- CHI-SE is issued by the City of Chicago Department of Buildings and tested through Continental Testing Services.
- The written exam is three hours, multiple-choice, with one correct answer among four options per question.
- A score of 70 or higher is required to pass; the exam fee is $150 and the initial license fee is $75.
- Applicants need to be at least 20 years old with two years of practical steam engine or boiler experience.
What Is CHI-SE Certification?
CHI-SE stands for the City of Chicago Stationary Engineer License Written Exam - the required written test that engineers, building operators, and facility maintenance professionals must pass to legally operate steam boilers and stationary engine equipment within Chicago city limits. This is not a national certification or a generic engineering credential; it is a municipal license tied specifically to the Chicago building code and enforced by the city's Department of Buildings.
If you operate, manage, or maintain steam boilers in a Chicago high-rise, hospital, university, industrial plant, or commercial property, this license is often a prerequisite for the job itself, not just a resume enhancement. For a plain-language breakdown of the term itself, see What Is CHI-SE? or the shorter definitional pieces at CHI-SE Meaning and What Does CHI-SE Stand For?.
Who Governs and Administers the Exam
The CHI-SE license is governed by the City of Chicago Department of Buildings, which sets the eligibility rules, license classes, and renewal requirements. The written examination itself, however, is administered by Continental Testing Services, a third-party testing vendor contracted to deliver and score the exam on the city's behalf.
Continental Testing Services also publishes the study guide most candidates use to prepare. The currently linked edition is copyright 2013, and it remains the published content outline referenced by test-takers today. Because the outline hasn't been substantially revised, older prep materials and instructor notes built around that guide are still relevant - a detail worth knowing before you assume you need the "latest" edition of anything.
Who Actually Needs This License
Stationary engineer licenses matter most to people responsible for the mechanical systems that keep large buildings running: boiler rooms, steam distribution, and the associated safety controls. Typical employers and roles include:
- Commercial and residential high-rise building operations staff
- Hospital and university facilities/plant engineering departments
- Industrial and manufacturing plants running steam-based processes
- Municipal and public building maintenance departments
- Contracting firms that service boiler and steam equipment across the city
If you're trying to understand what the license actually opens up in terms of employment, CHI-SE Jobs covers the roles and settings where the license is typically required, while Is the CHI-SE Certification Worth It? Complete ROI Analysis 2026 looks at the broader cost-versus-benefit picture.
Exam Format and Question Style
The written exam is a three-hour test made up entirely of multiple-choice questions. Each item presents one correct answer and three distractors - a straightforward four-option format with no negative marking mentioned in the published guidance, so every question is worth answering.
Because the format is consistent and predictable, much of your preparation advantage comes from knowing exactly how questions are phrased and which domains carry the most weight, rather than guessing at exam mechanics. For a deeper walkthrough of pacing, question patterns, and how the three hours typically break down across content areas, see How Hard Is the CHI-SE Exam? Complete Difficulty Guide 2026.
Key Takeaway
With three hours for a multiple-choice exam and no answer-elimination tricks required beyond standard test logic, time management is less about speed and more about accuracy on the heavily weighted domains.
The Nine Content Domains
The Continental Testing Services outline organizes exam content into nine domains. Two of them - Safe Operation of Steam Boilers and Controls - are weighted the heaviest at 16% each, meaning nearly a third of the exam sits inside those two areas alone.
Domain 5: Safe Operation of Steam Boilers (16%)
Candidates must understand start-up and shutdown sequences, pressure regulation, and the operating conditions that keep a boiler running safely under load.
- Recognizing unsafe operating conditions before failure
- Proper sequencing during firing, banking, and securing a boiler
Domain 6: Controls (16%)
This domain covers the automatic and manual control systems that regulate water level, pressure, and combustion - the systems that fail quietly until they don't.
- Low-water cutoffs and safety control logic
- Pressure and temperature control devices and their failure modes
Domain 2: Basic Principles and Units (12%) / Domain 4: Combustion Principles (12%) / Domain 8: Equipment and Safety (12%)
These three mid-weight domains together account for over a third of the exam and reward candidates who understand the underlying physics and equipment function, not just memorized rules.
