CTQP Earthwork Construction Inspection 2

Question 1

What piece of equipment is commonly used to compact cohesive soils in earthwork operations?

Accepted Answer

Sheepsfoot or padfoot roller

Answer

Sheepsfoot and padfoot rollers are most effective for compacting cohesive (clay) soils because their feet penetrate and knead the soil.

Question 2

What is the purpose of a subgrade proof roll in earthwork inspection?

Accepted Answer

To identify soft or unstable areas in the prepared subgrade

Answer

A proof roll uses a heavily loaded tandem-axle dump truck driven across the subgrade to identify soft, pumping, or unstable areas that need remediation.

Question 3

What is 'muck excavation' as defined under FDOT pay items?

Accepted Answer

Excavation and removal of organic, unsuitable material

Answer

Muck excavation is the removal of organic or otherwise unsuitable material from below the ground surface, typically replaced with suitable fill.

Question 4

When inspecting a fill slope, what ratio does '3:1' indicate?

Accepted Answer

1 foot vertical for every 3 feet horizontal

Answer

A 3:1 slope means 3 feet horizontal for every 1 foot vertical, and is a common slope for embankment side slopes in FDOT projects.

Question 5

Which soil classification system is most commonly referenced in FDOT earthwork specifications?

Accepted Answer

AASHTO Soil Classification System

Answer

FDOT references the AASHTO soil classification system, which groups soils A-1 through A-7 based on gradation and Atterberg limits.

CTQP - Construction Training & Qualification Program Practice Test

CTQP - Construction Training & Qualification Program Practice Test

CTQP Earthwork Construction Inspection 2