Basic Biochemical Engineering Test Questions

Thread Content

I. Fill in the blanks 1. Characteristics of microorganisms: wide distribution, rapid growth, _, _, _, _, and strong metabolic capacity. 2. Nutrient elements for microorganisms: , , , , . 3. The filtration rate refers to . 4. Microorganisms, classified by type, mainly include: protozoa, actinomycetes, mycoplasmas, rickettsiae, viruses, etc. 5. The growth patterns of microbial populations, including: , , , . 6. The driving force for solid-liquid phase separation using a plate and frame filter is: . 7. The UASB anaerobic reactor is divided from top to bottom into a clarification zone, , 8. The basic modes of heat transfer are , , and three types. 9. Complete and balance the following equations. (1) H2S + Cl2 = (2) Fe + H2SO4 = 10. The impellers of centrifugal pumps come in three types: , and . II. Multiple-choice questions: 1. Which part of the flame has the highest temperature when using an alcohol lamp? ( ) A. Inner flame B. Middle flame C. Outer flame 2. During the different stages of bacterial growth, the period during which Bacillus can form spores is ( ) A. Stationary phase B. Logarithmic phase C. Equilibrium phase D. Death phase 3. The process used for the anaerobic treatment of organic wastewater is ( ) A. Methane fermentation B. Activated sludge C. Biological filter D. Oxidation pond 4. Drying is a ( ) process. A. Mass transfer ； B. Heat transfer ； C. Heat and mass transfer. 5. Among the following types of heat exchangers, which one has a higher heat transfer coefficient? （） ； What can be used in high-temperature and high-pressure environments is (). A. Tubular type B. Shell-and-tube type C. Plate type 6. In steady-state variable-temperature heat transfer, the flow direction of the fluid should be chosen as () to achieve the maximum average temperature difference for heat transfer. A. Co-current B. Counter-current C. Cross-current 7. When the valve on the pipeline is closed, its resistance coefficient (). A. Become smaller B. Become larger C. Remain unchanged 8. The temperature of saturated steam at 0.1 MPa is ( ) A 113.0℃ B 116.6℃ C 120.2℃ D 127.2℃ 9. The ISO 14000 series of standards are system standards developed by ISO/TC207, the 207th technical committee of the International Organization for Standardization (ISO). A Human Resource Management B Equipment Management C Environmental Management D Quality Management III. True or False 1. All substances in organisms that possess catalytic capabilities are proteins. （） 2. All enzymes have coenzymes or prosthetic groups. () 3. DNA is the genetic material of organisms, whereas RNA is not. （） 4. Biological oxidation can only take place in the presence of oxygen. （） 5. When the substrate is at saturation level, the rate of the enzymatic reaction is proportional to the enzyme concentration. （） 6. Water softening refers to reducing the concentration of calcium and magnesium ions in water. （） 7. The use of a catalyst can increase the rate of the forward reaction while slowing down the rate of the reverse reaction. （） IV. Short-answer Questions 1. What are the physical properties of sulfuric acid? What are the procedures for dealing with sulfuric acid burn accidents? 2. What is the working principle of a centrifugal pump? 3. What is the air locking phenomenon in centrifugal pumps? 4. Concept of filtration operations 5. Definition of microorganisms V. Calculation problems 1. The flow meter that supplies steam from the main air tank in the production area to a branch pipe leading to a certain factory shows that 1000×103 M3 of steam has been supplied over the past 5 hours; the steam is saturated at 0.5 MPa (gauge pressure), and its quality remains unchanged throughout the supply process. Please calculate the steam supply in tons and the hourly steam consumption of the production branch plant. (The density of saturated steam at 0.5 MPa is 2.667 kg/m3)