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2012 Registered Chemical Engineer Professional Foundation Exam (Afternoon): 31 questions in total. 2012 Registered Chemical Engineer Professional Foundation Exam (Afternoon): 31 questions.doc (44.5 KB, Downloads: 421) 1. In a cyclic process, ΔG ( ) A > 0 B < 0 C = 0 D Cannot be determined 2. In which of the following processes is entropy equal to zero? A Reversible isothermal process B Irreversible isothermal process C Reversible adiabatic process D Irreversible adiabatic process 3. In a Zn/Cu galvanic cell, increasing the H+ concentration will cause the Cu electrode potential to ( ) A Increase B Decrease C Remain unchanged D Cannot be determined 4. A pump is used to transport liquid with p=100 kPa and ρ=996 kg/m3. The saturated vapor pressure of this liquid at that temperature is pv=1.25 kPa. There are 11.5 kPa of losses in the suction pipeline, and the pump is installed at a height of 3.4 m. What is the NPSH? A 4.9 m B -2.3 m C 5.2 m 5. For a pipe, the characteristic equation is He=1.2*10-3Qe2. If the flow rate through the pipe increases by 20%, by how much times will the shaft power increase? A、2 B、1.3m C、1.7m 6、Given that the length*width*height of the plate and frame filter is 810*810*210 mm, with 10 plates in total, what is the filtering area of this filter? D、13.1m 7、Which of the following parameters cannot be determined for non-spherical particles? A、Surface area, equivalent diameter B、Sphericity, equivalent diameter C、Sphericity, volume 8、What is the difference between heat transfer in a cylindrical wall and heat transfer in a flat surface? A、The heat transfer flux is different 9、Given the flow rate, specific heat capacity, and temperature difference of the liquid to be heated, as well as the specific heat capacity and temperature difference of the heating medium, determine the flow rate of the heating medium. 10、What is the correct formula for Newton’s law of cooling? A、Q= B、Q= 11、In countercurrent, cross-current, and co-current flow, in what order is the temperature difference? (Countercurrent > Cross-current > Co-current) 12、Given the pressure and temperature of a gas, determine the molar volume (I forgot the answer; use the formula pVm=RT). 13、Given y1, Y2, and Y=mX, and knowing that the actual liquid-to-gas ratio is 1.52 times the minimum possible liquid-to-gas ratio, determine the actual liquid-to-gas ratio. (Refer to the textbook and derive the formula by yourself.) 14. Given the gas phase composition y and the liquid phase composition x, determine the relative volatility. (The numbers are also remembered.) 15. Given the feed rates F, W, and q=1.26, as well as R=3.1, determine the liquid flow rate in the stripping section. 16. In a distillation column, given xD, the reflux ratio R, the feed composition xF, and the relative volatility α, with the condenser being a total condenser, determine the liquid-phase composition leaving the second tray (the top of the column being the first theoretical tray). 17. How many distillation towers are required to completely separate ABCDE? () A、2 B、3 C、4 D、5 18. Given the tower diameter and fluid flow rate, determine the spray density. 19. Add 100 kg of water for the extraction of A. The initial liquid contained 50 kg of A and an equal amount of B. Given the values of xA, yA, xB, and yB after extraction, determine the extract phase E. （）20. Given xA, yA,xB, yB in extraction, determine the distribution coefficient and selectivity coefficient. 21. Original question 12-42. 22. Which of the following statements regarding the principles for selecting a factory location is incorrect? ( ) A. The factory location can be chosen upstream of rivers. 23. There are several horizontal storage tanks; which of the following statements is incorrect? ( ) A. They should be placed upstream of the lowest point in the factory area. B. They should be kept at a distance of 50 meters from Class A substances. 24. Production cost equals A. Direct production costs + fixed costs + administrative expenses + selling expenses (please check the details again). 25. How many levels of noise does there are in cities? (D) A、2 B、3 C、4 D、5 26. If the sound level increases from 40 dB to 80 dB, by how many times does the intensity of the sound become? A、2 B、20 C、102 D、10427. For a solution with positive deviation, what is the relationship between the gas phase composition y1 at the highest point and the liquid phase composition x1? A y1 > x1 B y1 = x1 C y1 < x128. The cubic equation of state is one that can be applied to both the gas phase and the liquid phase; there are multiple-choice questions related to this in the critical state, so it’s important to be familiar with this formula. Additionally, the thermodynamics section also involves calculating activity coefficients; be careful when performing complex multiplications. There are quite a lot of questions related to thermodynamics, and it’s far from enough to rely solely on the reference books from Tianjin University. 29. What measures should be taken regarding some old enterprises that cause significant pollution and consume a lot of energy? A. Eliminate B. Transform 30. When a factory releases large amounts of toxic organic substances, in addition to informing the victims, it should also report to ( ). A. Public security agencies B. Environmental protection bureaus C. Environmental administration departments 31. Solid waste should be classified according to (?) A. Toxicity level B. Type C. Characteristics. For calculating the liquid phase load of the spray, the diameter seems to be 800 mm; a liquid phase flow rate is also provided. There is an issue related to the moisture at dry equilibrium, with options including bound water and unbound water~~~