It is very necessary to use high refractoriness of mould material for – McqOptions

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1.	It is very necessary to use high refractoriness of mould material for the making of insulated mould.
A.	True
B.	False
Answer» B. False

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The solidification of casting in an insulating mould produces casting of hard and brittle nature.
It is very necessary to use high refractoriness of mould material for the making of insulated mould.
Chvorinov’s rule is commonly used for prediction of surface finish of the casting made in the mould.
Which of the following formulas is given by Chvorinov’s rule for the estimation of total solidification time (ts)?a) ts = B/(V/A)nb) ts = B*(A/V)nc) ts = B*(V/
IT_IS_VERY_NECESSARY_TO_USE_HIGH_REFRACTORINESS_OF_MOULD_MATERIAL_FOR_THE_MAKING_OF_INSULATED_MOULD.?$
The_solidification_of_casting_in_an_insulating_mould_produces_casting_of_hard_and_brittle_nature.$
Chvorinov‚Äö√Ñ√∂‚àö√ë‚àö¬•s rule is commonly used for prediction of surface finish of the casting made in the mould?#
Which of the following formulas is given by Chvorinov‚Äö√Ñ√∂‚àö√ë‚àö¬•s rule for the estimation of total solidification time (ts)?$
The amount of heat removed from the castings is dependent on the amount of superheating in the casting.
More divergence of heat flow from the interface shows consequently high solidification rate of the casting.