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Chemical Engineering
Chemical Engineering is the branch of engineering that deals with the technology of large-scale chemical production and the manufacture of products through chemical processes. Today, the field of chemical engineering is a diverse one, covering areas from biotechnology and nanotechnology to mineral processing.
1,464 Questions
What is the relationship between boilup ratio and number of contact stages?
The boilup ratio will help determine the bottom operating line of your column. Once you have both your bottom and top operating lines you can step off the number of stages (given the desired compositions at the top and bottom of your column).
What are arguments of DNA fingerprinting?
that is is good because it can solve many murders and serve justice to those
bad because it may be used to discriminate against people with inferior genetics.
Why do you use a 400 series stainless steel?
Unlike the 300 series stainless 400 series stainless can be hardened by heat giving moderate corrosion resistance with more durability than 300 series stainless. It is commonly used in pump shafts for equipment requiring a higher torque spec than 316 SS can provide
What is the thermal diffusivity of polypropylene?
Thermal diffusivity is the density divided by the specific heat of a substance. The TD of polypropylene is around 0.096 meters squared per second.
The Graetz number is {(Diameter/Length)*Reynolds#*Prandtl#}^(1/3)
It is used to characterize the thermal development of pipe flow: if the Graetz number is less than 1000, the thermal profile is fully developed.
What subjects at A-level do you study if you want to study civil engineering at university?
Maths is a must. Physics is also a very good idea since engineering in general deals with the weights, lengths and its effects etc.
What makes an electric arc furnace electrode break?
Electrode are some times broken due to: -
1) Electrodes making contact with a none metallic object as they are being hard pressed and ultimately broken. Electronic instruments are available to find this condition and take corrective measures to avert breakage of electrodes.
2) Scrap falling against the electrode(also known as scrap cave-in or collapse)
Above conditions are applicable for EAF
3) Electrode breaking at joints due to incorrect jointing (Not having the correct torque applied to the sections being jointed)
4) Rough handling prior to being used (While being moved or stored)
5) If thermosetting thead lock are missing due to some reason or other,the same mishap may happen.
6) Thread may have some entrapped external material which in turn damage the thread while torquing.
7) If phase sequence is not correct, electrode will be loosened from the joint and may fall in the molten metal.
vipin@vaibhavfurnaces.com
What is the operational temperature and pressure of deethanizer?
Usually conventional Deethanizers operates around 26-30 bar and 40 deg C.
Why is phenol formaldehyde used?
Phenol formaldehyde adhesives are generally hot press adhesives used extensively in the manufacture of plywood and other wood products such as flakeboard, oriented strand board and laminated veneer lumber. The reason it dominates this market is its relatively low cost, ability to achieve high quality bonds rapidly with the application of heat, and for its durability that equals or exceeds wood, when exposed to severe service environments.
What are the characteristics of titanium?
Answer Titanium is a great alternative for structural material in terms of weight and strength. Titanium is lighter than Steel and much stronger than Aluminum. It has a low heat transfer rate, which makes it useful for high-heat applications. The one major draw-back with titanium is that it retains heat during maching of part during manufacture due to its low heat transfer rate. Titanium has to be machined at 1/5 the rate of steel, even with plenty of coolant applied to the cutting tool. This is one reason a Titanium part is more expensive; if it takes 5 times longer to machine a part, it will be 5 times more costly. The other reason is that Russia has a monopoly on the titanuium resources. Someone asked me which part would be lighter if made for the same load: Steel, Titanium or ALuminum. I analyzed a simple rod under an axial load and determined the minium size of the optimized rod then calculated its weight. The Titanium rod came out 1/3 lighter than the Steel rod. For bending or other load applications, this ratio will vary. The strength ratio can easily be found by ratioing the Young's Moduls and the unit weight. Fatigue-- A few years ago, Titanium did not have very good fatigue properties. The standard titanium alloy was Titanium 6Al-4V. The fatigue S/N curve of this alloy is very steep; it does not flatten out at the higher cycles as Steel S/N curves will do. However, new alloys have been developed that have much better fatigue properties.
What is Solid Abrasive Material?
A solid abrasive material is a mineral which can wear away part of another solid by rubbing. A common solid abrasive is diamond.
bubble gum,marshmellow and sheep pigs than are deep fried is pottato sald with nose hair and road kill
It is a good low temp gas to replace R12. Also known as 401A is a blend of refrigerants (22-152A-124). It is a good low temp gas to replace R12. Also known as 401A is a blend of refrigerants (22-152A-124).
Whayt is the definition of Non halogenated volatiles?
The definition of non-halogenated volatiles is a compound where a halogen is not attached. They are mainly analysed based on their solubility in water.Ê
How will you control the temperature of an endothermic reaction in a mixed reactor?
Studies indicate the best way to control the temperature of the endothermic reaction in a mixed reactor is through making adjustments to the coolant temperature. There processes are highly complex.
Condition N is a symbol for normalized steel. It is often used in sheet steel applications in the aircraft industry. It can be shipped rolled.
What personality type are best suited for engineers?
Answer I'm not a psycologist but engineers are usually logical, conservative and focus on details.
The liquid formed by the condensation of a vapor; in steam heating, water is condensed from steam; in air conditioning, water is extracted from air.
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Why is there ice on the small line of a ac system?
its the gas flowing into your unit that produces the cold air the gas is cold so your pipe slightly freezes
Can you change a central unit from freon 22 to 134a?
the straight easy answer is no. Although,I guess id one really wanted to,you could change the compressor oil,Expansion valve,& basically re-engineer the system you could. But as far as removing the R-22,& recharcing with R134A,definately no.the temperature to pressure relationship is way different in the 2 refrigerants(with 134A running at a lower temp & pressure vs. r-22)
