Thesis test (with answers) for the senior pump reviewer: 1 theoretical test for the project to the left of the bound line is completed before the response. 2 the responses must be blue or black pens, round pens and must not use pencils or red pens. 3 this test paper has six major issues with 100 full scores and 120 minutes of examination time. Select the question (please type the symbol of the correct answer in brackets, with a total of 20 points for each item). The amount of scraping left by mechanical processing should not be too large and normally () mm. (a) 0. 04 ~ 0. 05; (b) 0. 05 ~ 0. 4; (c) 0. 4 ~ 0. 5; (d) 0. 5 ~ 1. Answer: b2. Preheating temperature of molybdenum steel, chromium steel, chromium steel pipe before welding () (a) 200 ~ 250°c; (b) 250 ~ 300°c; (c) 350 ~ 400°c; (d) 400 ~ 450°c. Answer: b3. All lengths of the steering axle of the vertical axle pump are () above. (a) 65%; (b) 70%; (c) 75%; (d) 80%. Answer: c4. When the axle is poured into wagukin, the temperature of the bottal heating shall be around () (a) 200 ~ 220°c; (b) 220 ~ 240°c; (c) 250 ~ 270°c; (d) 280 ~ 300°c. Answer: c
