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The standard penetration test is performed in clear hole of _____________ mm in diameter.

The standard penetration test is performed in clear hole of _____________ mm in diameter. Correct Answer 55 to 150

According to IS: 2131-1981, the standard penetration test is performed in clear hole of 55 to 150 mm in diameter. A casing or drilling mud is used to support the sides of the hole.

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