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TTT-1 Structures Practice Test
10 questions · 15% of the real TTT-1 exam · instant scoring · explanations cite the standard
Structures is 15% of TTT-1: tower types, what each member does, what a climber inspects on the way up, and why every added appurtenance goes back to a TIA-222 analysis. Ten questions with explanations.
This is one domain. The full free TTT-1 practice test covers all five, weighted like the exam. The TTT-1 Pro course drills every domain with full-length timed exams and a weak-area report.
Get TTT-1 Pro — $3910 structures questions
A self-supporting lattice tower stays upright because of:
Show answer and explanation
Correct answer: B. Self-supporters use a wide base and cross-braced legs to resist overturning. Guyed towers use guy wires; monopoles are single tapered shafts.
A monopole is:
Show answer and explanation
Correct answer: B. Monopoles have the smallest footprint and usually use step bolts or an internal climb. Flange bolts at section joints are inspection points.
The structural standard that governs tower design, analysis and modification is:
Show answer and explanation
Correct answer: B. TIA-222 (current edition Revision I, effective January 1, 2024) is the structural standard. A10.48 governs construction and maintenance safety; B30.26 is rigging hardware.
Tower leg members primarily carry:
Show answer and explanation
Correct answer: B. Legs are the main compression/tension members. Diagonals handle shear and torsion from wind.
Step bolts on a monopole are:
Show answer and explanation
Correct answer: B. Step bolts are climbing hardware. Fall arrest uses the safety-climb system or certified anchors; rigging never hangs from step bolts.
Guy anchors at the ground should be checked for:
Show answer and explanation
Correct answer: B. Below-grade corrosion at the anchor rod is a classic failure point. Anchor condition is part of the pre-climb site look, not just the formal inspection.
Section joints on a monopole (flange or slip joints) are inspected for:
Show answer and explanation
Correct answer: B. Flange bolts carry the full moment of the structure. Missing or loose bolts at a joint are a stop-and-report condition.
A tower's climbing facility (ladder or step bolts) with a missing rung or bolt should be:
Show answer and explanation
Correct answer: B. A gap breaks three-point contact and may indicate corrosion at the attachment. It is a stop condition, not an inconvenience.
Appurtenances add load to a tower primarily through:
Show answer and explanation
Correct answer: B. Wind on the projected area creates the governing load for most towers, with ice adding both weight and area. That is why every addition goes through TIA-222 analysis.
Climbing a tower immediately after a lightning storm or ice event is:
Show answer and explanation
Correct answer: B. Lightning can damage members, bolts and the climbing system; ice shedding is a falling-object hazard. Post-event inspection comes before routine work.
Other TTT-1 domains
- Fall protection climber-rescuer — 30% of TTT-1
- Hoisting & rigging — 20% of TTT-1
- Planning & job logistics — 15% of TTT-1
- Appurtenance installation — 20% of TTT-1
- Full TTT-1 practice test — all domains
Frequently asked questions
How much of the NWSA TTT-1 exam is structures?
15%, per the Candidate Handbook REV 10/25 content outline. The full TTT-1 exam is 85 questions · 90 minutes.
Is the NWSA exam computer-based?
Yes. Since January 2024 every NWSA certification exam is delivered by Online Remote Proctoring (ORP) — you take it on your own computer with a live proctor. The practical exam component was discontinued at the same time.
What score do I need to pass the NWSA exam?
NWSA does not publish a passing score. Exams are criterion-referenced and the cut score is set by a panel of subject-matter experts; results are reported as pass/fail with a domain-by-domain breakdown. Any site quoting a specific percentage is guessing.
How much does the NWSA exam cost?
$274 for every NWSA certification — TTT-1, TTT-2, A&L, Foreman and ARC. Retakes are the same $274, with a 30-day wait between attempts. Fees are set by NWSA and can change; nws-a.org is the authority.
Exam facts on this page are from the NWSA Candidate Handbook, CH REV 10/25. Fees, formats and rules change — the handbook is the authority. NWSA Study Guide is independent and is not affiliated with, endorsed by, or recognized by the National Wireless Safety Alliance.