Executive Summary The following is a thermal‚ mechanical and hydraulic design response report to a heat exchanger problem where ethylene glycol and a poor quality feed of water are put through a shell and tube exchanger with the objective of cooling the ethylene glycol feed. A shell and tube exchanger was chosen over several other exchangers due to its high efficient performance and its relative ease of maintenance in processing these fluids. From the data given and specific heat capacity researched
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officer take a paint sample from the exact part of the vehicle upon which the damage occurred. In reference to hit and run investigations‚ paint samples should be taken near the point of impact‚ but should not be taken from areas where there is corrosion or rust. This procedure can be done by the investigator by removing a painted section with a clean scalpel or knife blade. It is important for the knife or scraping instrument used to be clean in order to avoid any form of cross contamination
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Research Task: Metals By Megan Forbes 1. Gold Figure 1 Evidence of gold mines: Ancient Egyptian map showing roads to Nubian gold mines‚ dated 1400-1200 BC (Located in the Egyptian Museum in Turin‚ Italy) Figure 1 Evidence of gold mines: Ancient Egyptian map showing roads to Nubian gold mines‚ dated 1400-1200 BC (Located in the Egyptian Museum in Turin‚ Italy) Figure 2 Ancient Egyptian hieroglyphs depicting gold Figure 2 Ancient Egyptian hieroglyphs depicting gold i) Gold was no
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Section A Multiple choice (17 marks) Do NOT Write on this section of the paper. Answer ALL questions in the table provided at the start of Section B Question 1. Which of the following best describes the structure of metals? A lattice of A. alternating positive and negative ions B. positive ions surrounded by freely moving electrons C. molecules held together by covalent bonds D. atoms held together by covalent bonds Question 2. Which of the following is not a property of most metals
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early atmosphere - earth roughly 4 billion yrs old - created by volcanoes erupting + releasing gases - contained mostly co2 + water vapour - earth cooled + water vapour condensed to form oceans - co2 dissolved into oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest
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Machine and Equipment Monitoring Type of Maintenance | Advantage | Disadvantage | Corrective | 1. Good effectiveness | 1. Need expert | (Design-Out) | 2. Long life cycle of equipment | 2. High cost‚ and need time to study and develop equipment | Breakdown | 1. Good for equipment which is cheap and easy to fix | 1. No sign | (On-Failure) | 2. Used when the other types of maintenance cannot be used | 2. No planned shutdown | | | 3. Need inventory of parts | |
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promote energy saving of mining industry. The high-quality grinding ball produced by KAIYUAN COMPANY can be used in wet method in mine. In view of the mine wet mill mining conditions‚ the grinding ball shows good wear resistance‚ low broken rate and corrosion resistance. It can reduce the consumption of steel ball and save a lot of money for mining industry to have enough fund to invest in technology‚ equipment and products R&D. We are a professional manufacturer of GRINDING STEEL BALLS in China
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naturally in living organisms. The most important drawback using MEA is the resulting high energy consumption needed for separation. This is a side effect of the high absorption efficiency. Other problems with MEA are significant vapor losses and a high corrosion tendency. Another problem with amines in contact with exhaust gas is that it will have a tendency to degrade in presence of oxygen and other components like nitrogen oxides or Sulphur oxides. At low pressure‚ the driving force for separation is much
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Stone: They are very resistant‚ compact and durable. Currently construction is very expensive. They do not need much maintenance‚ since they are very well resistent weathering agents. Metallics: They are built quickly‚ are expensive and have corrosion as an against factor. Also‚ their maintenance is expensive. Concrete and steel: They allow varied designs‚ often support precast‚ they are resistant‚ and maintenance costs are low. The functions that bridges have are: Aqueduct: They are used
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resistant coating for fabrics. During WWII PVC quickly replaced traditional material to insulate wiring on military ships. During the 1950’s PVC became increasingly popular‚ and PVC became essential for industry; the plastic’s light‚ chemical and corrosion resistance made an optimal choice for building. Improvement made to temperatures resistance allowed for PVC to transport water to thousands of homes. Reference List: (This is not included in the word count) – I2 Dvorsky‚ George and Joseph Bennington-Castro
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