1. How many components are mainly used to prepare concrete?
2. Which of the below is the most common alternative to cement in concrete?
Correct Answer is : Asphalt
3. What is the ideal water-cement ratio to be used while hand mixing?
Correct Answer is : 0.5-0.6
4. Which IS code gives details regarding water to be used in concrete?
Correct Answer is : IS 456
5. How many types of chemical admixture are there?