高级电焊工理论复习题一（A senior welder theoretical review questions）.doc

高级电焊工理论复习题一（A senior welder theoretical review questions） A senior welder theoretical review questions A choice (first to 80 questions, each question 1 points out of 80 points): The welding crack test 1. oblique Y groove specimens on both sides of the welding restraint weld groove (open). (A) X - (B) Y - (C) Y (D) U oblique shape shape The 2. pin test, the thickness of the base plate (generally). (A) 5~l0mm (B) 10~30mm C) 30~40mm (D) 40~45mm 3. the varestraint test when the thickness of the test plate (up). (A) 5mm (B) 10mm (C) 16mm (D) 20mm 4. bending test was used to determine the weld metal or welded joints (). (A) toughness (B) density (C) (D) plastic fatigue 5. bending test, carrycurved (assessment). (A) (B) plastic weld weld quality of single root (C) multilayer welding interlayer defects (D) the bonding strength between the welding layer and base material 6. of the joint pipe bending specimen should check the specimen cut (a). (A) 1 (B) 2 (C) 3 (D) 4 7. bend to the specified angle, the tensile surface has a length (for) the longitudinal cracks or defects as unqualified (A) 1mm (B) 2mm (C) 2.5mm (D) 3mm 8. the same kind of material, when one side welding, the bending angle than double welding (qualified). (A) the (B) big (C) small (D). 9. conventional test method for the determination of brittle transition temperature (is). (A) fatigue test (B) (C) tensile test bending test impact test (D) 10.U shaped and V shaped specimens, the measured value of impact () shall carry out conversion between each other. Yield (A) (B) (C) plastic elastic toughness (D) Metal materials are processed into standard samples of 11. impact tests to be measured, and then put in, () is placed in the gap of the sample should be back to the direction of impact pendulum. (A) support operation machine (B) on the displacement of the support on the machine (C) elevator bearings (D) bearing tester. Impact test temperature for the steel shall be 12. (the minimum design temperature of cryogenic v