Was the Certified Chemical Engineer exam in 2016 and 2017 meant to be part of this entire event?
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The exams in 2017 are now over, and while everyone still has some memories of them, perhaps it’s time to organize an activity to help people recall those actual exam questions. By the way, is it possible to offer a reward for creating an electronic version of the real exam questions from 2016? The real exam questions from 2016 – those sold as study materials have a dark background that’s really disgusting.
1. Moisture with a content of 0.006 kg of water per kg of dry air is heated to 90°C and sent into a dryer to dry the material; the temperature of the hot air at the outlet is 60°C. Assuming that the drying process is an ideal one, what is the amount of hot air required to evaporate 1 kg of water? A 52 B 65 C 45 D 105 2. The operating pressure of a direct-cooling atmospheric condenser is 22 KPa (A); the temperature of the air at the outlet is 34°C. What is the temperature of the water at the outlet? 40°C, with a leakage rate of 50 kg/h into dry air. It is known that at 40°C, the saturated vapor pressure of water is 7.384 KPa, and the gas can be considered an ideal gas. What is the volume flow rate at the outlet of the condenser in Nm3/h? A 116 B 48 C 114 D 29. 3. In a methanol-water feed under atmospheric pressure, methanol constitutes 46% by mole fraction. The desired methanol recovery rate is 92%, and 98% of the methanol should be present in the top distillate. The heat input to the cold feed is q = 1.25, and the operating reflux ratio is 2.2. If direct steam heating is used, what is the ratio S/F of the steam input to the feed amount? A 0.57 B 0.92 C 1.25 D 1.63
As shown in the attached diagram, the liquid density at the reboiler inlet is 750 kg/m3, while the density of the liquid-steam mixture at the outlet is 75 kg/m3. The frictional pressure drop in the reboiler inlet line is 0.5 m of liquid column, the frictional pressure drop in the reboiler outlet line is 1.5 m of liquid column, and the frictional pressure drop on the shell side of the reboiler is 0.1 m of liquid column. The diameter D of the reboiler shell is 600 mm, while the liquid level height in the tower bottom is H2 = 1000 mm and H3 = 1500 mm. What is the minimum installation height H1 (mm) of the reboiler? Tip: The liquid density at the shell side of the reboiler can be calculated by taking the average of the densities at its inlet and outlet. (A) 310 (B) 710 (C) 1000 (D) 1585 attach://1290891.jpg
The container is placed on a 8-meter-high suspended platform. Its diameter is 2.6 m, and the length of its cylindrical section is 3 m. The liquid level inside the container is 2.4 m above the tangent line to the container’s head; the tangent line to the head is located 2 m away from the platform. What is the wetted area in the event of a fire?
The mass flow rate of the combustible gas in the flare is 100,000 kg/s, and its density is 1.8 kg/m3. What is the diameter of the flare?
The proposal is really good; it’s a shame the management hasn’t responded
The number of candidates taking the chemical engineering exam is decreasing, which indicates that they are opting for other exams instead. In Shaanxi, there were only 100 candidates; a few of them did not show up. In Shanghai, there were 300 candidates, with one-third of them absent from the exam. It is estimated that the total number of candidates taking this exam nationwide is around 3,000. Many candidates prefer to take exams related to construction and cost estimation, as the chemical engineering exam is very difficult – the concepts of heat, mass, and momentum transfer along with reaction processes are quite complex.
In favor; it seems there’s no chance this year. The questions and summaries should be organized while they’re still fresh in memory
There are even fewer in Chongqing: 30 in total, with 6 who were absent from the exam
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