Excavation Techniques & Site Management Flashcards
7 cards from real MEOC practice questions. Tap to flip, then mark Knew It or Still Learning โ missed cards come back until you master them.
Read the first 7 Excavation Techniques & Site Management flashcards as text
What is the purpose of a 'catch berm' installed downhill from an active excavation?
Answer: To prevent runoff and eroded material from leaving the site
Catch berms trap sediment-laden runoff, preventing erosion discharge from the site as required by stormwater regulations.
When excavating in Type C soil, OSHA requires the maximum allowable slope for a simple slope excavation greater than 20 feet deep to be:
Answer: 1.5:1 (H:V)
OSHA mandates a 1.5:1 horizontal-to-vertical slope ratio for Type C soil in simple slope excavations exceeding 20 feet.
During site grading, you need to match an existing grade at a property line. What is the best technique?
Answer: Use a laser level or grade rod to continuously verify elevation as you work
Continuous verification with a laser level or grade rod ensures accurate grade matching throughout the operation.
What is 'cut to fill' balancing on a grading project?
Answer: Calculating excavated material volume to match the volume needed for embankment fill
Cut-to-fill balancing minimizes hauling costs by using on-site excavated material to fill low areas to design grade.
A dewatering pump fails during a deep excavation and water begins rising in the trench. What is the priority action?
Answer: Evacuate all personnel from the trench immediately
Rising water in a trench is an immediate life safety hazard; all workers must evacuate before any equipment action is taken.
What does a 'benchmark' serve as in excavation site management?
Answer: A fixed reference point of known elevation used to establish all other grades on site
A benchmark is a permanent, known-elevation reference point from which all site elevation measurements are derived.
When excavating over a buried fuel storage tank area, what additional precaution must be taken?
Answer: Test for vapor concentration before and during excavation in the area
Fuel vapors from leaking or residual product in buried tanks can accumulate and ignite; atmospheric testing is mandatory before and during work.