- Antenna Systems (29%) and Appurtenances (28%) together make up more than half the A&L exam.
- Hazards (22%) is the third-largest domain - heavier than most candidates expect.
- Grounding (9%) is the smallest domain but still tested with drawings and schematics.
- The exam is 70 multiple-choice questions in 120 minutes, delivered via Online Remote Proctoring.
A&L Exam Domain Overview
The National Wireless Safety Alliance (NWSA) built the Antenna and Line Specialty (A&L) exam around five content areas that reflect the actual daily work of a climber who specializes in antenna and line installation. Unlike generic certification exams that spread questions evenly across topics, the A&L exam is deliberately weighted toward the two skill areas that carry the most risk and technical complexity on a tower: Antenna Systems and Appurtenances.
According to the NWSA Candidate Handbook (revision 10/25), the official domain weights are approximate, but the intent is clear - the exam wants to confirm you can work safely and correctly with antennas, mounts, transmission lines, grounding systems, and the hazards that surround all of it. Below is the breakdown you'll be studying against:
| Domain | Approximate Weight | Question Emphasis |
|---|---|---|
| Antenna Systems | 29% | Largest domain |
| Appurtenances | 28% | Second largest |
| Hazards | 22% | Third largest |
| Transmission Lines and Connectors | 12% | Moderate |
| Grounding | 9% | Smallest |
If you haven't yet confirmed you're eligible to sit for this exam, review the full A&L Requirements 2026: Eligibility, Prerequisites & How to Qualify guide first, since TTT-2 certification is a firm prerequisite before NWSA will let you register.
Domain 1: Appurtenances (28%)
Appurtenances covers everything mounted to or attached on a tower structure that isn't the antenna itself - mounts, platforms, ice bridges, cable management hardware, safety climb systems, and the fasteners that hold it all together. Because this domain is nearly as large as Antenna Systems, treating it as an afterthought is one of the most common mistakes candidates make.
Appurtenances
Candidates must understand how appurtenances are selected, installed, inspected, and maintained in accordance with manufacturer specifications and site-specific engineering.
- Mount types and correct hardware torque/installation sequencing
- Platform and standoff arm loading considerations
- Safety climb and fall-protection hardware attached to the structure
- Cable management, ice bridges, and waveguide bridges
- Inspection criteria for corrosion, wear, and improper prior installation
Expect field-scenario style questions here - the handbook notes the exam includes field scenarios, drawings, and schematics, not just definitional recall. You may be shown an installation diagram and asked to identify what's wrong with a mount configuration or hardware sequence.
Domain 2: Antenna Systems (29%)
Antenna Systems is the single largest domain on the A&L exam, and it's the domain most directly tied to the "A" in A&L. This is where candidates are tested on the installation, alignment, and configuration of the antennas themselves, as well as the systems that support their performance.
Antenna Systems
This domain tests practical knowledge of how antennas are mounted, oriented, and integrated into the overall RF system.
- Antenna types and their typical mounting configurations
- Azimuth, tilt, and downtilt adjustment procedures
- RET (remote electrical tilt) systems and associated wiring
- Sector and panel antenna spacing considerations
- Reading and interpreting antenna schematics and site drawings
Key Takeaway
Since Antenna Systems and Appurtenances combined represent well over half the exam, split roughly 55-60% of your total study time between these two domains alone.
Domain 3: Grounding (9%)
Grounding is the smallest domain by weight, but don't mistake "smallest" for "skippable." At roughly 9% of a 70-question exam, you're still looking at several questions built around grounding schematics and drawings - exactly the format the handbook flags as part of the assessment.
Grounding
Candidates need working knowledge of how grounding systems protect equipment and personnel, and how those systems are documented on drawings.
- Grounding conductor sizing and connection points
- Ground bar and ground ring configurations
- Bonding requirements between tower sections and equipment
- Interpreting grounding schematics for a given site
Because this domain carries fewer questions, many candidates using the A&L Cheat Sheet 2026: One-Page Review of Must-Know Facts use it as a fast final-review pass rather than a full week of dedicated study.
Domain 4: Transmission Lines and Connectors (12%)
This domain covers the physical pathway between the antenna and the base station equipment - coax and hybrid cable, connectors, jumpers, and the hardware that keeps transmission lines secure and weatherproofed.
Transmission Lines and Connectors
Expect questions on proper handling, termination, and protection of transmission line systems.
