Which of the following is the anti-penetration material introduced in the moulding sand?

Related MCQs

• The sand mass does not fall out of the moulding box but is held firmly in it when the moulding box is lifted. This is due to the property of
• As compared to green sand in shell moulding cooling rate of cast metal is slow. Hence as compared to green sand castings, shell moulded castings will have
• Moulding sand properties that depend upon size and shape of grains and bonding material are
• Which of the following is used as protective admixture in moulding sand for magnesium castings?
• Which statement is not true for green sand moulding?
• Silica is the second most important constituent of moulding sand which provides
• Permeability of moulding sand is increased due to/by
• Mixing coal dust with moulding sand results in
• Refractoriness in the moulding sand is due to the presence of
• The purpose of clay in a moulding sand is to