Nitrocellulose glues are prepared from _____

Clay predominates in calcareous materials while calcium carbonate predominates in argillaceous materials.

The colour of natural cement is ______

During the setting action of the cement, tricalcium aluminate is formed within ____ after adding water to the cement.

The resistance to water of acid-resistant cement is increased by adding ______ of linseed oil.

Which of the following compounds is not formed during the setting action of the cement?

The specific surface of cement should not be lesser than ______

Which of the following is not true about pozzuolana cement?