CPI CPI Site Preparation & Layout Planning 2 — Questions and Answers
Question 1: What is the primary purpose of a soil compaction test (Proctor test) on a job site?
- To determine the soil's chemical composition
- To verify that fill material has been compacted to the specified density (Correct answer)
- To check soil pH for landscaping purposes
- To measure the bearing capacity of rock formations
Correct answer: To verify that fill material has been compacted to the specified density
The Proctor compaction test compares the field dry density of compacted fill to the lab-determined maximum dry density, expressed as a percent compaction required by specifications.
Question 2: What does the 'setback' requirement on a site plan specify?
- The minimum distance a structure must be from property lines (Correct answer)
- The required depth of foundation below frost line
- The distance between the meter base and main panel
- The slope of the driveway from street to garage
Correct answer: The minimum distance a structure must be from property lines
Setback requirements establish the minimum allowable distance between a structure and property lines, streets, or easements, as defined by local zoning ordinances.
Question 3: Which surveying instrument is most commonly used to establish level reference lines across a job site?
- Builder's level (dumpy level) or automatic level (Correct answer)
- Plumb bob only
- Standard carpenter's level
- Digital multimeter
Correct answer: Builder's level (dumpy level) or automatic level
A builder's level (optical or automatic self-leveling level) projects a horizontal plane of reference across a site, allowing accurate elevation measurements over long distances.
Question 4: What is 'cut and fill' balancing in site grading?
- Matching the volume of excavated soil to the volume needed for filling low areas on the same site (Correct answer)
- Cutting lumber to fill gaps in framing
- Balancing the electrical panel by distributing loads equally
- Filling pipe cuts with joint compound
Correct answer: Matching the volume of excavated soil to the volume needed for filling low areas on the same site
Cut and fill balancing aims to equalize the volume of soil excavated from high areas with the volume needed to raise low areas, minimizing costly off-site hauling or import of fill material.
Question 5: Before beginning interior work, what should an installer verify about the building's rough-in dimensions?
- That the architect's fee has been paid
- That actual field measurements match the approved drawings within acceptable tolerances (Correct answer)
- That the owner's furniture has been moved out
- That all exterior painting is complete
Correct answer: That actual field measurements match the approved drawings within acceptable tolerances
Verifying that field conditions match drawing dimensions before ordering or cutting materials prevents costly errors, as built structures often have minor deviations from designed dimensions.
Question 6: What is the purpose of a temporary erosion control measure such as a silt fence on a construction site?
- To mark the boundary of the work zone for OSHA compliance
- To prevent sediment-laden runoff from leaving the disturbed site area (Correct answer)
- To redirect rainwater into foundation drain systems
- To protect stored materials from wind damage
Correct answer: To prevent sediment-laden runoff from leaving the disturbed site area
Silt fences are installed downslope of disturbed areas to intercept and slow sheet flow runoff, allowing sediment to settle out before water leaves the site, as required by stormwater pollution prevention plans.
CPI CPI Site Preparation & Layout Planning 2
What is the primary purpose of a soil compaction test (Proctor test) on a job site?