Sourcebook for Industry (U.S. Department of Energy) · Source checked 2026-11-03
- Guide to Low-Emission Boiler and Combustion Equipment Selection (U.S. Department of Energy / Oak Ridge National Laboratory) · Source checked 2026-11-03
- U.S. Energy Information Administration Glossary — B (Btu, British thermal unit) · Source checked 2026-11-03
- NIST Special Publication 330 (2019 Edition), The International System of Units (SI) · Source checked 2026-11-03
About the MD Boiler Operator Exam
Maryland Board of Stationary Engineers state licensing, with PSI qualification review and computer-based examinations for Grades 1–5. Grades 5 and 4: 60 scored-outline questions, approved open book; Grades 3, 2 and 1: 80, closed book. The PSI bulletin also permits 5–10 additional unscored experimental questions with their answering time excluded from the examination clock. Grade authority follows regulated horsepower and building/attendance conditions; the credential is not an unrestricted engineering licence.
Exam sponsor: Maryland Board of Stationary Engineers (Department of Labor); exams delivered by PSI Services LLC. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Grades 5 and 4: 60 scored-outline questions, approved open book; Grades 3, 2 and 1: 80, closed book. The PSI bulletin also permits 5–10 additional unscored experimental questions with their answering time excluded from the examination clock.
Time Limit
120 minutes for each grade’s scored examination; experimental-item answering time does not count against it.
Passing Score
70%
Exam / Certification Fees
$65 PSI examination per attempt; separate Board application $31.50 and original licence $82 (Grade 1), $63 (Grades 2–3) or $43.50 (Grades 4–5), under the fee schedule effective 1 July 2025.
Exam sponsor websiteReported exam pass rate: Not published. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Official sources
- Maryland Board of Stationary Engineers (MD Dept. of Labor)
- PSI MD Stationary Engineer Qualification Information Bulletin
- Maryland Statute Title 6.5, Section 6.5-302 (Grade Authority & Attendance)
- COMAR 09.17 — Maryland Board of Stationary Engineers Regulations
- Board fee schedule effective 1 July 2025
- Board qualification requirements
- Current Board licensing FAQ
Frequently Asked Questions
Is the MD Boiler Operator vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How does the MD Boiler Operator vocabulary game work?
Each round shows a clue for one of 20 MD Boiler Operator terms. Guess the term in six tries: green means the right letter in the right spot, yellow means the letter is in the term but in another spot, and gray means it is not in the term. After the round, read the explanation and play the next term.
Where do the MD Boiler Operator terms come from?
OpenExamPrep researched each term from the Maryland Board of Stationary Engineers (Department of Labor); exams delivered by PSI Services LLC content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
Which Maryland credential does this page cover?
The Maryland Board of Stationary Engineers state licence, Grades 1–5, with examinations delivered by PSI. It is not Minnesota’s special-boiler credential or a separate local Baltimore certificate. Grade 5 covers regulated 30–99 HP units in non-public buildings, Grade 4 the same capacity in any building, Grade 3 100–299 HP, Grade 2 300–499 HP and Grade 1 at least 500 HP, subject to statutory conditions. The largest single regulated unit determines capacity, not the sum of boilers.
How many questions, how long, and what passing mark?
Grades 5 and 4: 60 scored-outline questions, approved open book; Grades 3, 2 and 1: 80, closed book. The PSI bulletin also permits 5–10 additional unscored experimental questions with their answering time excluded from the examination clock. Each scored examination allows 120 minutes and requires 70%: 42 of 60 or 56 of 80. The bulletin is marked updated 1 September 2024, with a separate online-application notice effective 31 March 2025.