Which of the following oils are obtained by mixing mineral oils with animal or vegetable oils?

The percentage of dicalcium silicate in belit is more than ____

The specific surface of cement should not be lesser than ______

The final setting time of high alumina cement is about ___

The presence of cobalt in cement imparts _____ colour.

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

Which of the following should be added to the plaster of Paris in order to increase its setting time?

Tensile strength of leather belts should be about ___