【Daily Topic】【HVAC Version 20170616】

2017-06-16View Original

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Participation reward: 2 Wealth. Correct reward: 6 wealth. Multiple-choice question: The selection of pumps for water supply stations should meet energy-saving requirements; when there are significant variations in water supply volume and pressure, it is advisable to use pumps with adjustable blade angles, speed control for the pumping units, or ( ). A. Valve adjustment B. Parallel operation of water pumps C. Changing the static head D. Replacing the impeller D

Reply #22017-06-16

The selection of pumps for water supply pump stations should meet energy-saving requirements; when there are significant variations in water supply volume and pressure, it is advisable to use pumps with adjustable blade angles, speed control for the units, or (D) and other such measures. A. Valve adjustment B. Parallel operation of water pumps C. Changing the static head D. Replacing the impeller

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【Daily Topic】【HVAC Version 20170616】

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