【Daily Question】July 3: The outlet valve of the centrifugal pump was closed during operation (first 80 participants + 2 correct answers earn an additional 3–8 wealth points)
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This post was last edited by A Le on 2015-7-4 11:07. The Mechanical Section has introduced the \"Question of the Day\" feature, which aims to foster an active atmosphere for technical exchanges and guide the direction of such discussions, while also providing users with financial rewards to help them experience various cool features. 【Daily Question】Regarding the outlet valve of a centrifugal pump, which of the following statements is correct? ( ) A. For a centrifugal pump that is in operation, the outlet valve can be kept closed for an extended period of time ； B. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause pressure buildup. C. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause vibration in the unit ； D. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this will cause the pump to overheat ； Answer: D. However, due to the imprecise wording of this question, strictly speaking both B and C are possible; but the main risk is indicated by option D – the heating of the pump body, which can lead to the vaporization of the medium and pose a danger as well as cause damage to the pump system. Therefore, for this question, answering D is sufficient; it counts as correct regardless of whether BC are answered or not. Requirements and hints for answering questions: Please reply with the answer you believe to be correct. If you provide a detailed explanation or analysis of the question or answer, an additional reward will be given. Extra rewards will be awarded if your answer is correct and your explanation is thorough and accurate. Feel free to answer the questions. Please note: We will close this thread after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation. Please do not answer the question repeatedly. As a reward for your effort, if you post a topic in this section within two days that provides a detailed explanation of the knowledge points related to this question, please reply or leave a comment in this post to inform us, and we will have a moderator assign you + Charm. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights and opinions. After registration, we will rank based on the content of the posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score earning +5 charm. Other content: Call for weekly topics and daily questions (prizes for participation) [Mechanical Section] Collection of essential knowledge [Seeking manufacturer sponsorship] (long-term campaign) [Rewards for recommending valuable content] Summary of daily questions and answers related to mechanical equipment for 2015
Regarding the outlet valve of a centrifugal pump, the correct statement is (D. During operation, the outlet valve of a centrifugal pump cannot be kept closed for an extended period, as this will cause the pump to overheat)； ）
D. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this will cause the pump to overheat
Regarding the outlet valve of a centrifugal pump, which of the following statements is correct? (D) A. For a centrifugal pump that is in operation, the outlet valve can be kept closed for an extended period of time； B. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause pressure buildup. C. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause vibration in the unit ； D. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this will cause the pump to overheat ；
B. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause pressure buildup. C. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause vibration in the unit ； D. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this will cause the pump to overheat ；
C, D. It must be correct. B represents the pressure that can be sustained, which is the maximum output pressure of the centrifugal pump; over time, this pressure can damage the seal.
B. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause pressure buildup.
Regarding the outlet valve of a centrifugal pump, which of the following statements is correct? B. In a running centrifugal pump, the outlet valve cannot be kept closed for an extended period of time, as this will cause pressure buildup. C. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this can cause vibration in the unit ； D. For centrifugal pumps in operation, the outlet valve should not be kept closed for long periods, as this will cause the pump to overheat ； It seems that all three of these scenarios are possible! ! ! ! !