[Engineering Version] Daily Question 20171231

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Which of the following statements about high-pressure storage and distribution stations are correct? (　　) 　　A. During off-peak times, gas from the high-pressure storage tanks and from the high-pressure main lines after primary pressure regulation converges and is then sent to the city after secondary pressure regulation.
B. During peak times, part of the gas coming from the high-pressure gas main lines enters the high-pressure storage tanks after primary pressure regulation, while another part enters the city after secondary pressure regulation.
C. To improve the utilization rate of the storage tanks, an ejector can be installed at the station.
D. In addition to improving the utilization rate of high-pressure storage tanks, an ejector can reduce the pressure inside the tank that needs to be inspected to the lowest level.
E. Besides improving the utilization rate of high-pressure storage tanks, an ejector can reduce the amount of gas that must be released into the atmosphere during inspections, thereby enhancing economic efficiency.
Correct answers: CDE