- The Number: 70% on a 50-Question Exam
- The Scoring Math, Question by Question
- Why Open Book Does Not Mean Easy
- How the Four Domains Build Your Score
- The Rolling Question Pool and What It Means for Preparation
- Fees, Retests, and the Cost of Missing 70%
- Qualifying to Sit for the Exam
- A Domain-Ordered Plan for Reaching 70%
- After You Pass: Five Years of Certification
- Frequently Asked Questions
- The Society of Broadcast Engineers (SBE) sets the CBTE passing score at 70%.
- The exam has 50 multiple-choice questions worth two points each, so you need 35 correct answers.
- You get three hours, and reference books, notes, calculators, and internet references are permitted under SBE proctoring rules.
- Your first exam costs $88 for SBE members, $193 for non-members, or $303 for Non-Member Plus; a retest costs $46.
The Number: 70% on a 50-Question Exam
The passing score for the Certified Broadcast Television Engineer (CBTE) exam is 70%. The credential is awarded by the Society of Broadcast Engineers, Inc. (SBE), and the exam is administered through SBE-approved proctors and local chapters. If you have been searching for a trick, a curve, or a scaled-score conversion, there is nothing like that to decode here. The threshold is a plain percentage of the points available.
That simplicity is useful, because it lets you plan backward from a concrete target. This article breaks down exactly what 70% means in practice: how many questions you can miss, how the open-book format changes the math, how the four official subject headings feed into your result, and what happens financially and professionally if you fall short or succeed. If you are still deciding whether to pursue the credential at all, start with What Is CBTE Certification? and then come back to the numbers.
The Scoring Math, Question by Question
The exam consists of 50 multiple-choice questions, each worth two points. That makes 100 points total, which is why the percentage maps so cleanly onto raw points.
| Element | CBTE Exam Detail |
|---|---|
| Question count | 50 multiple-choice questions |
| Value per question | 2 points |
| Total points | 100 |
| Passing score | 70% |
| Minimum correct answers | 35 of 50 |
| Maximum you can miss | 15 questions |
| Time limit | 3 hours |
Thirty-five correct answers earn exactly 70 points, which meets the standard. Thirty-four correct gives you 68 points, which does not. There is no partial credit within a question, so every item is binary: right or wrong.
What the time limit does to your pacing
Three hours for 50 questions averages out to roughly three and a half minutes per question. That is generous for a recall-style exam, but the CBTE is not purely recall. Some items require working through a calculation or looking up a specification, and those eat time quickly. A sensible approach is to answer every question you know cold in a first pass, flag the calculation-heavy ones, and return to them with your calculator and references once the easy points are banked. Because there is no indication that wrong answers carry a penalty beyond the lost points, leaving an item blank gains you nothing; make your best-supported choice on everything.
Why Open Book Does Not Mean Easy
Under SBE proctoring rules, reference books, notes, calculators, and internet references are all permitted during the exam. New candidates sometimes read that and assume 70% is a formality. It is not, for three reasons.
- Lookup speed is a skill. If you do not already know roughly where a concept lives in your references, you can burn ten minutes confirming a single answer. Across 15 or 20 uncertain questions, that is your whole time budget.
- Questions test application, not definitions. A reference book can give you a formula, but it cannot tell you which formula the scenario calls for or what a sensible result looks like. Candidates who lean entirely on lookup tend to pick plausible-but-wrong answers.
- The exam is aimed at working engineers. It presumes the five years of applicable experience that eligibility requires, and the questions reflect the judgment of someone who has actually maintained a facility.
For a candid look at how candidates experience the difficulty, see How Hard Is the CBTE Exam? Complete Difficulty Guide 2026. For what the available data does and does not say about outcomes, read CBTE Pass Rate 2026: What the Data Shows.
How the Four Domains Build Your Score
SBE lists four broad subject headings for the CBTE. These are official categories, not separately scored sections with their own cut lines. You do not need to hit 70% in each one; you need 70% overall. That said, a weak domain can sink the total if you let it, so it helps to understand what each one asks of you. For a fuller walkthrough, see CBTE Exam Domains 2026: Complete Guide to All 4 Content Areas.
Domain 1: Safety
Broadcast facilities combine high voltage, RF energy, tower work, and heavy equipment. Safety questions reward candidates who have internalized good practice rather than memorized it.
- Electrical hazards around transmitters and power distribution
- RF exposure awareness and protective practices
- Tower and rooftop work precautions
- Lockout and equipment-handling discipline
Domain 2: Problems: Electronic and Practical
This is where calculators and references see the most use. Expect scenarios that ask you to work through a circuit, signal, or facility problem and arrive at a numerical or diagnostic answer.
- Applying Ohm's law and power relationships to real equipment situations
- Signal level, gain, and loss calculations
- Troubleshooting logic for failures you would meet on the job
- Unit handling, since a correct method with a dropped decade still yields a wrong answer
Domain 3: Operating Practices
Operating practices reflect how a television facility is actually run and kept compliant. Experienced engineers often find these questions comfortable, but regulatory and procedural details still reward a deliberate review.
- Station operation and maintenance routines
- Regulatory obligations that affect day-to-day engineering
- Documentation, logging, and measurement practices
Domain 4: Theory
Theory covers the underlying principles of television systems and the electronics beneath them. Strong fundamentals here make the Problems domain faster as well, since the same concepts show up in both.
