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| Section | Objectives |
|---|---|
| Civil Engineering Materials and Construction | - Construction Methods and Techniques - Concrete, Steel, and Asphalt Properties |
| Surveying and CAD Applications | - Land Surveying Principles - Computer-Aided Design (CAD) Usage |
| Transportation Engineering | - Roadway Design Basics - Traffic and Pavement Considerations |
| Geotechnical Engineering | - Soil Mechanics - Foundation Design Principles |
| Professional Practice and Ethics | - Engineering Ethics - Legal and Regulatory Responsibilities |
| Hydraulics and Hydrology | - Drainage and Water Management Systems - Fluid Mechanics Fundamentals |
| Engineering Fundamentals | - Mathematics and Applied Calculations - Engineering Principles |
| Structural Engineering Basics | - Structural Analysis Fundamentals - Design Principles and Load Considerations |
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NEW QUESTION # 103
A contractor is using a compactor on a hot and dry day and quickly compacts a dry 300 mm thickness of sub- base without adding water. The soil is near optimum moisture. A civil engineering technologist completes compaction tests and finds that specifications have not been achieved. What should be done?
Answer: A
Explanation:
Compaction acceptance is based on achieving specifiedin-place dry density(relative compaction) at an acceptable moisture range. If the material is alreadynear optimum moisture, failure to meet density typically points toinsufficient compactive effort,inadequate number of passes,improper equipment, orexcessive lift thickness(300 mm can be too thick for some sub-base and equipment combinations). Standard compaction theory shows that near OMC, soils should densify efficiently; if density is still low, the first corrective action is toincrease compactive effortand verify results with another field density test. Adding water when already near OMC may push moisture above optimum and can reduce achievable dry density.
Continuing with base placement would lock in a nonconforming layer, and stripping/importing new material is a last-resort remedy after reasonable rework attempts. Therefore, the best immediate corrective action is to re-compact and retest, adjusting lift thickness/passes as needed to meet specification.
NEW QUESTION # 104
A civil engineering technologist is taking a sample of concrete cylinders from a truck. When should the sample be taken?
Answer: B
Explanation:
Concrete cylinder samples must represent thedelivered batch, so sampling must avoid the non-representative portions at the beginning and end of discharge where segregation and water/aggregate distribution can differ.
ASTM C172/C172M sampling practice requires collecting acomposite samplefrom themiddle portionof the load: specifically, not before about10%and not after about90%of the batch has been discharged, using two or more portions taken at regularly spaced intervals. A paper hosted by ASTM discussing sampling from truck mixers references ASTM C172/C172M and its requirement for collecting multiple portions from the discharged batch. Training/field guidance consistent with ASTM C172 also states sampling should occur after
~10% and before ~90% of discharge (i.e., the middle of the load). Therefore, the correct answer isin the middle of the load (Option C).
NEW QUESTION # 105
What must an employer do if an employee could be exposed to hazardous materials on a work site?
Answer: B
Explanation:
When hazardous materials may be present, employers must implement ahazard control program: identify hazards, communicate them, and apply controls (engineering, administrative, PPE) to prevent or minimize exposures. The USACE Safety and Health Requirements Manual (EM 385-1-1) requires employers to establish and enforce safety procedures and controls for hazardous substances, including hazard communication and safe work practices, rather than relying on a single measure like removing all hazards or issuing hazmat suits in every case. Air sampling may be necessary for certain exposures, but it is not universally required "prior to starting work" in every scenario; similarly, removing all hazardous materials is not always feasible. Therefore, the required primary action is toestablish procedures to minimize employee exposure(controls, training, and safe handling requirements).
NEW QUESTION # 106
What subsurface sampling would be most likely conducted during a preliminary site investigation for a proposed building?
Answer: C
Explanation:
A preliminary site investigation for a building focuses on defining subsurface stratigraphy and basic engineering characteristics byexploring the ground and documenting soil/rock conditions versus depth.
Standard practice usesborings (drilling/boring)to obtain samples and observations, which are then recorded asborehole logsdescribing layers, groundwater, and recovered materials. The sampling provides representative soils for index testing and classification, but the fundamental "subsurface sampling" deliverables at the preliminary stage are thesoil samples retrievedand theborehole logsthat document what was encountered. Broader design deliverables like grading plans, final elevations, or pavement Marshall testing are not part of preliminary geotechnical sampling for a building footprint. Civil engineering references describe subsurface exploration as involving drilling/boring and retrieving soil/rock samples at various depths, with the engineer examining cuttings and recovered samples to characterize the profile-information typically captured in borehole logs.
NEW QUESTION # 107
Which of the following can a civil engineering technologist request from a concrete supplier to verify that concrete falls within municipal specifications?
Answer: B
Explanation:
For ready-mixed concrete deliveries, compliance verification is commonly supported by thedelivery/batch ticket(often called the concrete delivery ticket). Industry guidance tied to ASTM C94 emphasizes that the ticket includes critical batch information (such as batch time and related data) used to confirm compliance with specified requirements and limits (including time limits for discharge and other production/traceability details). Because municipal specifications typically require confirmation of the delivered mix identification, quantities, admixtures, batching time, and other relevant production details, the batch/delivery ticket is the most direct document a technologist can request at the site to verify the delivered concrete aligns with the specified mix and placement requirements. A mix design submittal can show intended proportions but does not prove what was actually batched and delivered for that load; "batch location" alone is not sufficient;
"geotechnical mix design" is not applicable. Therefore, the correct item is thebatch ticket from the plant.
NEW QUESTION # 108
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