CTQP Structures Inspection

Question 1

What does 'form stripping time' or 'form removal time' mean in concrete bridge construction?

Accepted Answer

The minimum time after concrete placement that forms can be removed based on concrete strength

Answer

Form stripping time is the minimum elapsed time after concrete is placed (or minimum concrete strength achieved) before forms can be safely removed without damaging the concrete.

Question 2

What is 'falsework' in bridge construction?

Accepted Answer

Temporary supporting structure that supports permanent structure elements during construction until they are self-supporting

Answer

Falsework is the temporary support structure (typically steel or timber framing) used to hold bridge girders, decks, or arches in position until the permanent structure can support its own load.

Question 3

What is the purpose of 'expansion joints' in a bridge structure?

Accepted Answer

To allow for thermal movement and prevent damage from temperature-induced expansion and contraction

Answer

Expansion joints accommodate thermal expansion and contraction, seismic movement, and long-term creep and shrinkage, preventing structural damage and cracking in the bridge.

Question 4

What is 'post-tensioning' in prestressed concrete bridge construction?

Accepted Answer

Applying tension to steel tendons after the concrete has hardened to place the concrete in compression

Answer

Post-tensioning involves threading high-strength steel tendons through ducts cast into the concrete, then tensioning the tendons after the concrete has hardened to induce compressive prestress.

Question 5

What document must an inspector verify is current and on-site before allowing any concrete pour on a bridge structure?

Accepted Answer

The approved mix design and current concrete plant certification

Answer

The inspector must verify that the concrete mix design is approved by FDOT and that the batch plant holds a current certification before allowing any structural concrete to be placed.

CTQP - Construction Training & Qualification Program Practice Test

CTQP - Construction Training & Qualification Program Practice Test

CTQP Structures Inspection