Which of the following pairs is not matched correctly ?

Fineness - Nurse and Blains

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Consistency - Vicat

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Soundness - Le-Chatelier

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Sp. Gravity - Lea and Nurse

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Solution

The correct option is D Sp. Gravity - Lea and Nurse
The specific gravity of hydraulic cement obtained using. Le-Chatelier flask.
The fineness of cement is represented by a specific surface i.e. total surface area in cm $^{2}$ per gram of cement and is measured by The Lea and Nurse apparatus.

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