- Cable types and bend radius limitations
- Connector types and proper termination technique
- Weatherproofing and grounding kit application at connection points
- Line sweep and testing basics as they relate to installation quality
At 12%, this domain sits in the middle of the pack - heavier than Grounding, lighter than Hazards. It pairs conceptually with Appurtenances since both deal with hardware installed along the tower structure.
Domain 5: Hazards (22%)
Hazards is the third-largest domain on the exam, and many candidates underestimate it because it feels like "safety review" rather than technical content. At 22%, it's larger than Transmission Lines and Grounding combined.
Hazards
This domain tests awareness of the physical, electrical, and environmental hazards specific to antenna and line work at height.
- RF exposure hazards near energized antennas
- Fall hazards specific to appurtenance and antenna installation work
- Electrical hazards from grounding faults or energized lines
- Weather and environmental hazard recognition on a tower site
Question Format and Exam Mechanics
Understanding the domains only helps if you also understand how they're tested. The A&L exam consists of 70 multiple-choice questions with a 120-minute time limit, which works out to under two minutes per question on average - tight, but workable if you're not stuck decoding unfamiliar drawings during the exam itself.
- Format: Multiple-choice, including field scenarios, drawings, and schematics
- Delivery: Online Remote Proctoring through the NWSA candidate portal, using a live proctor and the Guardian Browser
- Prerequisite: TTT-2 certification must be held before applying
- Scoring: Reported as pass/fail against a criterion-referenced passing standard
- Fee: USD 274 per examination attempt
Applications expire six months after payment, so don't pay and then delay scheduling indefinitely. If you don't pass on the first attempt, NWSA requires a minimum 30-day wait before reapplying, along with payment of the applicable re-examination fee. For a full cost breakdown including these re-exam mechanics, see A&L Certification Cost 2026: Complete Pricing Breakdown.
Certification itself lasts five years, and recertification requires passing the applicable examination during the 12 months before expiration along with meeting current policy requirements - so the domain knowledge you build now has a real shelf life you'll need to refresh later.
Building a Domain-Weighted Study Schedule
Rather than studying all five domains equally, allocate your time proportional to their exam weight. A simple four-week structure built around the domain percentages looks like this:
Antenna Systems (29%)
- Study antenna types, mounting configurations, and tilt/azimuth adjustment
- Practice reading antenna schematics and site drawings
Appurtenances (28%)
- Review mount and platform hardware, fastening sequences
- Study fall-protection and safety climb hardware attached to structures
Hazards (22%) and Transmission Lines and Connectors (12%)
- Cover RF, fall, electrical, and environmental hazard recognition
- Study connector termination and weatherproofing procedures
Grounding (9%) and Full Review
- Study grounding schematics and bonding requirements
- Run full-length practice questions across all five domains
This weighting-first approach is covered in more depth in the A&L Study Guide 2026: How to Pass on Your First Attempt, which walks through pacing strategies for the 120-minute time limit. If you want a broader sense of overall difficulty before committing to a schedule, How Hard Is the A&L Exam? Complete Difficulty Guide 2026 breaks down where candidates tend to struggle by domain.
Once your domain review is solid, running timed practice sets on our A&L practice test platform is the fastest way to confirm which domains still need work before exam day. Because the real exam mixes drawings and field scenarios into straight multiple-choice questions, practicing with that same mixed format on the practice site matters more than passive review alone.
Key Takeaway
Don't wait until the final week to test yourself. Start running domain-specific practice questions on the practice test platform as soon as you finish each week's content so weak spots surface early, not on exam day.
Frequently Asked Questions
Antenna Systems is the largest domain at approximately 29% of the exam, followed closely by Appurtenances at approximately 28%.
No. Hazards makes up approximately 22% of the exam - larger than Grounding and Transmission Lines combined - and includes scenario-based questions specific to antenna and line work at height.
Yes. Telecommunications Tower Technician 2 (TTT-2) certification is a prerequisite required by NWSA before you can register for the A&L exam. See A&L Requirements 2026 for full eligibility details.
Grounding is the smallest domain at approximately 9% of the exam, which on a 70-question test works out to a small handful of questions, though they may still include schematic interpretation.
NWSA requires candidates to wait at least 30 days after a failed attempt before reapplying, and you'll need to pay the applicable re-examination fee. Review your domain performance closely before rescheduling.