New Jersey licenses boiler operators and operating engineers by seal: the Black Seal for boiler operators, and the Blue Seal (third grade), Red Seal (second grade), and Gold Seal (first grade) for engineers, each classified by equipment type. Every license is earned by written examination before the Mechanical Inspection Bureau of Boiler and Pressure Vessel Compliance, with passing grades of 80 percent for Gold, 70 percent for Red and Blue, and 65 percent for operator licenses. This program prepares candidates for those written examinations.
This program is part of the expanding PassProfessor catalog — join the notify list and we’ll email you when enrollment opens.
What the seal system licenses
New Jersey runs one of the oldest operator licensing systems in the country, and it organises the boiler room as a ladder. At the base stands the boiler operator, identified by a black seal. Above the operator stand three engineer grades, identified by colour and letter together: the third grade engineer carries a blue seal and the letter C, the second grade engineer a red seal and the letter B, and the first grade engineer a gold seal and the letter A. A second axis cuts across the grades: numbers identify the equipment the license covers, so a steam engineer of the third grade in a stationary steam plant holds a 1C, a refrigeration engineer of the second grade holds a 2B, and the gold seal at the top of the steam classifications is the 1A.
The system is plant-sized, not merely title-sized. Under N.J.A.C. 12:90-3.9, a C grade engineer of the proper classification may act as chief engineer of a plant to 1,000 boiler horsepower, 100 engine horsepower, or 65 tons of refrigerating capacity; a B grade chief may run a plant to 3,000 boiler horsepower, 500 engine horsepower, or 300 tons; an A grade engineer may act as chief engineer in any plant. The license a candidate sits for is therefore a direct statement about the size of plant the State will trust to that person’s charge, and the examination is graded to match.
The licensing system at a glance
| Item | Verified position |
|---|---|
| Licenses in this program | Boiler Operator (Black Seal) – low pressure, high pressure in-charge, and special licenses; Third Grade Engineer (Blue Seal, grade C); Second Grade Engineer (Red Seal, grade B); First Grade Engineer (Gold Seal, grade A); engineer grades are also classified by equipment number (1 steam, 2 refrigeration, 3 nuclear, 8 steam portable) |
| Licensing authority | New Jersey Department of Labor and Workforce Development, Mechanical Inspection Bureau of Boiler and Pressure Vessel Compliance, under N.J.S.A. 34:7-1 et seq. and N.J.A.C. 12:90 |
| Examination form | Written examination for each license, held each month in Trenton and at other times and places in the State as warranted, conducted by an examiner (N.J.A.C. 12:90-8.14). The rule sets no fixed question count; examinations consist of as many questions, of such nature, as the Bureau considers appropriate for the license sought |
| Passing grades (N.J.A.C. 12:90-8.15) | Grade A (Gold Seal): an average of 80 percent or more. Grade B (Red Seal) and Grade C (Blue Seal): an average of 70 percent or more. All other licenses: a minimum passing grade of 65 percent, except the boiler operator special license, which is issued on a passing grade of 60 percent |
| Age | No license is granted to a person under 18 years of age (N.J.A.C. 12:90-8.2) |
| Experience window | Experience relied on must be pertinent, applicable, and full-time, and must have been completed within seven years of filing the application (N.J.A.C. 12:90-8.2) |
| Authority fees | State fees under N.J.A.C. 12:90-8.2 and 12:90-8.19: $200 for each examination and license issued; $160 for a raise of grade or an additional classification; renewal $80 for one year or $160 for three years. These are New Jersey State fees, not PassProfessor charges |
| Standards frame | ASME Section VI (heating boilers) and Section VII (power boilers), ASME CSD-1, and the further standards N.J.A.C. 12:90-3.10 incorporates for each plant type |
Who must be licensed, and on what equipment
N.J.A.C. 12:90-3.3 lists the equipment that requires a licensed operator: steam boilers and similar steam-generating equipment with safety valves set higher than 15 psig and rated over six horsepower; steam or hot water heating plants exceeding 499 square feet of heating surface, 100 boiler horsepower, 1,000 kilowatts, or 4,000,000 BTU input where the building served is occupied; steam turbines, steam engines, and other prime movers rated over six horsepower; refrigerating plants using flammable or toxic refrigerants rated over 24 tons; and hoisting machines with booms over 99 feet. Low pressure plants follow their own rule: a licensed person is required above the same thresholds in an occupied building, and a low pressure licensee may operate low pressure boilers of unlimited horsepower under 12:90-3.5.
The grades, license by license
Black Seal – boiler operator
The entry license, and for many building operators the working license of a career. Eligibility under 12:90-8.4 is three months of experience as a helper, apprentice, or assistant to a licensed operator of equipment requiring the license, and the Bureau may ask to review the boiler operator’s log. The low pressure route adds an alternative under 12:90-8.5: thirty full working days of intensive one-on-one training in a Bureau-approved program. The high pressure in-charge route under 12:90-8.6 accepts the same three months, or six weeks of intensive training in a program established by the chief engineer and approved by the Bureau; six months as a licensed low pressure operator can shorten the requirement, and a special license up to 100 horsepower requires thirty days of experience with such equipment. A boiler operator holding an in-charge license may act as chief engineer of an installation of 500 boiler horsepower or less, and may take charge of a shift, under a properly licensed chief, in installations up to 1,000 boiler horsepower.
