【Test Your Knowledge】Basic Chemical Engineering Knowledge (9)
Thread Content
1. For the same substance, the values of its latent heat of condensation and latent heat of vaporization are ______. A. Equal B. Greater than C. Less than D. No relation 2. For industrial production, the easiest way to increase the heat transfer coefficient is __. A. Change the process conditions B. Change the properties of the fluid C. Change the flow state of the fluid D. Other 3. For a shell-and-tube heat exchanger, according to the principles for selecting the fluid flow path, ____ should flow through the shell side. A. Fluid with high pressure B. Fluid with low flow rate C. Fluid with high viscosity D. Properties of the fluid 4. If the Reynolds number of water at 277 K is 3500, then the flow pattern of this fluid is ______. A. Laminar flow B. Transient flow C. Turbulent flow D. Obstructed flow 5. The actual compression process in a reciprocating compressor belongs to ______. A. Isothermal process B. Adiabatic process C. Polytropic process D. Isobaric process 6. _________ is the smallest particle in a chemical change. A. Molecule B. Atom C. Element D. Proton The answer will be posted on the first floor when it’s time; please stop posting similar requests for answers. This section is intended to liven up the forum and help everyone learn a little something along the way. Participate more, and you will naturally get higher scores for correct answers. It was shut down early! Many people got it right; it seems everyone is quite skilled. Answer key: 1A, 2C, 3C, 4B, 5C, 6B. Did you get them right? This post was last edited by zhangyong6404 on 2009-3-23 12:31.]
A.C,C,C,D,B
AACCCB is very uncertain:$
1.A (equal) 2.C (change in flow state) 3.BC (low flow rate, high viscosity) 4.B (transitional flow) 5.C (polytropic process) 6.B (atoms)
A,C,B,B,C,D
1.A 2.C 3.C 4.B 5.C 6.B
a c c b c b
1. For the same substance, the values of its latent heat of condensation and latent heat of vaporization are ____A__. A. Equal B. Greater than C. Less than D. No relation 2. For industrial production, the easiest way to increase the heat transfer coefficient is _C_. A. Change the process conditions B. Change the properties of the fluid C. Change the flow state of the fluid D. Others 3. For a shell-and-tube heat exchanger, according to the selection principle for fluid flow paths, _B__ should flow through the shell side. A. Fluid with high pressure B. Fluid with low flow rate C. Fluid with high viscosity D. Properties of the fluid. 4. The Reynolds number of water at 277 K is 3500; therefore, the flow type of this fluid is __B____. A. Laminar flow B. Transitional flow C. Turbulent flow D. Obstructed flow 5. The actual compression process in a reciprocating compressor belongs to ___C___. A. Isothermal process B. Adiabatic process C. Polytropic process D. Isobaric process 6. _____B____ is the smallest particle in chemical reactions. A. Molecule B. Atom C. Element D. Proton Question 3 is the most controversial; I think the answer should be B. Due to the baffles in the shell side, the fluid can reach a turbulent state at lower flow velocities, which helps to increase the heat transfer coefficient. Fluids under high pressure should flow in the tube side, as the shell structure is complex and its pressure-bearing capacity is relatively poor. Fluids with high viscosity tend to stick to the walls, which makes cleaning difficult; therefore, it is also best for them to flow through the tube side. There’s another suggestion for the moderators: when revealing the answers, could they also explain the reasoning behind those answers to the questions that are subject to debate? After all, the goal of this activity is to help people learn real things, right?
1.A 2.B 3.C 4.B 5.C 6.B
A C C B C B
1. For the same substance, the values of its latent heat of condensation and latent heat of vaporization are _A______. A. Equal B. Greater than C. Less than D. No relation 2. For industrial production, the easiest way to increase the heat transfer coefficient is _C_. A. Change the process conditions B. Change the properties of the fluid C. Change the flow state of the fluid D. Others 3. For a shell-and-tube heat exchanger, according to the principles for selecting the flow path of the fluids, __B__ should flow through the shell side. A. Fluid with high pressure B. Fluid with low flow rate C. Fluid with high viscosity D. Properties of the fluid. 4. The Reynolds number of water at 277 K is 3500; therefore, the type of flow for this fluid is ___B___. A. Laminar flow B. Transient flow C. Turbulent flow D. Obstructed flow 5. The actual compression process in a reciprocating compressor belongs to ____C__. A. Isothermal process B. Adiabatic process C. Polytropic process D. Isobaric process 6. _______D__ is the smallest particle in chemical reactions. A. Molecule B. Atom C. Element D. Proton
1A 2C 3C 4B 5C 6B
1.A 2.C 3.C 4.B 5.D 6.B It’s really hard to tell. Last edited by 497281664 on 2009-3-23 00:13]
A, C, C, B, B, B
1. For the same substance, the values of its latent heat of condensation and latent heat of vaporization are ___A___. A. Equal B. Greater than C. Less than D. No relation 2. For industrial production, the easiest way to increase the heat transfer coefficient is _C_. A. Change the process conditions B. Change the properties of the fluid C. Change the flow state of the fluid D. Others 3. For a shell-and-tube heat exchanger, according to the principles for selecting the fluid flow path, ___B_ should flow through the shell side. A. Fluid with high pressure B. Fluid with low flow rate C. Fluid with high viscosity D. Properties of the fluid. 4. The Reynolds number of water at 277 K is 3500; therefore, the type of flow for this fluid is ____B__. A. Laminar flow B. Transitional flow C. Turbulent flow D. Obstructed flow 5. The actual compression process in a reciprocating compressor belongs to ___C___. A. Isothermal process B. Adiabatic process C. Polytropic process D. Isobaric process 6. _____D____ is the smallest particle in chemical reactions. A. Molecule B. Atom C. Element D. Proton
The answer is A C D B B A (How could it be B? Since chemical reactions are emphasized, it should be molecules)
A C C C C B Right after graduation: L Forgot a lot
a,c,c,c,c,b Last edited by wbp on 2009-3-23 07:31 ]
1、A 2、C 3、B 4、B 5、B 6、B
1A 2C 3C 4B 5C 6B Really need to go through the book carefully
D D C A A B