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| Section | Weight | Objectives |
|---|---|---|
| Geotechnical Engineering | 18% | - Soil Mechanics & Foundation Engineering
|
| Water Resources & Environmental Engineering | 12% | - Hydrology & Water Systems
|
| Structural Engineering | 20% | - Structural Analysis & Design
|
| Construction Management & Materials | 10% | - Construction Methods & Project Management
|
| Civil Engineering Fundamentals | 25% | - Engineering Mathematics & Applied Science
|
| Transportation Engineering | 15% | - Highway & Road Design
|
>> Civil-Engineering-Technology在線題庫 <<
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問題 #96
A civil engineering technologist is performing a concrete test on a site. What minimum number of cylinders should the technologist make?
答案：C
解題說明：
Concrete compressive strength is verified using standardized specimens that represent the delivered concrete.
A typical field/lab testing program preparesa set of cylindersso strength can be checked at standard ages and so at least one specimen remains available if a test is invalid or confirmation is required. InExperiment Design for Civil Engineering, the compressive strength procedure explicitly states thatsets of four cylindersshould be prepared and thenone cylinder from each setis tested at7, 14, 21, and 28 days. This "four-cylinder set" directly supports the minimum needed to obtain a time-history of strength development through the common curing ages used in practice and referenced by ASTM C39 age tolerances. While many projects may require additional cylinders (for 7-day early breaks, hold cylinders, or additional acceptance tests), the question asks theminimumnumber, and the documented testing set described isfour.
問題 #97
A subcontractor is completing surface rehabilitation in a mature community. What are the minimum requirements for quality that must be met?
答案：B
解題說明：
In municipal surface rehabilitation, the governing minimum quality requirements are set by themunicipality's standards/specifications, because the work interfaces with, affects, and is often handed over to municipal infrastructure (roads, sidewalks, utilities, drainage). Municipal specifications define accepted materials, compaction/density requirements, asphalt/concrete placement tolerances, testing frequency, restoration details, and acceptance criteria. Contractor or subcontractor internal specs may exceed municipal requirements, and warranties/insurance address risk allocation, but they do not replace theowner/authority's technical acceptance standards. In civil engineering practice, "specifications" are the formal technical requirements that the delivered system must meet (minimum/maximum/range), including items like minimum density of roadbed, tolerances, and material performance-these are typically established by the owning agency (here, the municipality) for public infrastructure assets. Thus, the minimum quality threshold is defined by themunicipality specifications.
問題 #98
What is the bearing capacity of soil?
答案：B
解題說明：
In foundation engineering, "bearing capacity" refers to themaximum bearing pressurethat soil can support under a foundationwithout a shear failure mechanismdeveloping in the ground, and (in allowable/safe terms) without causingexcessive settlement. In practice, design is based onallowable bearing capacity
/allowable bearing pressure, which is the net pressure (beyond overburden) that will not cause shear failure or excessive settlements, after applying an appropriate factor of safety. This concept is tied to classic bearing- capacity theories (e.g., Terzaghi) that predict shear failure along defined surfaces beneath a footing.
Therefore, the best definition among the options is the one referencingmaximum pressure without shear failure, not a "concentrated load," compaction, or "crumbling."
問題 #99
The invert elevation of a sanitary sewer line is 98.150 m, the pipe thickness is 12 mm and its outside diameter is 600 mm. Using the image below, what is the crown elevatf m
答案：D
解題說明：
Invert elevation is the elevation of theinside bottomof the pipe. With outside diameterm and wall thicknessm, the inside diameter ism. The vertical distance from invert (inside bottom) to theoutside top of pipeism, giving the outside top-of-pipe elevation:m. The section detail in the provided image shows the vertical cover from top of pipe to top of asphaltas approximately2.476 m(dimensioned in the road section). Adding this cover gives the road crown elevation:m, matching optionA. This uses standard civil geometry conversions between invert, pipe dimensions, and surface elevations used in utility/roadway inspection and verification.
問題 #100
A concrete mix is onsite and at its specified slump of 80 mm. The pour requires a slump of 200 mm. The concrete onsite meets all other requirements. What action should be taken?
答案：A
解題說明：
Increasing slump from80 mm to 200 mmis a large jump in workability. Adding water would increase slump but typically raises the water-cement ratio, which can reduce strength and durability and increase cracking risk unless it remains within permitted limits and is authorized. Industry guidance on jobsite water addition recommends consideringwater-reducing admixtures / superplasticizersas the preferred alternative for increasing slump while maintaining concrete performance, provided segregation is avoided and proper mixing is performed.
Ahigh-range water reducer (HRWR), also called asuperplasticizer, is specifically intended to produce a major increase in slump/flow at essentially the same water content, achieving very high workability concrete for placement. Low-range water reducers typically do not provide such a large slump increase. Therefore, the correct action is toadd a high-range water reducerto achieve the required 200 mm slump without compromising the designed water-cement ratio and associated properties.
問題 #101
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