大工11秋《水电站修建物》在线功课2(国外英文资料).doc

大工11秋《水电站建筑物》在线作业2(国外英文资料) Big work 11 autumn hydropower station building online homework 2 Test scores: 100 test time: - test scores: 100 The problem of choice is choice (10 questions, 40 points.) Score: 40V 1. In the valve of the pressure line, the ball valve is open without water head loss and water tight. A. mistakes B. right 4 points: 4 Vertical water intake is difficult when the reference flow is too high. A. mistakes B. right 4 points: 4 3. The collection of water power station is refers to the water network, using channels or tunnel of the adjacent small tributaries of the water into the gap with centralized location for power generation of hydropower station. A. mistakes B. right 4 points: 4 The thickness of the hardened rock formations around the pressure water tunnel should be less than 2 times the diameter of excavation, so as to reduce the internal water pressure. A. mistakes B. right A full score: 4 The dam can form a larger reservoir and use more water, so the water can be used less well. A. mistakes B. right A full score: 4 The pressure pipe embedded in the concrete dam is called the inside of the dam, which is often used to prevent rust. A. mistakes B. right A full score: 4 The layout of the pressure water tunnel should be given a certain longitudinal slope to meet the needs of slag and drainage. A. mistakes B. right 4 points: 4 In the force of steel pipe and pier, the friction of the piers and steel pipes is the normal force. A. mistakes B. right A full score: 4 Steel reinforced concrete back tube is a composite structure of lining concrete and outsourced steel. The pipe is located outside the dam body and does not allow the pipe wall to crack. A. mistakes B. right A full score: 4 Reducing water pressure in groundwater is the fundamental way to prevent the stability of steel lining. A. mistakes B. right 4 points: 4 Big work 11 autumn hydropower station building online homework 2 Test scores: 100 test time: - test scores: 100 The problem of choice