Primary Builders Municipal Public Works Management and Practice Paper No. 3 in 2019 1Because the influence of driving load and natural factors on pavement decreases with the increase of depth, the modulus of resilience of pavement materials should be from top to bottom (). A. decline 2Asphalt pavement must maintain high stability. One of the meanings of "stability" refers to (). D. Sensitivity to low temperature and humidity 3In order to improve the performance of pavement structure, cushion should be installed in urban cement concrete road under the bad temperature and humidity conditions.The following statement about cushion (). A. Antifreeze cushion should be made of granular materials such as sand and gravel. B. The drainage cushion should be made of granular materials such as sand and gravel. D. Inorganic binder is suitable for semi-rigid cushion 4Regeneration of asphalt is the reverse process of asphalt aging. Regeneration agent is added to old asphalt to improve (). Rheological properties of B. 5The statement of steel sheet pile cofferdam (). A. Riverbeds with large driftstones and hard rocks should not be used B. The order of fighting is generally from upstream to downstream. C. It is unsuitable to use water jet method to sink in clay D. Joints of adjacent steel sheet piles should be staggered 6The following statements about sinking piles (). A. Hammer-driven piles should be used in sandy soil and clayey soil. B. Vibration piling is suitable for compact clay, gravel and weathered rock with poor hammering effect. C. Penetration should be determined by piling test or piling test in conjunction with supervision and design units. D. For dense pile groups, symmetrical driving is carried out from the middle to two directions or around. 7In the following statement about steel bar connection (). A. Resistance spot welding should be used for cross-point welding of steel mesh B. Reinforcement joints should be located at places with less stress. C. In the same connection section, the same steel bar shall not have two joints. D. In construction, if the stress of reinforcing bar is not clearly distinguished from that of tension or compression, it shall be treated as tension. 8In post-tensioned prestressing construction, grouting should be carried out in time after the prestressing tendons are stretched. The following statement about grouting is incorrect. A. Grouting should be done at night when the daytime temperature is higher than 35 degrees Celsius. B. During the grouting process and within 48 hours after grouting, the temperature of structural concrete shall not be lower than 5 C. C. No less than three groups of mortar blocks should be retained for 28 days in each working class of grouting operation. D. The strength of cement slurry should meet the design requirements and should not be less than 30 Mpa when the design is not required. 9The freezing method is often used to consolidate the stratum in the construction of underground excavation. The following advantages of the freezing method are (). A. Strong ground strengthened by freezing B. Good sealing effect of groundwater D. Good consolidation of strata as a whole 10The CRD method is based on the CD method, which is the so-called crosswall method. A. Temporary inverted arch 11Ground bolts are arranged in rectangular or plum-blossom shapes. The correct sequence is (). B. Boring Blowing Grouting Inserting bolt Hole fixed bolt 12The following physical treatment methods belong to the sewage treatment method are (). A. Screening and Interception B. Gravity Separation C. Centrifugal Separation 13The trial operation of water supply and sewage treatment plants includes (). B. Single engine test run C. On-line operation D. No-load Operation 14In closed water test, the division of test section should meet the requirements (). A. Closure test of non-pressure pipeline with well test B. When two (or more) pipes are used in pipelines, it is advisable to test them separately according to different pipes. C. Closure test of non-pressure pipeline should not exceed five continuous wells in one test D. The length of hydraulic test section of pressure pipeline should not be greater than 1.0 km 15Under the same conditions, which of the following soils has the slowest slope during trench excavation (). B. Medium-dense sandy soil Soft Soil-Medium Dense Sand-Medium Dense Crushed Stone Sand-Hard Plastic Silt-Medium Dense Crushed Stone Clay-Hard Plastic Silty Clay-Loess 16The fol

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