CTQP Structures Inspection 4

Question 1

During a CTQP structures inspection, which condition in a concrete bridge deck most directly indicates alkali-silica reaction (ASR)?

Accepted Answer

Map or pattern cracking with a gel-like exudate

Answer

ASR produces characteristic map (crazing) cracking accompanied by a white or clear gel exudate at crack faces.

Question 2

When inspecting a prestressed concrete beam, a rust stain running perpendicular to the beam axis most likely indicates:

Accepted Answer

Corrosion of prestressing strand

Answer

Rust stains perpendicular to the beam axis align with the location of prestressing strands, suggesting strand corrosion.

Question 3

Under FDOT CTQP guidelines, what is the minimum required frequency for routine in-depth inspections of highway bridges?

Accepted Answer

Every two years

Answer

Federal regulations and FDOT guidelines require routine in-depth bridge inspections at a maximum interval of 24 months (every two years).

Question 4

An inspector notices that a steel girder's bottom flange has a crack initiating from a weld toe and propagating into the flange. This is best classified as:

Accepted Answer

Fatigue cracking

Answer

Cracks originating at weld toes and growing under cyclic traffic loading are the classic signature of fatigue cracking in steel bridge members.

Question 5

Which instrument is most appropriate for measuring the depth of a surface crack in a concrete bridge component during a field inspection?

Accepted Answer

Ultrasonic pulse velocity (UPV) device

Answer

A UPV device can estimate crack depth by comparing pulse travel time through cracked versus uncracked paths.

CTQP - Construction Training & Qualification Program Practice Test

CTQP - Construction Training & Qualification Program Practice Test

CTQP Structures Inspection 4