工程基础期末测验 与谜底B(国外英文资料).doc

工程基础期末考试 与答案B(国外英文资料) The first semester of the 2013-2014 academic year (open book B) (using the answer sheet) Class 1, 1001, 1002 name of project engineering cost class qid Total score score One, the choice (total ten, two points per problem). The critical force is 50KN. If the component is fixed at both ends, its critical force is () KN. A. 50 b. c. Outdoor welding steel structure in cold areas should be preferred. A.Q 275 - BF, b.235-c C.Q 275 d.235 - AF The cube compressive strength is fcu, the compressive strength of the prism is fc, the tensile strength is the ft, the strength sequence of the same concrete is (). A. fc fcu C. fcu fcu The stress-strain curve of low carbon steel tensile tests can be roughly divided into four phases, which are (). A. elastic stage, yield stage, plastic deformation stage, fracture phase B. the stage of elasticity, the stage of plastic deformation, the strengthening stage, the contractions C. the stage of elasticity, the yield stage, the reinforcement phase, the fracture phase D. the stage of elasticity, the stage of yield, the stage of reinforcement, the contraction of the neck The following statement about reasonable sand rate selection is incorrect (). When choosing fine sand, the sand ratio should be smaller than the middle sand When the W/C is large, the sand ratio should be larger C. when the pebble is chosen, the sand rate should be smaller than when the gravel is used D. The sand rate should be smaller when elected with single grain size In the case of raw materials, the determining factor influencing the strength of concrete is (). The amount of cement A C. cement grade D Which of the following processes will not contract? () A. concrete carbonized b. lime hardened C. the concrete loses water The large size concrete project of summer construction should be preferred to the admixture (). A. A water reducer C. moderator d. expansion agent The type of colloidal structure formed when the content of oil, resin and asphalt i