CEI Exam Domains 2026: Complete Guide to All 11 Content Areas

How the CEI Exam Blueprint Is Built

The Certified Elevator Inspector (CEI) credential is administered through the Qualified Elevator Inspector Training Fund (QEITF) and its Certification Council. Unlike many certification exams organized around abstract knowledge categories, this one is organized around physical locations and equipment types. An inspector's job is to walk into a space, look at what is there, and decide whether it complies. The blueprint mirrors that reality with 11 domains named after the places and equipment an inspector actually examines.

That structure matters for how you study. You are not memorizing definitions; you are building the mental habit of standing in a machine room, a pit, or on top of a car and asking: what does the code require here, where is it written, and is this a violation? If you are still getting oriented on the credential itself, our overview of what CEI certification is covers the basics before you dive into the domain-level detail below.

The 11 domains, with their published weights, are:

1. Inside of Car (17%)
2. Machine Room (19%)
3. Top of Car - Electric (8%)
4. Top of Car - Hydraulic (6%)
5. Elevator Pit (14%)
6. Outside Hoistway (8%)
7. Firefighter's Service (10%)
8. Escalators (external) (6.5%)
9. Escalators (internal) (3.5%)
10. Moving walks (external) (5%)
11. Moving walks (internal) (3%)

Format: Open-Codebook, Three-Part Scenarios

The April 10, 2026 QEITF handbook specifies an in-person, computer-administered, open-codebook assessment lasting 8 hours, including a meal break after 4 hours. Calculators and personal electronic devices are prohibited. QEITF supplies the current codebook list when candidates register for class, so confirm your editions at that point rather than relying on older copies from a prior job.

The defining feature of the exam is its scoring structure. Each scenario requires the candidate to identify three things:

• The codebook that governs the situation
• The code reference (the specific requirement within that book)
• The violation decision (is the condition compliant or not)

All three responses must be correct for item credit. There is no partial credit for getting the violation call right but citing the wrong section. This is the single most important fact about the exam's style, and it changes how you should use the open-book privilege.

Passing is determined using an Angoff-established standard, which means a panel of subject-matter experts set the cut score based on the judged difficulty of the items rather than a fixed percentage. For more on what that means in practice, see our breakdown of the CEI passing score, and for a sense of how demanding the exam feels in practice, read how hard the CEI exam is.

The Three Heavyweight Domains

Machine Room, Inside of Car, and Elevator Pit together account for 50% of the exam (19% + 17% + 14%). Half the test lives in three spaces. If you are short on prep time, this is where marginal hours pay off most.

Domain 2: Machine Room (19%)

Machine Room is the largest single domain. It is where drive machines, controllers, governors, disconnects, and supporting electrical equipment live, which means it draws on both mechanical and electrical code knowledge in a single space.

Because this domain straddles codebooks, it is the domain where the "which book?" part of the three-part answer causes the most errors. Practice deciding up front whether a condition is an elevator code matter or something governed elsewhere.

Domain 1: Inside of Car (17%)

Inside of Car is what passengers experience, and it is heavy on safety-critical user-facing equipment.

Domain 5: Elevator Pit (14%)

The pit is the bottom of the hoistway and a classic source of inspection findings. Candidates need to think about both equipment condition and the safety of the person working down there.

If you want a condensed view of the highest-yield facts across these three, our CEI cheat sheet is a good companion for last-pass review.

Top of Car, Outside Hoistway, and Firefighter's Service

Domains 3 and 4: Top of Car (Electric 8%, Hydraulic 6%)

The blueprint splits Top of Car by drive type, and the split is deliberate. Electric (traction) and hydraulic elevators present different equipment on the car top and different hazards. Together these two domains represent 14% of the exam, equal to the pit.

• Electric: expect topics tied to car-top inspection stations, working-area protection, and traction-specific equipment found above the car.
• Hydraulic: expect plunger and cylinder related conditions, and the equipment and clearance issues unique to hydraulic installations.

