the disadvantages of pool ionization | home guides | sf gate,in general, the greater the volume of water in the pool, the longer the ionization process. an ionizer's voltage is also a factor; high-voltage systems operate more rapidly. it can take several.6 advantages and disadvantages of coordinate measuring,list of disadvantages of a coordinate measuring machine. 1. there is no standardization yet. today, there are hundreds of different kinds of cmms, dozens of manufacturers, and various software programs to run the machines. this means that it is more difficult to interchange software between coordinate measuring machines. 2..
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hardness of work material in vickers hardness. •cemented carbide tool can process work materials up to 30hrc. processing 40hrc is a little difficult. high-speed steel tool is not possible to process hardened steels.2500 coating (cover the hardness of tool material) if coated tools need x4 harder than work material... •40hrc hardened steels
we can remove this hardness by treating the water with washing soda. insoluble carbonates are formed when washing soda reacts with the sulphide and chloride salts of magnesium and calcium and thus, hard water is converted to soft water. disadvantages of hardness. wastage of soap; wastage of fuel; formation of scales on metallic boilers.
disadvantages. high capital investment (however, the investment will be dependent on the degree of automation built into the equipment) only certain steels can be induction hardened the method is restricted to components having a shape that is suitable for induction hardening. do not be under any illusion that the process is distortion-free.
comparing the above two fig 4.1 and 4.2 , it can be seen that fig 4.2 has an optimum hardness value of 6.5 whereas that for fig 4.1 has a hardness value of 3.75 .in a similar fashion there is a difference in the values of optimum disintegration time too with fig 4.2 showing higher disintegration time in comparison to that showed by fig 4.1.this difference in the optimum hardness value is due to the
copper pipes: disadvantages. although copper pipes are superior in almost all ways to galvanized steel pipes, there are places were pex and cpvc pipes surpasses copper. although copper costs less the steel, it costs more than plastic.
(5) heating equipment can be installed in the mechanical processing production line, easy to realize mechanization and automation, easy to manage, and can reduce the transportation, saving manpower, improve production efficiency. ⑥ hardened layer martensite smaller, hardness, strength, toughness, are higher. ⑦ surface hardening of the workpiece surface greater compression internal
when hard water is boiled at home or in industries, it leaves deposits of calcium and magnesium salts in kettles, hot-water pipes, boilers and radiators. these deposits reduce the efficiency of boilers, kettles and pipes and can cause blockages and even bursting of the boilers.
but before you go ahead and use one, you should know the pros and cons of this gadget first. this article might let you see that penis pumping performed inappropriately may prove to give you far more problems than pleasure. penis pumps can be dangerous if used improperly. listed below are just few of the disadvantages of penis pumping: #1.
other cons of penile implants include: outpatient procedure, which involves recovery time at home. higher chance of malfunction with the two or three-piece device. less rigid erections (with the one-piece) constant pressure on the penis (with the one-piece), which may cause injury in certain kinds of patients.
hard rolls that have high gauge bands next to low gauge bands will produce a roll defect known as corrugations or rope marks in the rolls. slight defects of these types will not be noticeable in a wound roll if sufficient air is wound into the roll in the low areas and the web is not stretched over the high areas.
knoop hardness test. this micro hardness test is employed on miniature material feature that cannot be put on test by other methods. it uses a testing load of 1 kg or less. just like the brinell hardness test, the knoop is performed by applying force to an
it’s important to note that most of the “cons” on this list present only a very small risk, no greater than the risk encountered in eating meats or grains. and most experts agree that the benefits are significant enough to outweigh them. main risks related to insect consumption. allergens; bacteria; anti-nutrients; pesticides; toxins
problem 8: overwhelmed with work. many firms hire lesser interns than required and put up the entire work load on the few. if you happen to join such firms, you will feel overwhelmed to be trusted with so much work when you aren’t even familiar to working in a professional setting.
england a-level downgrades hit pupils from disadvantaged areas hardest this article is more than 9 months old analysis also shows pupils at private schools benefited most from algorithm
if one pin is left, the pros are efficient at knocking it down. when it’s just pin no. 3 (second row, on the right) the pros converted it at a rate of 97.7 percent.
18. why is hardness of water expressed in terms of calcium carbonate equivalent? 19. mention the disadvantages of hard water for industrial purpose. 20. list the methods of determining hardness of water. 21. what is the significance of this experiment?
record the number of drops of soap needed to make a lather. the greater the number of drops needed to make a stable lather, the harder the water. to separate temporary and permanent hard water
the pros and cons of differentiated instruction can certainly be helpful in small classroom environments. it may not be possible for this type of learning to happen in large scale classrooms. by evaluating these key points, each school district can decide if this is a
disadvantages: low-carbon steels suffer from yield-point runout and mild steel has a relatively low tensile strength. applications: medium carbon is used for large parts, forging and automotive components. high-carbon steel is used for springs and high-strength wires.
these disadvantages had a negative impact on both american and mexican workers and even the environment. u.s. jobs were lost since labor is cheaper in mexico, many manufacturing industries withdrew part of their production from the high-cost united states.
these arborvitae disadvantages need to also be considered. arborvitae can be sensitive – a major draw for arborvitae is that they are low maintenance, but this is
2. determination of total hardness repeat the above titration method for sample hard water instead of standard hard water. let the burette reading of edta be v 3 ml. 3. determination of permanent hardness take 100 ml of sample hard water in 250 ml beaker. boil it to remove temporary hardness to about half of this volume and cool to room temperature.
having tested our water today our total hardness is >21, carbonate hardness is 20, ph 8. we live in a very hard water area. our tank is fresh water and planted. we have tropical fish and a temperature of 24 degrees. we have lost 5 of our 7 cardinal tetras over the last few weeks. nitrite and nitrate levels are within the acceptable range.
poor management of hardness levels will lead to boiler and equipment breakdowns, exaggerated fuel costs, lost production and graying caused by the unremoved hardness neutralizing the detergent. hard water leaves lime scale deposits on washing and finishing equipment.