实务单选（Practice radio）.doc

实务单选（Practice radio） 1. in the flexural member, sometimes the longitudinal bar is bent at the support to form a bent reinforcing bar, whose main function is (B). A. Bending, B., shear, C., torsion, D., earthquake resistance 2. in order to ensure the steel and concrete bonding and casting density, normal indoor environment and the upper beam bottom reinforcement spacing should be not less than (A mm). A.25, 30 B.30, 25 C.25, 35 D.35, 25 3., under the combined action of axial pressure and shear force, the compressive strength of concrete is higher than that of its axial compressive strength (B). A. Increase B. decrease C. increases with the increase of shear stress, but the shear stress is too large, while the compressive strength decreases, and the D. is indeterminate 4. which of the following is the basis for calculating the strength of a steel bar with apparent flow amplitude (A)?. A. yield strength; B. ratio limit; C. limit strength; D. condition; yield strength 5., a five span continuous beam to withstand uniform live load, the calculation of second bearings at the maximum negative bending moment, the living load should be how to layout? (C). A. cloth at first, 2 span, B. cloth, in first, 2, 3 span C. cloth at first, 2., and 4 spans D. cloth at first, 3, and 5 spans 6. a cast-in-place slab round cover has a size of 300 x 500 (unit: mm) of the hole, then the hole edge should take what kind of measures of strengthening? (C) A. does not need to handle the B. plate, the steel bar bypasses the entrance hole, C. sets the stiffener, the D. adds the secondary beam The main reason for the compression of steel bars in 7. beams is (C). A. assist concrete compression, reduce cost, B. assist concrete compression, raise cost C. section internal force is big, section size is limited, D. improves section ductility Cracking load on members of 8. beams with steel bars (B). A. had a significant effect on B., with little effect on C. and no effect on D., depending on the specific si