FREE NWSA Tower Structures and Inspection Questions and Answers

Question 1

According to the ANSI/TIA-222-H standard, what is the maximum recommended inspection interval for a guyed mast tower under normal environmental conditions?

Accepted Answer

Every 3 years

Answer

The ANSI/TIA-222-H standard specifies that guyed masts should be inspected at intervals of every three years, while self-supporting structures have a longer interval of five years under normal conditions.

Question 2

During an inspection of a monopole, a technician ensures the small opening at the base of each slip joint is clear of debris. What is the primary purpose of this component, known as a weep hole?

Accepted Answer

To permit the drainage of internal condensation and moisture.

Answer

Weep holes are designed to allow any moisture that accumulates inside the hollow sections of a monopole to drain out. This prevents the buildup of water which can lead to internal corrosion and damage from freeze/thaw cycles.

Question 3

An inspector finds severe, localized corrosion where a stainless steel bracket is bolted directly to a galvanized steel tower leg. Which of the following best describes this type of corrosion?

Accepted Answer

Galvanic corrosion

Answer

Galvanic corrosion occurs when two dissimilar metals (like stainless steel and zinc-coated galvanized steel) are in electrical contact in the presence of an electrolyte (like moisture). The less noble metal (zinc) corrodes at an accelerated rate to protect the more noble metal (stainless steel).

Question 4

While performing a hands-on inspection of a guy wire, a technician discovers two broken wires within a single strand lay length. What is the generally accepted course of action according to industry standards?

Accepted Answer

Immediately report the condition for engineering review and likely replacement.

Answer

Most standards and best practices for wire rope and guy strand inspection state that finding two or more broken wires in one lay length is cause for immediate removal from service or replacement. This condition significantly compromises the strength and safety of the guy wire.

Question 5

Which of the following findings during a visual inspection of a concrete tower foundation would require the most urgent attention and a formal structural engineering assessment?

Accepted Answer

A large, vertical crack that runs through a pier and shows signs of displacement.

Answer

While minor cracks and cosmetic issues are common, a large structural crack with displacement (meaning the concrete on either side of the crack is no longer aligned) indicates significant movement and a potential failure of the foundation's integrity. This condition requires immediate engineering evaluation.

NWSA - National Wireless Safety Alliance Practice Test

NWSA - National Wireless Safety Alliance Practice Test

FREE NWSA Tower Structures and Inspection Questions and Answers