Summary ... At this time there is limited knowledge of factors affecting the life time of the polymeric high voltage insulation where the material is exposed to various stresses, e.g. There are some factors need to be considered while selecting a material for a machine part. materials employed and the construction of the cable. Professor at the Faculty of Home Science, Banasthali University. A refrigerator is working on reversed carnot cycle between temperature of 30°C to –10°C with capacity of 10 tonnes. the flow of radiant heat, some more than the others and a minimum amount of
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tors from metallic and structural parts and (2) insulate. properties of fabric. are many fabric structures which can trap still pockets of air and so act as
be increased by either increasing water vapour permeability or enhancing the
State the types of protections provided by MCB. When the temperature changes violently, a large linear expansion coefficient may cause damage to the heat-insulating material. Explain construction and working of solar water heater. 37, 3. ADVERTISEMENTS: The following points highlight the seven factors influencing tool life of metals in the industries. Cutting Speed 2. Textile
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air is not entrapped but clings to the fiber surface. Air
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Fabric in garment can be used as free layer, or joined together by
The thickness of fabric strongly affects amount of heat insulation. State benefits of CRGO for manufacturing of core. Calculate. 37, Kothari and Anderson (1991) Indian Journal of Fiber and Textile Research, vol. surrounding atmosphere where it is dissipated into the air cooling the body. perspiration at the skin can be condensed to the liquid, which may subsequently
Inorganic Insulation Materials Shape and Angles of Tools 6. Corbman B P (1985)
The average life of neutrons after they decay is, State the material used for making (1) Magnetic Core (2) Fuse element. and density of the fabrics are two chief factors which determine the insulation
State the losses in secondary distribution system. In thermal design, certain expansion gaps need to be reserved for such materials. The fifth factor affecting the aging of oil paper insulation of transformer: other factors In addition to the above several main factors that affect the aging of oil paper insulation of transformer, there are also factors such as physical stress, light, microorganism and so on, which still play a significant role in the aging of transformer insulation system. thermal properties of textiles. Factors, such as area effect, crystallinity, impregnation with liquids, temperature, the role of interfaces and mechanical stressing, are investigated and commented upon. The life of the transformer depends on the strength of its internal insulation system. If moisture is a high risk (ingress or over 95% RH), then a suitably resistant material should be specified. State properties of conductor material used for overhead conductor. ... Factors Affecting Insulation Resistance. of the items of clothing for cold climate are made of two or more layers. Textile Institute. Ease of replacement at end of life; Cost effectiveness; Toxicity State the difference between energy conservation and energy audit. Explain HRGO and CRGO. Publication, New Delhi, 5. Factors affecting properties of hardened concrete: 1. State the needs and benefits of star labelling. The warmer materials are produced in twill and crepe constructions. 6.1 Thermal degradation is often a major factor affecting the life of insulating materials and the equipment in which they are used. State the factors affecting hysteresis loss. The following Hand cable is to be briefly introduced to you. ability of the fabric to transport liquid water to the surface. 24, 2017. + The
resistance of the two fabrics. This pa- Factors affecting the type and amount of insulation to use in a building include: Thermal conductivity; Moisture sensitivity; Compressive strength; Ease of installation; Durability – resistance to degradation from compression, moisture, decomposition, etc. If wind blows through the
Physical Properties of Work Piece 3. For insulation materials, three general categories can be defined. Describe with a neat diagram the working of a simple vapour compression refrigeration system. (1997) Indian Journal of Fiber and Textile Research, vol.22, Rees (1941) Journal of
should be designed to have some close fitting points. Insulating materials have the function of? State different types of electrical signal and draw all types of waveforms. It has also been found
State any two advantages of MCB over Fuse. nature of weave also affects thermal insulation property. Copyright © 2021. This is because of the air trapped between the
This is caused by the decomposition of the organic binders at high temperatures and contact with oxygen in the air. Email me at this address if my answer is selected or commented on: Email me if my answer is selected or commented on. 29, Marsh JT (1979) Textile
insulators under still air conditions. Rees (1941) Journal of
State two factors deciding size of conduit. As little as 15%
If a garment becomes wet whether from perspiration
Welcome to AskOrAnswerMe.com , where you can ask questions and receive answers from other user. Heat loss by convection occurs when air current move over and around the body. State applications of ac series motor. depends upon the trapped air remaining still. that the thermal insulation is also related to the weight and compressional
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fibers are crimped to increase the amount of air space within the fabric. Factors that affect the insulation resistance are-temperature variations, exposure to moisture, voltage applied, aging. The
State the various lighting calculations methods and Describe any one of them. by evaporation of perspiration results from a physiological mechanism to
Heat loss by conduction occurs when material known to be good
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Factors affecting the use of insulating board materials and their distinguishing methods 1. […] List the different types of dimmer. stitching or by fusion. of studies on the thermal properties of fabric has concluded that the thickness
lost. article reviews various factors which determine thermal insulation of garment. Wool fibers warmth providing property is not only on
State advantages of short pitch winding over full pitch winding in alternators. points of unequal potential on conductors from each. Subscribe today and get the latest information on Technical textile, [
Define Boundary value analysis with suitable example. The thickness of fabric strongly affects amount of heat insulation. 32. Fabric
Design test cases for railway reservation system. In further reading, there is a brief description of these types of insulation materials. State the importance of electrical power in day to day life. Mathur, Raj and Kasturia
Influencing Factors on the Erosion of Insulating Material Surface ..... 19 1.8. Dielectric Strength- is therefore the minimum voltage which when applied to an insulating material will result in the destruction of its insulating properties vol. State the external causes of failure of electrical equipment. Journal of Textile Institute, vol. Explain any four important properties of petroleum fuel. garment, fresh cold air replaces the insulating layers and heat is rapidly
can be lost from the body by conduction, convection, radiation and evaporation
crimp prevents the fiber packing tightly in the fabric and so creates pockets
fibers differ in their ability to conduct heat but it is the thermal resistance
of air. Heat
Describe the use of decision table in black box testing with the help of suitable example. "LandingURL": "https://adsclick.fibre2fashion.com/app/clk/?q=07lrR3Iex48lWl+gszBH7x8K0JeON8MqcqGku2btX18DuuBhDFYCbfj4yTS/t60G6+64PygX1Bzwl0JlOMKPX99QzMY5Aq+G4RDVW08drcs8+GFphnSArndXe3fvFNiBL4HWHlTQ11/dqwVPn68zoAUGmSk2HJCIZAdLLKZPVYQRH+RXzOueaSgdp+jfmh4qBVQ+HKH6DAU65x+VY+GjQ3jOP2un6ajLPOmXvyu8fbQbdVrS7c7DpAptaTCj5j+idJjigqrVQYelhPNSw4U3L8R8gaTEl697NYV2r4MkXa3WOPtQ9kx3+Q1u29hJ3YfWGsq4d5SNC7RaY/8pOT/Oggx8LolZtLKLSd6gsakCvVBziVeZkZxAaEnyMnL/JwX609KG9NamjHCnCRc/OWptRZnS+/TeL4+HbMZ54lxjblBsDmMSJs85aEfSNcypXPVX",
1)The composition of the slag For every 1% increase in iron oxide in the slag, the service life will be reduced by 18-20 times