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Q: Pick up the incorrect statement from the following.
  • A. The degree of grinding of cement, is called fineness
  • B. The process of changing cement paste into hard mass, is known as setting of cement
  • C. The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement
  • D. The heat generated during chemical reaction of cement with water is known as heat of hydration.
Correct Answer: Option C - Fineness : Degree of grinding of cement is called fineness. Setting of cement : Process of changing cement paste into hard mass is know as setting of cement. Soundness of cement : Certain cement undergo large expansion after setting causing disruption of the set and hardend mass. • Unsoundness in cement is due to excess lime is detected by Le-Chatelier test and excess Mg and lime is defected by the autoclave test or excess magnesia in cement.
C. Fineness : Degree of grinding of cement is called fineness. Setting of cement : Process of changing cement paste into hard mass is know as setting of cement. Soundness of cement : Certain cement undergo large expansion after setting causing disruption of the set and hardend mass. • Unsoundness in cement is due to excess lime is detected by Le-Chatelier test and excess Mg and lime is defected by the autoclave test or excess magnesia in cement.

Explanations:

Fineness : Degree of grinding of cement is called fineness. Setting of cement : Process of changing cement paste into hard mass is know as setting of cement. Soundness of cement : Certain cement undergo large expansion after setting causing disruption of the set and hardend mass. • Unsoundness in cement is due to excess lime is detected by Le-Chatelier test and excess Mg and lime is defected by the autoclave test or excess magnesia in cement.