Blue Seal – third grade engineer (grade C)
The first engineer grade. For the steam classifications (1C, 8C), 12:90-8.7 requires the applicant to hold a boiler operator in-charge high pressure license and to have at least six months of subsequent experience in the operation of equipment requiring supervision by a third grade engineer, or as an assistant on equipment requiring a third grade license for shift operation. Out-of-state experience can count where the applicant has served at least two years as a boiler operator of high pressure boilers over 500 horsepower. The refrigeration third grade (2C) has its own experience ladder at 12:90-8.8, built on assistant and operator time on toxic and flammable refrigeration plants and on large nontoxic units.
Red Seal – second grade engineer (grade B)
Under 12:90-8.11, the red seal candidate must hold a third grade license and have at least one year of subsequent practical experience in the operation of equipment requiring supervision by a second grade or first grade engineer; equivalent experience from another jurisdiction may be substituted with Bureau approval. The step is supervisory in character: the B grade chief’s ceiling of 3,000 boiler horsepower takes in the State’s large institutional and industrial plants.
Gold Seal – first grade engineer (grade A)
The top of the system. Under 12:90-8.12, the candidate must hold a second grade license and then either serve one year as chief engineer in a plant requiring supervision by a second grade engineer, or accumulate two years of practical experience as an operating engineer in a plant requiring supervision by a first grade engineer; equivalent out-of-jurisdiction experience and licenses may also be presented with documentation. The gold seal examination is the only one in the system with an 80 percent passing average, and it is the grade New Jersey requires at the head of its largest plants.
What the written examinations cover
The rule frames the examination’s territory at 12:90-8.14(e): questions pertain to the safe operation of steam and hot water boilers, appliances, auxiliaries, and any other equipment common to modern plant operation, as covered by the licensing Act. Around that core, the duties rule at 12:90-3.10 names the standards a licensed person works to, and they map the study field honestly: ASME Section VII for the care of power boilers and ASME Section VI for heating boilers, ASME CSD-1 for controls and safety devices on automatically fired boilers, and for high pressure plants the combustion and fuel standards the rule incorporates, including NFPA 85. The operator’s log is itself examined knowledge: plants over 100 horsepower keep a log with the contents ASME Section VII paragraph 6.632 outlines for high pressure plants and Section VI for low pressure plants, signed by every operator on the shift.
Two features of the New Jersey sitting deserve plain statement. The examinations are written, held each month in Trenton and at other times and places in the State when warranted, and conducted by an examiner. And the rule deliberately fixes no question count: the examination consists of as many questions, and questions of such nature, as the Bureau considers appropriate for the license desired. Preparation built on a rumoured fixed count is preparation built on sand; preparation built on the rule’s own territory matches the sitting the Bureau actually gives.
Who these licenses serve
The seals map onto New Jersey’s building stock with unusual precision. The black seal low pressure operator is the licensed presence in the occupied schools, apartment buildings, and commercial blocks whose heating plants cross the rule’s thresholds; the high pressure in-charge operator runs hospital, campus, and factory boiler plants at shift level; and the blue, red, and gold seals staff the supervisory ladder above them, in the power houses, district plants, refineries, and large institutions where a chief engineer must hold a grade matched to the plant’s total capacity. Because the license is stamped with both a grade and an equipment classification, the ladder from helper to gold seal chief is a legible career in a way few states reproduce.
The route, in order
The route runs: build the experience the license requires, on equipment of the right class, inside the seven-year window the application rule sets; apply on the Bureau’s forms, with the operating engineer’s or senior management’s endorsement the rule requires, and the State fee ($200 for an original examination and license, $160 for a raise of grade or an added classification); sit the written examination when notified, at the passing average for the grade (80 gold, 70 red and blue, 65 operator, 60 special). Renewal is by signed identification card and fee, $80 for one year or $160 for three years, and a license renewed late follows the rule’s late-renewal terms rather than a fresh examination, provided the application lands within three years of expiration.
What makes these examinations demanding
Three things. The first is that the standard rises with the grade in both directions at once: the gold seal asks for the broadest plant experience and then sets the passing average at 80 percent, ten points above the grades below it. The second is that the examination territory is the whole of modern plant operation as the Bureau judges it – candidates who studied only boiler theory meet auxiliaries, controls, refrigeration interfaces, and log discipline in the same sitting. The third is the experience gate itself: eligibility is documentary, endorsed, and recent, and an application whose experience cannot be verified does not reach the examination room at all.
The licenses at work
A New Jersey seal is a working instrument, not a wall decoration: the rule requires the license to be framed and posted adjacent to the equipment, in the engineer’s office, or in the plant office, available for inspection. The licensed person on watch owes constant attention to high pressure boilers and refrigeration plants, or a control room station with direct and immediate intervention capability; the low pressure operator owes the plant presence and the twice-in-24-hours monitoring rhythm the duties rule prescribes. The seal system examines a person for a defined legal post, and its holders carry defined legal duties from the first shift after the license issues.