A common trap is carrying an electric-elevator assumption into a hydraulic scenario. Read the scenario's drive type before you reach for a code reference.

Domain 6: Outside Hoistway (8%)

Outside Hoistway covers what an inspector evaluates from the landing and building side: hoistway entrances, doors, and the interface between the elevator and the building at each floor. These items are visible to the public, so they tend to be well represented in real-world inspection findings.

Domain 7: Firefighter's Service (10%)

At 10%, Firefighter's Service is the fourth-largest domain and one of the most procedural. It covers the emergency recall and in-car emergency operation features that let fire personnel take control of elevators during an incident.

Escalators and Moving Walks: Four Small Domains

The blueprint devotes four domains to escalators and moving walks, split into external and internal views of each:

• Escalators (external): 6.5%
• Escalators (internal): 3.5%
• Moving walks (external): 5%
• Moving walks (internal): 3%

Combined, that is 18% of the exam, more than the Machine Room alone. Candidates with a pure elevator background routinely underinvest here because each individual domain looks small. That is a mistake.

Escalators and moving walks share much of their vocabulary and many code concepts, so study them side by side. Learn the escalator rule first, then ask how it differs for a moving walk. That comparison approach is more efficient than treating them as four separate topics, and it helps you catch the cases where the requirement differs.

All 11 Domains at a Glance

The weights sum to 100%. A useful way to read the table: the top four rows cover 60% of the exam, while the bottom five rows (the escalator and moving walk domains plus hydraulic car top) cover roughly 24%. For deeper background on how these weights fit into a broader preparation plan, our CEI study guide walks through the full approach.

Sequencing Your Prep by Domain

Because the exam rewards navigation speed and precise code citation, the order in which you tackle domains matters more than the total hours. The sequence below ties each week to a domain cluster and explains why.

When you review misses, categorize each one: wrong book, wrong reference, or wrong violation call. That diagnosis tells you whether your gap is navigation, code knowledge, or judgment, and each needs a different fix. You can test yourself against realistic scenarios on the CEI practice test site.

Fees, Eligibility, and Registration Mechanics

Domain knowledge is only half of the picture; you also have to get through the front door. Applications run through the Prolydian portal, and the $25 application payment is credited toward the exam price.

The handbook defines discounted eligibility as benefit-eligible IUEC members outside self-pay, IUEC retirees, and qualifying signatory employers. Required codebooks are purchased separately, and QEITF estimates that cost at approximately $1,500, so budget for it alongside the exam or package fee. The full financial picture is laid out in our CEI certification cost breakdown.

Prerequisites include a high-school diploma or GED; 5 years of supervised elevator-trade experience, including an 8,000-hour national apprenticeship and one post-apprenticeship year; passing the NEIEP Mechanic examination or equivalent; relevant current-code training; and an ethics attestation. QEITF training is optional as the training provider, although qualifying code training is required. Our guide to CEI requirements and eligibility covers each prerequisite in more depth, and CEI exam dates and scheduling explains how to plan around testing availability.

After You Pass: The 12-Month Cycle

CEI certification lasts 12 months, so maintenance is a recurring annual task rather than a one-time milestone. Annual renewal requires:

• 1.0 CEU
• The maintenance examination
• An ethics attestation
• The renewal fee ($100 for the eligible IUEC category, $200 for others)

For QEITF CEI holders, the maintenance examination earns 0.2 CEU, which can combine with an approved 0.8-CEU class to reach the 1.0 CEU requirement. Plan your continuing education early in the year so renewal does not become a scramble.

If you are weighing whether the investment pays off, see our analyses of whether the CEI certification is worth it and the CEI salary guide.

Frequently Asked Questions

Understanding the weight and content of every domain is the foundation of an efficient preparation plan. When you are ready to test your recall under realistic conditions, head to the CEI exam prep practice tests and start working scenarios domain by domain.