The percentage of dicalcium silicate in belit is more than ____

The power to resist an electric stress is called as _______

The specific surface of cement should not be lesser than ______

Which of the following statements about liquid lubricants is false?

Which of the following is not a solid fuel?

The colour of natural cement is ______

Which of the following is not a property of a good electrical insulator?

Total sulphur content in the cement should not be more than _____