Pit sand is extracted from the earth and can contain impurities like clay and silt. Its quality is assessed by its fineness, grain shape, and presence of impurities. The absence of stains when rubbed between fingers is an indicator of cleanliness and the absence of significant clay/silt content, which is a positive attribute for good pit sand used in construction.
Which of the following statement is incorrect regarding to pit sand?
Asked in Local Self Government Dept. Exam 2022 · Topic: Physical Properties of Materials (Hardness, Toughness, and Brittleness)
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Answer: A. When it is rub between fingers, fine pit sand should not leave any stain on the fingers.
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