Wear and tear

Pockets or voids within a rock mass might be filled with finer material. These fines will be released during the dredging works. 

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Regenerative pyrolysis processing is very versatile it can handle varied feedstocks and produce a range of ethylene to acetylene. The acetylene content of the cracked gases is high and this assists purification. On the other hand, the plant is relatively expensive and requires considerable maintenance because of the wear and tear on the refractory of cycHc operation. 

Osteoarthritis, the most common arthritic disorder, affects some 30 million Americans each year. Caused by daily wear and tear on joints or injury, osteoarthritis is painful and restricts daily activity. It can affect the basal joint of the thumb, as well as the knee, hip, and other joints. 

Cyclic nature of Implement mechanical integrity program batch process (e.g.,, Design equipment for easy replacement start/stop, thermal cycling). Possibil- Consider demand of cycling while designing ity of mechanical equipment and controls wear and tear. Possible loss of containment. ... 

Uncertain wear and tear on equipment by unfamiliar materials or processing techniques Uncertain management practices by the toller... 

Slip-ring motors need a regular and meticulous check of brushes, brush holder unit and slip-rings for cleanliness, accurate contacts, brush curvature, wear and tear of slip-rings and arcing (Figure 10.5). The following procedure may be followed ... 

Brush lifting and short-circuiting devices can be employed for motors required to run continuously for a long period to minimize wear and tear of slip-rings and brushes. However, when speed control is required or switching operations are frequent, continuous contact brush gear assembly must be employed. 

The actual number of trays needed for a particular separation duty depends on the efficiency of the plate, and the packings if they are used. Thus, any factors that cause a decrease in tray efficiency will also change the performance of the colunm. Tray efficiencies are affected by such factors as fouling, wear and tear and corrosion, and the rates at which these occur depends on the properties of the liquids being processed. Thus the proper materials of construction must be selected for tray construction. 

The zippered bellows that protect the hydraulic piston against drippings should be checked for wear and tear. 

Fixed capital investments are characterized by the fact that they have to be replaced after a number of years commonly referred to as service life or useful life period. This replacement is not necessarily due to wear and tear of equipment. Other factors include technological advances that may render the equipment obsolete. Furthermore, over the usefiil life of the equipment, the plant should plan to recover the capital cost expenditure. In this regard, the notion of depreciation is useful. Depreciation or amortization is an annual allowance which is set aside to account for the wear, tear, and obsolescence of a process such that by the end of the useful life of the process, enough fund is accumulated to replace the process. The simplest method for determining depreciation is referred to as the straight line method in which... 

If primary control by the enclosure is under consideration, the extra wear and tear on electrode holding equipment by the escaping fume must be taken into account. This potential problem is particularly evident on ultra-high-power (UHP) furnaces where the holding equipment would be constantly exposed to high-temperature flame. As a possible solution, the furnace could be equipped with a roof-mounted water-coiled stub stack, which naturally draws fume from the furnace and into the enclosure. This approach would divert the fume and prevent damage to the electrode equipment. 

Bifurcated A fan in which the direct drive motor is separated from the airstream, reducing corrosion rare, allowing higher operating temperatures, and reducing wear and tear on bearings. 

Verschleiss, m. wear (and tear) retail, sale, verschleissen, v.t. wear out retail, verschleissfest, a. resistant to wear. Verschleissfestigkeit, /. resistance to wear, wearing qiiality. 

There is a clear correlation between quality or cost of materials and the durability/life expectancy of buildings. Greater resistance of better materials to wear and tear can be assumed, with obvious implications on future maintenance. Striking the best balance between initial capital outlay and maintenance cost requires complex calculations that take into account such intangibles as future interest rates and taxation of building operations. 

Combustion equipment can be set to give optimum efficiency at the time of commissioning but this condition will not be maintained. Wear and tear on control valves, partial blockage of filters, sooting of surfaces, etc. will all cause a fall in efficiency. To counter this, regular maintenance is desirable, and must include routine flue analysis and burner adjustment. 

From a practical review, perhaps it can be stated that buildings and construction materials are exposed to the most severe environments on earth, particularity when the long time factor is included. The environments include such conditions as temperature, ultraviolet, wind, snow, corrosion, hail, wear and tear, etc. Basically the following inherent potentials continue to be realized in different plastics ease of maintenance, light weight, flexibility of component design, combine with other materials, corrosion/abrasion/weather resistance, variety of colors and decorative appearance, multiplicity of form, ease of fabrication by mass production techniques, and total cost advantages (combinations of base materials, manufacture and installation). 

Use factors Normal wear and tear, abuse during installation, abuse by user application outside the designed use conditions... 

When vinyl is chosen for laboratory floor use, the heavier commercial grade is recommended over the thinner material often used in homes. The cushioned type, while easier to walk on, does not have sufficient ability to withstand laboratory wear and tear. Neither does the no-wax type. Good maintenance should include regular waxing, which will greatly increase the ability of any flooring to resist damage from wear and from chemical spills. 

In time, of course, it will suffer wear and tear and eventually become unusable. Its life will also be shortened by obsolescence, a very important factor. A 50 year old two-pan analytical balance, for example, may be in perfect working order, but its value is only that of an antique. The cost of equipment will also determine whether or not it should be capitalized. Rules for this will vary from one laboratory to another. 

Therapy interruptable by washing off application System removal inadvertent—wear and tear Delivery efficiency is low (only a small fraction of drug is delivered)... 

Catalysts were expensive, however, so the petroleum industry did not solve the problem of cheap, lead-free, knock-free gasoline until the 1970s, after General Motors adopted the catalytic converter. Lead compounds inactivate the catalysts, and sophisticated catalytic cracking techniques had to be developed to replace the fuel additive. Ironically, an even more difficult job was finding a substitute for the protective coating that tetraethyl lead formed on exhaust valve seats not even newly developed, extremely hard materials prevent wear and tear on them as well as tetraethyl lead did. 

In general, economic inefficiency in resource allocation would be the result of a divergence between private benefits or costs and social benefits or costs, i.e. the result of externalities. Private costs (or internal costs) are directly taken by the buyer. Private costs for a transport user would, for example, include expenses for wear and tear, energy cost of vehicle use, transport fares, taxes and charges, as well as welfare effects such as own time costs. 

Social costs reflect in this example all costs occurring from the provision and the use of transport infrastructure, such as wear and tear costs of infrastructure, capital costs, congestion costs, accident costs and environmental damage costs. Some of these costs are already indirectly included in the private costs through taxes and charges, while others are not. In the context of environmental economics, private and social aspects are of importance. Mainly since it is often the case that environmental degradation is a social cost caused by private activities. Hence, the distinction between private and social is as presented above another impact of costs not being properly internalized in prices. 

So high requirements on water- and dust proofness, design and wear and tear are very well fulfilled, because cout-outs are not necessary anymore. 

Wedge barriers have a quick response time (normally 3.5-10.5 seconds, but can be 1-3 seconds in emergency situations. Because emergency activation of the barrier causes more wear and tear on the system than does normal activation, it is recommended for use only in true emergency situations. Regular maintenance is needed to keep wedge fully operational. 

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