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Q: Which of the following is NOT a characteristic of poor lime?
  • A. Slaking requires more time and so it hydrates slowly.
  • B. It makes thin paste with water.
  • C. setting and hardening is fast.
  • D. The colour varies from yellow to grey.
Correct Answer: Option C - Poor lime– It is also known as lean lime or impure lime. As it contains more than 30% of clay, which makes lime to slaking slowly. • It sets and hardens very-slowly compared to the other types of limes. It has very poor binding properties and can form a thin paste with water. It is colour varies from yellow to gray. • It is used for inferior types of works because of its inferior quality.
C. Poor lime– It is also known as lean lime or impure lime. As it contains more than 30% of clay, which makes lime to slaking slowly. • It sets and hardens very-slowly compared to the other types of limes. It has very poor binding properties and can form a thin paste with water. It is colour varies from yellow to gray. • It is used for inferior types of works because of its inferior quality.

Explanations:

Poor lime– It is also known as lean lime or impure lime. As it contains more than 30% of clay, which makes lime to slaking slowly. • It sets and hardens very-slowly compared to the other types of limes. It has very poor binding properties and can form a thin paste with water. It is colour varies from yellow to gray. • It is used for inferior types of works because of its inferior quality.