Teacher: Write a phrase, the answer to which is present in the passage. The answer to this question should be completely and unambiguously found in the passage. The query must be about a single or multiple linked entities. 
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Most people should get all the nutrients they need by having a varied and balanced diet, although some few people may need to take extra supplements. What this guide covers This guide has information about: Bonus: Like potassium, calcium helps regulate blood pressure. On your plate: milk (and other dairy products), spinach, beans and calcium-fortified products. 4. Magnesium: One of the most underrated minerals, magnesium is involved in over 300 chemical reactions in your body. other vitamins and minerals – including beta-carotene, copper, potassium and zinc ; Use these links to find out what these nutrients do, how much of them you need, how to ensure you get enough, and what the risks are if you take too much. Additional information. There are separate pages on: vitamins for children Vitamins and minerals. vitamins-minerals Vitamin A. vitamins-minerals B vitamins and folic acid. vitamins-minerals Vitamin C. vitamins-minerals Vitamin D. vitamins-minerals Vitamin E. vitamins-minerals Vitamin K. vitamins-minerals Calcium. There are separate pages on: 1  vitamins for children. 2  vitamins, supplements and nutrition in pregnancy. 3  fluoride. The 5 Minerals You Really Need ... and How to Add Them to Your Diet. According to Nobel Prize-winner Dr. Linus Pauling, you can trace every health ailment to a mineral deficiency. Who knew?Stress, for example, robs your body of magnesium. An iron deficiency can make you feel lethargic -- and compromise your immunity. On your plate: bananas, baked potatoes, raisins, tomatoes and artichokes. 1  3. Calcium: Sure, calcium helps build strong bones, but it also helps prevent PMS (a welcome side effect for women everywhere). 2  4. Magnesium: One of the most underrated minerals, magnesium is involved in over 300 chemical reactions in your body. other vitamins and minerals – including beta-carotene, copper, potassium and zinc Use these links to find out what these nutrients do, how much of them you need, how to ensure you get enough, and what the risks are if you take too much. Vitamins and minerals are nutrients your body needs in small amounts to work properly and stay healthy. Most people should get all the nutrients they need by having a varied and balanced diet, although some few people may need to take extra supplements. What this guide covers. This guide has information about: vitamin A B vitamins and folic acid So which minerals do you need, and how do you add them to your diet? Minerals are incredibly important for health and to prevent chronic disease. Without them we'd suffer from osteoporosis, PMS, high blood pressure and low energy, just to name a few, says Karen Ansel, a registered dietitian in New York.
Solution: the importance of minerals in diet
Reason: The passage is about the importance of nutrients in a diet. This includes minerals, and hence, the question of importance of minerals can be answered from the information in the passage.

Now, solve this instance: It can take two forms: caustic gouging or caustic cracking, also called caustic embrittlement. Caustic attack or caustic corrosion, is often encountered in phosphate treated boilers in which deposits of phosphates or other ‘scale’ occur in high heat transfer areas. Boiler water can permeate the porous deposit resulting in localize corrosion. #5. Boiler water pH and PO4 levels need to be in balance, a balance moreover that depends on the operating pressure. In the drum the concentration of chemicals is usually higher than in the boiler feedwater, especially for those (added) compounds that aren't taken out by the steam. water treatment, causing highly alkaline conditions. In boilers, the source of this corrosion is excessive use of hydrazine, or leaking internal de-super-heater elements in boiler drums, which allow alkaline Phosphates-dispersants, polyphosphates-dispersants (softening chemicals): reacting with the alkalinity of boiler water, these products neutralize the hardness of water by forming tricalcium phosphate, and insoluble compound that can be disposed and blow down on a continuous basis or periodically through the bottom of the boiler. Boiler water carryover. Boiler water carryover is the contamination of steam with boiler water solids. Common causes of boiler water carryover are: Bubbles or foam form on the surface of the boiler water and leave with the steam. This is due to high concentrations of insoluble or soluble solids in the boiler water. Criteria: The following criteria for total phosphorus were recommended by US EPA (1986): 1  1. no more than 0.1 mg/L for streams which do not empty into reservoirs, 2  2. no more than 0.05 mg/L for streams discharging into reservoirs, and. 3  3. no more than 0.025 mg/L for reservoirs. Boiler water. Boiler water is the liquid phase of steam within a boiler. The term may also be applied to raw water intended for use in boilers, treated boiler feedwater, steam condensate being returned to a boiler, or boiler blowdown being removed from a boiler. Ph And Phosphate Concentration In Bfw And Steam Drum - posted in Industrial Professionals: Boiler feed water (BFW) pH is to be maintained in the range of 8.0 to 9.5(guidelines) where as in steam drum pH maintaining guidelines is in the range of 9.5 to 11.0. Pressure of steam drum is 34 barg. In general, softening chemicals (phosphates, soda ash, caustic, etc.) are added directly to the fee-water at a point near the entrance to the boiler drum. They may also be fed through a separate line discharging in the feed-water drum of the boiler. Boiler Feedwater Treatment (Part I): Why Water Treatment is Necessary Contents. Water for boilers; Impurities in water; Boiler feedwater; Purity requirements of feedwater; Boiler deposits; Corrosion; Boiler water carryover; Water for boilers. All natural waters contain varying amounts of suspended and dissolved matter as well as dissolved gases.
Student:
effect of phosphate in boiler water