- Core electronics and RF principles
- Fundamentals of video and television signal behavior
- Transmission and distribution concepts
Because the domains are headings rather than weighted sections with published percentages, avoid planning around an assumed split. Instead, treat each as a place where you might lose points and probe your own weak spots with practice questions.
The Rolling Question Pool and What It Means for Preparation
SBE maintains a rolling question pool. In practical terms, the specific 50 questions you see are drawn from a larger bank that changes over time, so you cannot prepare by hunting for a remembered set of items. What you can do is prepare against the breadth of the four subject headings.
SBE also offers an optional CertPreview for $45. Its categories are a useful way to see topic coverage beyond the four broad headings, and it gives you a feel for the question style before you commit exam fees. Treat CertPreview categories as supplementary coverage maps, not as extra weighted domains on the real exam. Pair it with the approach in CBTE Study Guide 2026: How to Pass on Your First Attempt, and use a CBTE practice test to rehearse the format under realistic time pressure.
Fees, Retests, and the Cost of Missing 70%
The passing score has a direct financial side, because a miss means paying again. The published exam fees are below.
| Item | Published Fee (USD) |
|---|---|
| Exam, SBE member | $88 |
| Exam, non-member | $193 |
| Exam, Non-Member Plus | $303 |
| Retest | $46 |
| Optional SBE CertPreview | $45 |
Notice the gap between member and non-member pricing. For many candidates the arithmetic favors joining SBE before applying, but compare the current membership dues against the savings for your situation before deciding. The retest fee of $46 is far lower than a first attempt for non-members, which softens the sting of a near miss. For the full picture, including what falls outside exam fees, see CBTE Certification Cost 2026: Complete Pricing Breakdown.
Key Takeaway
If you are weighing the $45 CertPreview against the $46 retest fee, the preview is the cheaper way to find your weak domain. A focused diagnostic before the real attempt can prevent the retest entirely.
Qualifying to Sit for the Exam
You cannot simply book a seat and attempt to reach 70%; SBE reviews your application first. Eligibility requires five years of applicable experience. Qualifying engineering degrees, related technical education, or a Professional Engineer license can substitute for part of that experience, within limits SBE sets. The application asks for three references, including at least one person who supervised you, and transcripts if you are claiming education credit.
Gather these early, because reference collection tends to take longer than candidates expect. The details are covered in CBTE Requirements 2026: Eligibility, Prerequisites & How to Qualify, and scheduling mechanics are in CBTE Exam Dates 2026: Testing Windows, Deadlines & Scheduling. Since exams run through SBE-approved proctors and local chapters, your chapter is often the quickest way to learn what sessions are available near you.
A Domain-Ordered Plan for Reaching 70%
Generic study advice is easy to find; what matters here is ordering the work around the structure of this particular exam. The idea is to bank the points you can secure cheaply, then spend your hardest effort where open-book lookup helps least. Pace it to your own timeline, but the sequence below works for most candidates.
Theory first
- Rebuild fundamentals in Domain 4 so later calculations make sense
- Build your index of reference materials as you go
Problems: Electronic and Practical
- Work calculation problems by hand with your calculator, timing yourself
- Log every unit or decade error; these are the cheapest points to recover
Safety and Operating Practices
- Review regulatory and procedural details you rely on from memory
- Reinforce safety principles, which tend to be answerable by sound judgment
Full-length rehearsal
- Sit a timed 50-question practice run with only the references you will bring
- Aim to finish a first pass well inside the three hours and leave time to revisit flagged items
When your practice scores consistently clear 35 correct out of 50 with comfortable time left, you have a margin rather than a coin flip. Aim for a cushion above the minimum, since test-day nerves and unfamiliar phrasing will cost you a few points. For a compact last-day review, the CBTE Cheat Sheet 2026: One-Page Review of Must-Know Facts is a handy companion.
After You Pass: Five Years of Certification
Reaching 70% earns a certification that lasts five years. To keep it, you renew either by earning 20 SBE professional credits drawn from at least four categories or by retaking the exam before expiration. Starting to log qualifying activity early makes the credit route far easier than scrambling in year five.
The credential matters most for engineers working in or around television broadcasting: station and group engineering departments, network operations, and facilities that value a recognized peer standard for technical competence. To see how the credential connects to opportunities and pay, explore CBTE Jobs, the CBTE Salary Guide 2026: Complete Earnings Analysis, and Is the CBTE Certification Worth It? Complete ROI Analysis 2026. When you are ready to test yourself against realistic questions, start at the CBTE practice test home page.
Frequently Asked Questions
The passing score is 70%. The exam has 50 multiple-choice questions worth two points each, so you need 35 correct answers to earn the 70 points required to pass.
You can miss up to 15 of the 50 questions. Missing 16 leaves you with 34 correct answers, or 68 points, which falls short of the 70% standard.
No. Domains are the official broad subject headings (Safety; Problems: Electronic and Practical; Operating Practices; Theory), but the 70% standard applies to your overall exam result. A strong showing in some areas can offset weakness in others, though you should not rely on that.
Yes, under SBE proctoring rules you may use reference books, notes, calculators, and internet references. The three-hour limit still applies, so your references should confirm what you mostly know rather than teach you topics from scratch.
You can retest for a published fee of $46. Use the experience to identify which subject heading cost you the most points, and consider the optional $45 SBE CertPreview to target your weak areas before the next attempt.