【Daily Question: Pump Equipment】True or False Question, 2019.5.17

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bk14.jpg Rules for answering questions and management: 1. If all answers to a question are incorrect, a reward of 2 wealth points will be given for active participation； 2. In the answer section, a correct answer earns 5 wealth points ； A reward of 8 wealth for all correct answers ； 3. Rewards for answers are available once per person only ； 4. Each reply allows for one management rating only ； 5. The answer and explanation will be visible after responding ； 6. The reply reward is valid for 48 hours. Studying* and winning awards again; come by here every day. 1. At standard atmospheric pressure, water vaporizes at 100°C; therefore, it can be inferred that in a vacuum environment, water must also vaporize at 0°C ( ) ； 2. If the fit between the pump shaft and the coupling is loose (allowing movement along the shaft), a key with a tighter fit should be used to secure the coupling and prevent such movement (). Answer: 1. Incorrect (the conclusion is correct, but the causal relationship is wrong) ； 2. Error (the coupling or shaft should be replaced)