【Daily Question: Pump Equipment】Fill-in-the-blank question, April 5, 2019

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This post was last edited by 3983596_FPPZ on 2019-4-6 at 12:34: bk14.jpg. 1. Those who get both questions wrong receive +2 Wealth for active participation; those who get one question wrong and one right receive +5 Wealth; those who get both questions right receive +8 Wealth. 2. If only one answer is provided, unless it is clear which question’s answer it is, a correct answer earns +5 wealth points, while an incorrect answer earns +2 wealth points; in all other cases, it is counted as active participation and awards +2 wealth points. 3. Rewards for answers are available once per person only. 4. Each reply allows scoring for only one person. 5. The answer and its explanation will be visible after responding. 6. The reward is valid for 48 hours; no reward will be given after that period. Studying* and winning awards again; come by here every day. 1. A centrifugal pump with a flow rate of 150 m3/h, head of 36 m, efficiency of 82%, medium specific gravity of 1.2, rotational speed of 2950 RPM, and motor power of 30 KW. If this pump operates continuously for 15 days under these parameters, the electricity consumption will be ( ) kilowatt-hours ； 2. The inlet pressure (G) of the centrifugal pump is 0.2 kgf/cm2, the outlet pressure (G) is 0.86 MPa, and the specific gravity of the fluid is 0.84; then the pump head at this time is ( ) meters. Answer: 1, 150*36*1.2/(3.6*102*0.82) = 7747.5 ； 2. (0.86-0.02)*100/0.84=100 Tip: Qingming Festival is the most solemn and grand festival for honoring ancestors among the Chinese nation; it is a cultural tradition focused on showing respect for ancestors and remembering those who have passed away. The Qingming Festival embodies the national spirit, carries forward the sacrificial culture of Chinese civilization, and expresses people’s moral feelings of respecting ancestors and continuing their legacy. The Qingming Festival has a long history, originating from the spring sacrifice rituals of ancient times; these sacrifices took place in both the Spring and Autumn periods, as was common in ancient days. The establishment of the ancient Heavenly Stems and Earthly Branches calendar created the prerequisites for the formation of festivals, while ancestral beliefs and sacrificial cultures were important factors in the development of the customs related to ancestor worship during the Qingming Festival. The Qingming Festival has a long historical origin; it is a synthesis and refinement of traditional spring customs. The Qingming festival is one of the twenty-four specific seasonal markers in the sexagenary calendar used to indicate changes in seasons. During this time, old things give way to new ones, vitality is at its peak, temperatures rise, and everything becomes clean and tidy; the earth takes on a serene and beautiful spring appearance. It is an ideal time for going outdoors to enjoy the spring scenery as well as for performing tomb visits. The Qingming Festival has a rich set of traditions, which can be summarized as two main customs: one is to show reverence for ancestors and to remember them with solemnity ； Second is going on outings in the countryside to get close to nature. The Qingming Festival embodies both natural and cultural aspects; it is both a solar term and a festival. Besides themes of mourning, remembrance, and reflection, it also includes elements such as going out in the countryside to enjoy the scenery and relax. The traditional concept of unity between humanity and nature is vividly reflected in the Qingming Festival. Through historical development, the Qingming Festival has incorporated the traditions of the Cold Food Festival and the Shangsi Festival, blending various local customs together and thus possessing an extremely rich cultural significance.