One Question per Day on Refining Knowledge (Technology) 101106

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This post was last edited by chengkang on 2010-11-7 07:04. Everyone is welcome to actively participate in the learning and discussion of professional basic knowledge in the Refining 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. Please be cautious when posting; edits will not be valid! Those who have different opinions on the provided answer keys can post discussions the next day, and 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! Multiple-choice questions: 1. The commonly used pressure measuring instrument that does not require remote transmission is ( ). A. Bourdon tube pressure gauge B. Diaphragm pressure gauge C. Electro-pneumatic pressure transmitter D. Hall-effect spring-type remote transmission pressure gauge. 2. Compared with small centrifugal pumps, large centrifugal pumps have a higher efficiency ( ). A. Higher B. Equal C. Lower D. It cannot be determined. 3. The inner diameter of the seamless pipe ф108χ3.5 is ( ). A. 100 B. 108 C. 104.5 D. 1014. The critical temperature that distinguishes a cold oil pump from a hot oil pump is ( ). A.150 B.200 C.250 D.3005. The main anti-corrosion methods for atmospheric and vacuum distillation units are ( ). A. \"One removal and three injections\" for material corrosion prevention; B. \"One removal and three injections\" for electrochemical corrosion prevention; C. Material corrosion prevention and electrochemical corrosion prevention; D. Alkali injection into crude oil and material corrosion prevention. Questions are now being posed on a daily basis – I hope all moderators will take on the task of creating these questions! Reference answer: A A D B A