Structures Inspection Flashcards
7 cards from real CTQP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Structures Inspection flashcards as text
During a CTQP structures inspection, which condition in a concrete bridge deck most directly indicates alkali-silica reaction (ASR)?
Answer: Map or pattern cracking with a gel-like exudate
ASR produces characteristic map (crazing) cracking accompanied by a white or clear gel exudate at crack faces.
When inspecting a prestressed concrete beam, a rust stain running perpendicular to the beam axis most likely indicates:
Answer: Corrosion of prestressing strand
Rust stains perpendicular to the beam axis align with the location of prestressing strands, suggesting strand corrosion.
Under FDOT CTQP guidelines, what is the minimum required frequency for routine in-depth inspections of highway bridges?
Answer: Every two years
Federal regulations and FDOT guidelines require routine in-depth bridge inspections at a maximum interval of 24 months (every two years).
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:
Answer: Fatigue cracking
Cracks originating at weld toes and growing under cyclic traffic loading are the classic signature of fatigue cracking in steel bridge members.
Which instrument is most appropriate for measuring the depth of a surface crack in a concrete bridge component during a field inspection?
Answer: Ultrasonic pulse velocity (UPV) device
A UPV device can estimate crack depth by comparing pulse travel time through cracked versus uncracked paths.
During scour inspection of a bridge pier after a flood event, the inspector should FIRST:
Answer: Probe the streambed adjacent to the footing with a rod
Probing with a rod directly determines whether the footing or pile cap is exposed or undermined, providing the most immediate safety-critical data.
A bridge bearing that exhibits 'frozen' condition (no movement despite temperature changes) is most likely to cause which secondary defect?
Answer: Unintended longitudinal forces transferred to the substructure
A frozen bearing prevents thermal expansion, transferring large unintended horizontal forces to piers or abutments, potentially causing cracking or tilting.