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Q. Describe Natural and Synthetic Sand?
Natural sand: A natural sand is the on which is available from natural deposits. Only assistive and water need to be added to it to make it satisfactory for moulding. The clay content of most natural sands is slightly higher than the desired so that new sand can be continuously added to the used sand to replenish that which is lost.
Synthetic sand: A synthetic sand is prepared by mixing a relatively clay free and having a specified type of clay binder as well as water and other additives. All are mixed in the foundry. This sand has the advantage that sand grains of specified composition and properties can be prepared on the basis of the metal being cast.
Battery Charger: As suggested by the name, it is used to charge a battery. The detailed procedure for charging a battery is given in later units. List the uses of following too
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kinetic Inversion In a mechanism, in a kinematic chain one of the links is fixed. One can get different mechanisms by fixing in different links in a kinematic chain. This techn
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A modified NRZ code known as enhanced-NRZ (E-NRZ) operates on 7-bit words; inverting bits 2,3,6 and 7; and adding one parity bit to each word. The parity bit is chosen to make the
Masonry Arch Culverts: Brick or stone masonry arches were very popular forms for culverts till recently. The disadvantage with this form is the unavoidable humps in the longi
modified soderberg line method
Q. Which functions used for coating? • Improves arc stability by providing certain chemical which have this ability, by ionizing the path of arc. • Provides a protective gaseou
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