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q can you implement compatibility test this test indicates the decrease in height of a mass of sand in a specimen tube with respect to its original
q what is shatter testshatter test this test is measure of toughness of the moulding sand it indicates the capacity of the moulding sand to with
q how can you test hardness of the prepared mouldhardness test the hardness of the prepared mould surface is tested to check the ramming density of
strength tests these tests are carried out to check the holding powers of various binders used in green moulding sand dry moulding sand and core sand
q determine the size of grains using fineness test of sandfineness test fineness test of sand specimen determines the size of grains and the
q how can you implement permeability test as already defined permeability of porosity of the moulding sand is the message of its ability to
q illustrate clay content testunder this test the clay content is measured by washing it off the sand sample the standard dried sand sample 50 gm is
explain the activitated sludge aeration tankthe activated sludge treatment process is a biochemical oxidation process organic solids are stabilized
a wastewater plant is operating at 10mgd with a suspended solids concentration of 200mgl it has 6 clarifiers operating in parallel each clarifier is
q illustrate moisture content test moisture content test moisture is an important constituent of moulding sand its content in the moulding sand can
q what are the basic use of sand rammerit is the apparatus of make specimens of moulding sand for tests such as - permeable test the various strength
q explain basic types of sand testingmoulding sands should be of proper quality to meet the required level of accuracy and surface finish of castings
q explain moulding sand for non-ferrous casting the melting point of non- ferrous metal is much lower than that of ferrous metals therefore the
describe mould surface coatingmould surfaces are coated after the pattern is drawn out with certain materials possessing high refractoriness
q describe dry and wet parting materialsdry parting materials these are applied by dusting these include charcoal ground bone and limestone
q explain system and parting sandsystem sand in mechanized foundries where machine moulding is employed a so called system sand is used to fill the
explain the typical wastewater characteristicstotal suspended solids 100 - 350 mgl 200 mgl is the typical value bod5 100-300 mgl 200 mgl is
q describe the type of facing and backing sandfacing sand this sand is used directly next to the surface of the pattern and comes into contact with
q explain the cushion materials which used in moulding sandthese materials when added to the moulding sand burn and from gases when the molten metal
explain the tertiary treatment for wastewatertertiary treatment in cases where secondary treatment is not adequate particularly if the discharges are
explain the secondary treatment for wastewatersecondary treatment to remove soluble bod that escapes the primary treatment and to provide added
q describe facing materialfacing materials these materials when added to the moulding sand tend to obtain smoother and cleaner surfaces of
explain the primary treatment for wastewaterprimary treatment to remove the pollutants that floats or settles typically 60 of suspended solids and 35
q can you explain about fuel oil and dextrinfuel oil it improves the mould ability of sandiron oxide it develops hot strengthdextrin it increases air
q illustrate wood and silica flourwood flour it is ground wood particles or other cellulose materials such as grain hulls they serve the same purpose