One Question per Day on Refining Knowledge (Technology) 110418

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This post was last edited by lijianhuai on 2011-8-5 09:51. Everyone is welcome to actively participate in the learning and discussion of professional basic knowledge in the refinery processing technology exchange area! In accordance with the forum’s unified requirements, the maximum score for this activity is 5 Wealth points, and rating charm is prohibited. Friendship requests and duplicate ratings are also declined. Be careful when posting; editing is ineffective. Those who have different opinions on the provided answer keys can post discussions the next day; those who provide solutions or their own opinions regarding the daily question’s answer key will receive appropriate rewards! The focus is on participation, and there are prizes for it. Please hide your replies; those that are not hidden will be deleted. Instructions for hiding replies: Click on \"Hide\" in the title menu (the option will become visible when the mouse is placed over it), and then place the content that you want to hide between \"hide\" and \/hide. For more details, see http://bbs.hcbbs.com/thread-492556-1-1.html. True or False question: 1. When installing differential pressure flow meters, it is required that there be sufficient lengths of straight pipe sections upstream and downstream of the device. ( ) 2. Gradual vaporization is actually composed of an infinite number of primary vaporization processes. ( ) 3. It is generally better to use an inlet valve for controlling the water flow in the cooler. ( ) 4. The magnitude of the saturated vapor pressure depends only on the temperature of the system, and is unaffected by other factors. ( ) 5. Lubricants with low viscosity should be used when operating under conditions of low speed and high load. ( ) Reference answer:√√×××