- Units of pressure, temperature, and heat commonly tested in calculation-style questions
- Combustion efficiency and air-to-fuel relationships
- Standard equipment safety devices and their intended purpose
The remaining domains - Types of Boilers (10%), Maintenance and Safety (8%), Water and Steam Properties (7%), and Fuel Combustion and Byproducts (7%) - round out the outline. None of them should be skipped, since a 70-and-above passing score leaves little room to write off any single area entirely. For a full breakdown of every domain, sub-topics, and how they interrelate, read CHI-SE Exam Domains 2026: Complete Guide to All 9 Content Areas.
| Domain | Weight |
|---|---|
| Safe Operation of Steam Boilers | 16% |
| Controls | 16% |
| Basic Principles and Units | 12% |
| Combustion Principles | 12% |
| Equipment and Safety | 12% |
| Types of Boilers | 10% |
| Maintenance and Safety | 8% |
| Water and Steam Properties | 7% |
| Fuel Combustion and Byproducts | 7% |
Eligibility Requirements
Before you can even register for the exam, the Department of Buildings requires applicants to meet a basic eligibility profile:
- At least 20 years old
- Of good character, as assessed through the application process
- At least two years of practical experience in the management, operation, or construction of steam engines and boilers
These aren't paperwork formalities - they're meant to confirm you've actually spent time around live equipment before you're handed a license to operate it unsupervised. If you're unsure whether your background qualifies, or how experience gets documented during the application, CHI-SE Requirements 2026: Eligibility, Prerequisites & How to Qualify walks through the qualification process in detail.
Fees and Registration Mechanics
The current examination fee is $150, paid to sit for the written test administered by Continental Testing Services. Once you pass and complete the licensing process, a separate initial license fee of $75 applies. These are two distinct payments tied to two distinct steps - testing and licensing - and candidates should budget for both rather than assuming one fee covers the entire process.
For a complete accounting of every cost involved, including how the exam fee and license fee fit into the bigger financial picture, see CHI-SE Certification Cost 2026: Complete Pricing Breakdown. Scheduling logistics - including when exams are offered and how registration deadlines work - are covered in CHI-SE Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Passing Score
To pass the CHI-SE written exam, candidates need a score of 70 or higher. Because the test is multiple-choice with a fixed number of items per domain based on the published weightings, a 70 threshold means there is limited margin for skipping large sections of content, particularly the 16%-weighted Safe Operation of Steam Boilers and Controls domains.
A detailed look at how the scoring threshold interacts with domain weighting - and what that means for how many questions you can realistically miss - is available in CHI-SE Passing Score 2026: Exactly What You Need to Pass. If you want a broader sense of how challenging the exam tends to be for typical candidates, CHI-SE Pass Rate 2026: What the Data Shows examines the available data.
Building a Domain-Based Study Plan
Rather than studying generically, the most efficient approach for CHI-SE candidates is to allocate study time roughly in proportion to domain weight, front-loading the two 16% domains and the three 12% domains before moving to lighter-weighted material.
Safe Operation of Steam Boilers & Controls
- Master start-up/shutdown sequencing and low-water cutoff logic
- Drill control system diagrams until failure points are second nature
Basic Principles, Combustion, and Equipment
- Review units and calculation-style questions
- Study air-to-fuel ratios and standard safety devices
Boiler Types, Maintenance, Water/Steam, Fuel Byproducts
- Cover the four lighter-weighted domains without skipping any
- Run timed practice sets to simulate the three-hour format
This is the one place where general study methodology applies: spacing your review sessions across these three weeks, rather than cramming, gives the heavier domains repeated exposure before exam day. For a complete week-by-week walkthrough tailored to the full outline, see CHI-SE Study Guide 2026: How to Pass on Your First Attempt, and for a fast final review, use CHI-SE Cheat Sheet 2026: One-Page Review of Must-Know Facts.
You can also reinforce this plan by working through realistic practice questions on our practice test platform, which lets you test domain-by-domain rather than only in full-length simulations. Structured formal training programs are another option worth comparing against self-study - see CHI-SE Training for what those programs typically cover.
Key Takeaway
Spend at least half your prep time on the two 16% domains and the three 12% domains - together they represent 68% of the exam content.
Frequently Asked Questions
The City of Chicago Department of Buildings governs the license, while Continental Testing Services administers the written exam itself.
The exam is three hours long and consists entirely of multiple-choice questions, each with one correct answer and three distractors.
You need a score of 70 or higher to pass the CHI-SE written examination.
The current examination fee is $150. After passing, an initial license fee of $75 applies separately.
You must be at least 20 years old, of good character, and have at least two years of practical experience in the management, operation, or construction of steam engines and boilers.
Whether you're just starting to research the license or already scheduling your exam date, understanding the domain weightings, fee structure, and eligibility rules covered here is the foundation for everything else in your preparation. Explore more detail on any of these areas through the linked guides above, or start testing your knowledge directly on our CHI-SE practice test platform.