Rock Strata Control Simulation Technology答案2023秋

第三章测试

1.Clay can be used as both aggregate and cementing material.（ ）
A:对 B:错
答案:A
2.The mechanical properties of materials can be changed by changing the ratio of materials.（ ）
A:对 B:错 3.The larger the particle size of sand, the smaller the strength and elastic modulus of the material.（ ）
A:对 B:错 4.Calcium carbonate is a plastic material.（ ）
A:错 B:对 5.Coarse mica with a diameter of D =1.4 ~ 5 mm should be used for the simulation of weak surfaces such as interlayer cracks and joints.（ ）
A:对 B:错 6.The following materials that are not aggregate are （ ）.
A:Powdered iron B:Lime C:tailings D:Mica powder 7.What can be used to increase the plasticity of the material（ ）.
A:resin B:asphalt C:Diatomite D:clay 8.Fine mica with diameter d= () mm should be used for separation of mica powder（ ）.
A:0.3～0.5 B:0.5～0.7 C:0.7～0.9 D:0.1～0.3 9.The following materials are the cementing materials（ ）.
A:kaolin clay B:gypsum C:cement D:liquid glass 10.What are the disadvantages of gypsum materials（ ）.
A:hard to obtain B:Easy to absorb moisture, material strength will be reduced C:The strength of similar materials is sensitive to gypsum dosage, which is not easy to control D:Unstable performance