To avoid difficulties in making of molds, sand should be cooled below what temperature?
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What should be the accuracy of automatic moisture control for manufacturing sands?
A low speed muller is used in mechanized foundries.
How much time is taken by sand, for sand preparation in terms of muller time?
Air blasts are provided for forced cooling of sand after muller operation.
High moisture causes what in molding sands?
The pressure of which gas gives the reading of water content on the pressure gauge?
Calcium carbide reacts with moisture to give out which gas?
In a moisture content test, what amount of prepared sand is placed on the pan?
In a moisture content test, how is the prepared sand heated?
In a moisture content test, for how long should the sand in infrared heating bulb be heated?
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