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Questions and Answers
One of the typical objectives of materials selection is to maximise mass.
False
The Bogue composition is generally accurate to ±0.1 mass%.
False
Thermosetting plastics can be re-moulded by heating.
False
The rate of penetration of aggressive agents into concrete decreases with an increase in water/cement ratio.
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Drying shrinkage of concrete is primarily due to the cement paste.
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Screening is used to separate materials based on their chemical composition.
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Ned Is fully reversible when concrete is rewetted.
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The material that is made into sheet products by floating melted glass on a bath of molten tin is silica.
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Martensitic steel gets its high strength from the presence of calcium.
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Austenite transforms into pearlite when it is cooled from the melt.
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The material that contains much more calcium than silicon is cement.
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