【Daily Question】Utilities - Water Supply and Drainage - 20190930

2019-09-30View Original

Thread Content

Among the following pressure-fed water supply systems, as well as constant-pressure, variable-pressure, and variable-flow water supply devices, ( ) is more efficient and energy-saving. A. Single-tank variable-pressure air pressure water supply device B. Dual-tank constant-pressure air pressure water supply device C. Diaphragm-type air pressure water supply device D. Variable-frequency speed-control constant-pressure automatic water supply equipment Answer: D

Reply #22019-09-30

D. Variable-frequency speed control constant-pressure automatic water supply equipment

Reply #32019-09-30

D. Variable-frequency speed control constant-pressure automatic water supply equipment

Reply #42019-09-30

D. Variable-frequency speed control constant-pressure automatic water supply equipment

Reply #52019-09-30

D. Variable-frequency speed control constant-pressure automatic water supply equipment

Reply #62019-09-30

D. Variable-frequency speed control constant-pressure automatic water supply equipment

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