Strength Test on Cement

Q. The proper size of mould for testing compressive strength of cement is

1. 7.05 cm cube
2. 10.05 cm cube
3. 15 cm cube
4. 12.05 cm cube

Q. For testing the compressive and the tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportion of

1. 1 : 2
2. 1 : 3
3. 1 : 4
4. 1 : 6

Q. Consider the following statements regarding 'setting of cement'.
1. Low-heat cement sets faster than OPC.
2. Final setting time decides the strength of cement.
3. Initial setting time of Portland Pozzolana is 30 minutes.
4. Air-induced setting is observed when stored under damp conditions.
5. Addition of gypsum retards the setting time.
Which of the above statements are correct?

1. 1, 2 and 3
2. 2, 3 and 4
3. 3, 4 and 5
4. 2, 3 and 5

Q. The proper size of mould for testing compressive strength of cement is

1. 7.05 cm cube
2. 10.05 cm cube
3. 15 cm cube
4. 12.05 cm cube