土木工程选择题（Selection of Civil Engineering）.doc

土木工程选择题（Selection of Civil Engineering） First, the multiple-choice question 1. indicators of resistance to water damage are (C). A. impermeability grade, B. permeability coefficient C., softening coefficient D., frost resistance grade 2. hot summer mass concrete construction, we must join the admixture is (B). A. accelerator, B. retarder, C.CaSO4, D. air entraining agent 3. the following materials may be used as load-bearing structures (D). A aerated concrete, B plastic, C gypsum board, D lightweight aggregate concrete 4. fired common brick is widely used in the wall, mainly because it has the following (except B) performance characteristics. A a certain strength, B high strength C, good durability, D insulation better 5., the aging process of lime is to (C). A. is good for crystallization, B. evaporates excess moisture, C. eliminates excessive lime, and D. reduces heat 6., Portland cement stone poor heat resistance, mainly because cement stone contains more (C). A hydrated calcium aluminate, B hydrated calcium ferrite, C calcium hydroxide, D calcium silicate hydrate 7. when the degree of delamination of the masonry mortar is (B) mm, the water retention and the hardening properties of the mortar are better. A.0-10 B.10-20 C.30-50 D.60-80 8., the biggest additive to the early strength of concrete is (B). A, M agent, B, sodium sulfate, C, NaNO3, D, air entraining agent 9. fluidity index of mortar is (C). A B layered slump degree C sinking degree D Vebe consistometer 10. in the dry environment, the concrete that has the requirement of cracking resistance is the cement chosen (B). A. slag cement, B. ordinary cement, C. fly ash cement, D. volcanic ash cement 11. when mixing concrete on site, it is found that the most feasible improvement measures are (A) when the adhesion is not good A appropriately increase sand rate, B, water slurry (W/C unchanged), C, increase the amount of cement, D plus CaSO4 12. when measuring the static compressive modulus of elasticity of concret