Site Work and Concrete Flashcards
7 cards from real General Contractor License practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Site Work and Concrete flashcards as text
What is the purpose of control joints in a concrete slab?
Answer: To create planes of weakness that control cracking location
Control joints are tooled or sawn grooves that create intentional weak planes so that shrinkage cracks occur at planned locations.
Soil classified as Type C under OSHA excavation standards is:
Answer: Granular or fissured soil with the highest risk of collapse
Type C is the least stable soil category under OSHA, including granular, fissured, or previously disturbed soils with the greatest collapse risk.
The 'angle of repose' for soil refers to:
Answer: The maximum slope at which soil will remain stable without support
The angle of repose is the steepest slope at which a particular soil type will naturally stand without sliding or collapsing.
Fly ash is commonly used as a partial replacement for Portland cement because it:
Answer: Improves workability and long-term strength while reducing cost
Fly ash is a pozzolan that improves workability, reduces heat of hydration, enhances long-term strength, and lowers material costs.
What does 'dewatering' mean in the context of excavation work?
Answer: Removing groundwater from an excavation to keep it dry for construction
Dewatering is the process of pumping or draining groundwater from an excavation to create safe, workable dry conditions.
Which of the following is true about isolation joints in concrete construction?
Answer: They allow independent movement between adjacent concrete elements
Isolation joints completely separate adjacent concrete elements with a compressible filler to allow differential movement without cracking.
A proctor test is used to determine:
Answer: Optimum moisture content for maximum soil compaction
The Proctor compaction test establishes the optimum moisture content at which a specific soil achieves its maximum dry density.