【Daily Topic】【HVAC Version 20160902】
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Participation reward: 2 Wealth. Reward for the correct answer: 9 wealth. When the pressure in the water supply network exceeds the maximum allowable pressure at the distribution points, a pressure reducing valve should be installed. In areas where quiet conditions are required, the maximum pressure difference before and after the adjustable pressure reducing valve should be ( ). A. It should not be greater than 0.3 MPa. B. It should not be greater than 0.5 MPa. C. It should not be greater than 2:1. D. It should not be greater than 3:1. Correct answer: A
A. Should not be greater than 0.3 MPa
Correct answer: D Refer to Article 3.4.9 of the \"Code for Design of Building Water Supply and Drainage\" (GB50015-2003)
B. Should not be greater than 0.5 mpa
A. It should not be greater than 0.3 MPa. When the pressure in the water supply network is higher than the maximum allowable operating pressure at the distribution points, a pressure reducing valve must be installed. In areas where quietness is required, the maximum pressure difference before and after the adjustable pressure reducing valve should be (A. It should not be greater than 0.3 MPa).