What the PassProfessor program will cover
Practice in the examination’s own shape. The New Jersey examinations are written examinations taken in person before a State examiner, and the program in the works practises in that shape: written sets built to the rule’s stated territory – safe operation of steam and hot water boilers, appliances, auxiliaries, and the equipment of modern plant operation – with separate tracks for the black seal operator licenses and for each engineer grade and classification, because a 1C sitting and a 2B sitting are different examinations.
Written from the primary sources. The program is written from N.J.A.C. 12:90 itself – the classification, eligibility, examination, and duties rules – and from the ASME and NFPA standards those rules incorporate. Where the grades differ, and on passing averages, experience, and chief-engineer ceilings they differ sharply, the program teaches the rule for the grade the candidate is actually sitting.
The whole candidate, not only the test-taker. Around the item practice, the program carries the licensing route as the Bureau publishes it – endorsement, the seven-year experience window, fees, the monthly Trenton sittings, re-examination timing, and renewal – because the examination is one step in a documented route, and candidates plan better when the whole route is mapped.
Preparation only. This is preparation for written examinations administered by the State of New Jersey. PassProfessor is not affiliated with the New Jersey Department of Labor and Workforce Development or its Mechanical Inspection Bureau of Boiler and Pressure Vessel Compliance, no completion of this program is reported to the Bureau, and nothing in the program substitutes for any step in the licensing process.
Tell me when enrollment opens. The New Jersey Stationary Engineer and Boiler Operator program is in the works and enrollment is not yet open. Leave an email address and PassProfessor will write to you when the program is ready – and only about this program. No date is promised, because the program will open when it meets the standard described above, not before.
Frequently asked questions
What is the difference between the Black Seal and the Blue, Red, and Gold Seals?
The Black Seal identifies a boiler operator. The coloured seals identify engineer grades: Blue Seal is the third grade (grade C), Red Seal the second grade (grade B), and Gold Seal the first grade (grade A). Numbers added to the letter identify the equipment classification – 1 for steam stationary boiler and steam prime mover, 2 for refrigeration plants, and so on – so a 1A is the gold seal steam engineer and a 2C is the blue seal refrigeration engineer.
What passing score does each New Jersey examination require?
Under N.J.A.C. 12:90-8.15, an average of 80 percent or more earns the grade A (Gold Seal) license; 70 percent or more earns grade B (Red Seal) and grade C (Blue Seal); all other licenses carry a minimum passing grade of 65 percent, except the boiler operator special license at 60 percent.
How much experience does the Black Seal require?
Three months of experience as a helper, apprentice, or assistant to a licensed operator of equipment requiring the license, under 12:90-8.4. The low pressure and high pressure routes also accept Bureau-approved intensive training – thirty full working days for low pressure, six weeks for high pressure in-charge – run one-on-one with a training log.
How large a plant can each grade run as chief engineer?
Under 12:90-3.9, a C grade (Blue Seal) chief is limited to plants up to 1,000 boiler horsepower, 100 engine horsepower, or 65 tons of refrigeration; a B grade (Red Seal) chief to 3,000 boiler horsepower, 500 engine horsepower, or 300 tons; an A grade (Gold Seal) engineer may act as chief in any plant; a boiler operator in charge may act as chief up to 500 boiler horsepower.
How many questions are on the New Jersey examinations?
The rule does not publish a number. N.J.A.C. 12:90-8.14(e) provides that examinations consist of as many questions, of such nature, as the Bureau of Boiler and Pressure Vessel Compliance considers appropriate for the license desired, on the safe operation of steam and hot water boilers, appliances, auxiliaries, and other equipment common to modern plant operation. Fixed counts quoted elsewhere are not the State’s published position.
What does the State charge for the examination and license?
Under 12:90-8.2, the fee for each examination and for any license issued is $200, and the fee for a raise of grade or an additional classification is $160. Renewal is $80 for one year or $160 for three years under 12:90-8.19. These are New Jersey State fees.
What happens if I fail the examination?
Under 12:90-8.16, re-examination cannot occur for at least three months, and one re-examination is allowed without additional charge within six months of the original examination. After a third failure, or if an application is cancelled, the candidate waits three months and reapplies with a new application and fee.
Can experience from another state count toward a New Jersey grade?
Yes, within limits the Bureau approves. The second and first grade rules allow equivalent experience from another jurisdiction to be substituted with Bureau approval and documentation of that jurisdiction’s licensing and eligibility requirements, and 12:90-8.13 lets the Bureau consider equivalent amounts of experience for a grade or classification.
Can education substitute for operating experience?
In part. Under 12:90-8.13, an applicant may substitute, for up to 50 percent of the listed experience, non-operating experience or satisfactory proof of formal education or academic study embracing the equipment.
Is PassProfessor affiliated with the State of New Jersey?
No. PassProfessor is an independent preparation provider, not affiliated with the New Jersey Department of Labor and Workforce Development or its Mechanical Inspection Bureau of Boiler and Pressure Vessel Compliance. The program confers no license and reports nothing to the Bureau.