CHEMICAL ENGINEERING BOARD EXAM SAMPLE QUESTIONS - MAY 2016 Day1: Physical and Chemical Principles (30%) 1. Citric and malic acid: what do the y have in common? 2. Effect in mass number and atomic number of alpha emission 3. Nuclear fission 4. Who discovered radioactivity? 5. Definition of radioactivity 6. Who discovered vulcanized rubber? 7. Level of toxicity 1:heptachlor 2:dieldrum 3:DDT 4:Arsenic 5: Cr 8. Colligative Propeties: vapor pressure lowering and freezing point depression, kb and kf are not given 9. Given Pb and Uranium238, 0.3 g of lead and 1.7 g uranium, if t he half life of the latter is 4.5x10^ -9 years and assumimg that all the lead comes from the decay of uranium, ESTIMATE HOW OLD IS THE EARTH? :) 10. Definition of atomic mass unit 11. Collision Problem 12. Claussius Clapeyron - 2 problems 13. BOD Problem 14. COD Problem 14. Empirical and molecular formula 15. Balancing equations, iba wala sa choices 16. Balancing REDOX equations 17. Electrochemistry 18. Faradays Law 19. Reaction Kinetics problems, k and order of reaction, use linear regression, regre ssion, but answer is obvious sa choices, take note yung units ng k 20. Entropy 21. Enthalpy 22. Gibbs Energy 23. Half life 24. Common names (cumene) 25. Organic Chemistry Reaction 26. Use of EDTA 27. Air velocity at night and day, ano mas mabilis sa gabi o araw. 28. pH ng river after the air (acid rain) given depth at area. Hehehe Day3: General Engineering (30%) 1. Engineering Economy Concepts: Financial Analysis Cost Benefit Analysis Six-Tenths Rule Break-even 2. Physics: Rectlinear motion, optics, free fall, hertz of moving vehicles 3. Algebra: work and time problem 4. Probability: dice problem 5. Strength of materials 5 problems: flexural stress etc 6. Mechanics: beam, resultant force, vertical force, helical spring (good luck sa formula) 7. Integral Calculus: area and volume ng curve 8. Differential Calculus: rate problem ng funnel 9. Analytical Geometry: concepts ng parabola at hyperbola
10. Differential Equations Salt problem, half life 11. Enthalpy 12. Trigonometry: trigonometric functions, angle of elevation/depression, conversion of degree to radian 13. Lighting/striking. With a delay of time of 4s. Calculate the distance. :) 14. A velocity is increasing each second with constant acceleation, given v1 to v6, calculate the acceleration? 15. Concepts: intermediate beam, rche, ac celeration, costing analysis 16. Questions 80-100 ay linked problems, 3 questions each problem -inventory problem -accounting problem (total price per item, how m any units to break even) -probability (dice problem) -a ball is drop at the same time that a ball is thrown up. At what height and time will they meet? Given ang height and velocity ng ball thrown up -a tank with 4 lbs of salt per 100 gal of water. It is up with (given) lbs of salt per gal of water in 5 gal per min. It is drain in 5 gal per minute. Questions: (1) what is the mass rate being pumped in the tank? (2) how many lbs of salt? (3) what is the concentration in the tan after 10 min? DAY 2: Chemical Engineering (40%) Computations: 63 questions (21 problems) Concepts: 37 questions Total: 100 questions Linked Problems (3 questions each problem) 1. Single Effect Evaporation of NaOH with Boiling Point Rise Calculate Q, the amount of steam and the area of the evaporator. Given Ps, Tv, Hf and H. (Kayang masagutan kahit hindi isolve, masyado m atrabaho at mahaba ang solution tumingin sa mga graph at isolve, aksaya sa oras, dapat alam ang technique na gagawin para imbes halos 15 m ins isolve, wala pang 1min lang.) 2. Batch Distillation (Lagi ko example sa Separation Processes etong problem at sa review, using Rayleigh equation. Di na nila sinolve dahil memorize na ang answer.) Given a relative volatility of 4,600 mols of A and 400 mols of B are fed in a kettle for distillation. A is more volatile than B. 1) What is the amount of overhead product if the remaining mixture in the k ettle is 80%B? 2) How much A is in the overhead product? 3) If 50% of the feed evaporated, how much A remains in the kettle? 3. Membrane Separation (Electrodialysis) 4. Humidification - 6 questions Determine humidity, percentage humidity, dew point and the amount of w ater turn into vapor (condensation). Dapat marunong gumamit ng psychrometric chart. Pero di gamit ng gamit ng psychrometric chart, sa past che board exams naman, di 1 atm ang total pr essure tapos minsan di airwater given. 5. Chemical Reaction Engineering Energy Balance of Mixed Flow Reactor 6. Heat Transfer - 9 questions Forced Convection Heat Transfer Inside t he Pipes (one for laminar, one for turbulent) Heat Exchangers
Determine heat transfer coefficient of the bulk fluid and surface. 7. Thermodynamics - 18 questions Carnot Cycle (given rc etc.) Energy Balance (turbine) Entropy (calculate Q and S) Entropy with phase change. Given heat of fusion and heat of vaporization. Thermodynamic Properties of Air 8. Flow of Fluids - 6 questions Reynolds Number, Reynolds Number at Allowable Velocity, Pressure Drop per 100 ft pipe, Mechanical Energy Balance, Safety Velocity 9. ChE Calculations Carbon Dioxide Material Balance 10. Gas Absorption with Reaction Sulfuric Acid and SO3 Concepts: 1. Process Control (Integral Controller, PI, PID) 2. UNIFAC 3. Purpose of Multi Pass Heat Exchanger 4. Cooling of Batch Reactor 5. Importance of SCADA 6. Galvanic Corossion 7. Materials of Construction (Martensitic, Austenitic, Ferritic, Duplex) 8. What is used in ultrasonic flowmeters? 9. What is above the feed plate? Answer: rectifying 10. Membrane Separation 11. Refrigeration theory, bakit lumalamig ang ref? 12. Concept about wine opening. Bakit sumasabog pag binubuksan? 13. Thermodynamics Concepts Residual Enthalpy Entropy from PVT Correlations Equations of State Reduced pressure and reduced temperature 14. Yung vapor icocondense mo para magamit ulit sa operation and sometimes mas valuable pa sa mismong product Choices: evap, fractional distillation, membrane separation
