【Daily Topic】【HVAC Version 20170601】
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Participation reward: 2 Wealth. Correct reward: 6 Wealth (please hide the answer.) Method: Advanced mode -- click the icon that combines a lock and a basket -- add hidden content -- submit). Note: Replies that are not hidden will no longer be rated. Single-choice question: The flow rate of a certain water distribution pipe is 25 l/s, and its diameter is 80 mm (with a corresponding flow velocity coefficient of 0.201 m/s). A pressure-reducing orifice plate is installed, with an orifice diameter of 50 mm (it is known that the corresponding local resistance coefficient is 9.3). Then, the pressure reduction value provided by this orifice plate is ( ). A. 5.02 MPa (10^-2 MPa) B. 5.93 MPa (10^-2 MPa) C. 11.85 MPa (10^-2 MPa) D. 7.85 MPa (10^-2 MPa) C
C.11.85 mpa(10-2 mpa)
C.11.85 mpa(10-2 mpa