桥涵单选题（Bridge and culvert radio problem）.docVIP

桥涵单选题（Bridge and culvert radio problem） The test of bridge and culvert engineering test 1, a construction project belongs to the unit project all qualified, and good rate of (A) and above, and construction project quality The construction project is rated as good when the quantity score is not less than 85 hours. A, 80%B, 90%C, 95% 2, debugging ultrasonic testing instrument, measured t. = 5 s, the sound distance of a given point is L = 40cm, and when the instrument shows the sound is 105 Mu s, the sound velocity of ultrasonic propagation in concrete is (C). A, 3636m / s, B, 3810m / s, C, 4000m / S 3. When rubber bearings are tested, the ambient temperature and relative humidity requirements are (B). A, 18, 50C, (60, 5),%B, 23, soil, 50C, (65, 5)%C, 23 50C, (60, 5)% 4, steel strand routine inspection of the standard distance length is generally not less than (A). A, 50cm, B, 60cm, C, 70cm 5, each batch of hot rolled ribbed steel bar tensile test and bending test specimen number (B) respectively. A, 1 and 2, B, 2 and 2, C, 2, and 1 6, steel tensile and cold bend test, if there is a test result does not meet the standard requirements, then from the same batch of (A) a multiple of the sample for the unqualified project review. A, 2 B, 3 C, 4 7. In the cold bending test of hot rolled bar, the ratio of the bending center diameter to the diameter of steel bar (B), the angle of bending and the diameter of steel bar (B). A, invariant, independent of B, change, about C, change, independent of 8 、 in the tensile test of hot rolled steel arc welding joint, the tensile strength of (A) joints is not lower than that of the grade Prescribed strength, and at least (A) specimens shall be ductile fracture. A, 3, 2, B, 2, 1, C, 3, 3 9, plate (Fang Xing) rubber bearings ultimate compressive strength test pressure is (A). A, 70MPa, B, 80MPa, C, 90MPa 10, for the sand in the most loose state, the relative density is Dr (C). A, 0.5 B, 1 C, 0 11, drilling concrete core sample diameter is ge