Louisiana Contractor Earthwork, Drainage, and Levees Trade Examination Practice Test
Earthwork, drainage, and levee construction requires control of soil, water, and ground conditions throughout site preparation and embankment work. This practice material samples estimating under uncertainty, managing runoff, selecting borrow material, shaping drainage channels, and responding to field conditions such as inadequate compaction or unstable soil.
Exam overview
About the Louisiana Contractor Earthwork, Drainage, and Levees Trade Examination Exam
Relevant field decisions include preparing an existing slope for an embankment tie-in, evaluating borrow soil for its intended fill zone, and responding when density tests show a compacted lift below specification. Drainage work calls for understanding channel cross-sectional area, flow velocity, sediment-basin features, and the information used to select riprap for bank protection. Levee construction also involves managing pore-water pressure and evaluating changes around relief wells. Planning for forecast rain can reduce erosion and damage before exposed soil is stabilized. Cost estimates may need to communicate uncertainty from fuel prices and weather delays. Together, these topics connect earthwork methods with drainage performance, soil behavior, and construction decisions that affect embankment stability.
Sample Practice Questions
Review a selection from this exam's published US Practice Tests practice bank.
A contractor is preparing an earthwork cost estimate for a project with uncertain fuel prices and weather delays. Which approach best communicates that uncertainty to the owner?
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Correct answer: BDocumented assumptions and an appropriate contingency or estimate range make key uncertainties visible and support informed planning. An estimate should not imply unsupported precision.
A temporary sediment basin is being constructed to receive runoff from an active earthwork area. Which feature most directly helps reduce the velocity of incoming water before it reaches the basin outlet?
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Correct answer: AA stabilized inlet or energy dissipator reduces the energy of incoming flow and helps limit scour and resuspension. Increasing the approach slope or using loose soil can aggravate erosion; outlet capacity and overflow protection must also be properly designed.
A levee project includes a relief well intended to reduce excess pore-water pressure. Which condition should prompt prompt evaluation by the responsible engineer?
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Correct answer: CTurbid discharge or transported soil can indicate internal erosion or another developing problem. It warrants prompt reporting and evaluation; the well should not be altered without direction.
A levee work area is forecast to receive heavy rain before exposed soil can be stabilized. Which planning action is most useful for limiting damage from runoff during the storm?
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Correct answer: APlanning and installing appropriate temporary drainage and erosion controls before a storm can reduce concentrated flows, erosion, and sediment movement. Measures should suit site conditions and project requirements.
When a new embankment is to tie into an existing earth slope, why is the existing slope commonly benched before new fill is placed?
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Correct answer: ABenching interrupts a smooth contact surface and provides a more stable connection between the existing ground and new fill. The new material must still be placed and compacted as specified.
A project specification requires a borrow soil to be approved before it is used in a levee fill. Which information is most useful for evaluating whether the material is suitable for the intended fill zone?
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Correct answer: ASoil classification and relevant properties, such as gradation and plasticity, help determine whether material is appropriate for the specified zone and performance requirements. Haul distance, color alone, and fleet size do not establish engineering suitability.
For a simple trapezoidal drainage channel with a bottom width of 4 feet, side slopes of 2 horizontal to 1 vertical, and water depth of 3 feet, what is the wetted cross-sectional area?
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Correct answer: CEach side adds 2 × 3 = 6 feet to the top width, so the top width is 16 feet. The trapezoid area is (bottom width + top width) ÷ 2 × depth = (4 + 16) ÷ 2 × 3 = 30 square feet.
How to use this practice test
The free practice session presents up to 20 random questions from the 50-question bank and displays results when the session ends. Use missed items to identify concepts to revisit, such as channel-area calculations, borrow-soil suitability, compaction response, or runoff controls. For calculation questions, check both the setup and units.
Preparation tips
- Practice calculating trapezoidal channel area from bottom width, side slopes, and water depth; verify the units in each step.
- For embankment and levee scenarios, distinguish between unsuitable borrow material, inadequate compaction, and a soft or pumping foundation, then identify the appropriate field response before covering the area.
- Review how incoming flow velocity, sediment-basin configuration, and riprap sizing relate to erosion and channel-bank protection.
- Plan controls for exposed earthwork ahead of heavy rain, including measures that limit runoff and soil loss before permanent stabilization.
- When estimating earthwork costs, identify uncertain inputs such as fuel prices and weather delays and clearly communicate their potential effects to the owner.