According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than________________?

Related Mcqs:

1. Compared to mild steel, cast iron has (1) high compressive strength (2) high tensile strength (3) low compressive strength (4) low tensile strength The correct answer is_________________?

   A. (1) and (2) B. (2) and (3) C. (3) and (4) D. (1)and(4)...

2. The initial setting time for ordinary Portland cement as per IS specifications should not be less than_____________?

   A. 10 minutes B. 30 minutes C. 60 minutes D. 600 minutes...

3. As per IS specifications, the maximum final setting time for ordinary Portland cement should be_______________?

   A. 30 minutes B. 1 hour C. 6 hours D. 10 hours...

4. For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of___________________?

   A. 1:2 B. 1:3 C. 1:4 D. 1:6...

5. Addition of pozzolana to ordinary Portland cement increases__________________?

   A. bleeding B. shrinkage C. permeability D. heat of hydration...

6. The normal consistency of ordinary Portland cement is about________________?

   A. 10% B. 20% C. 30% D. 40%...

7. For testing compressive strength of cement, the size of cube used is_______________?

   A. 50 mm B. 70.6 mm C. 100 mm D. 150 mm...

8. The main ingredients of Portland cement are________________?

   A. lime and silica B. lime and alumina C. silica and alumina D. lime and iron...

9. The number of steps in a flight generally should not be less than________________?

   A. 2 B. 3 C. 5 D. no limit...

10. The main constituent of cement which is responsible for initial setting of cement is_________________?

    A. dicalcium silicate B. tricalcium silicate C. tricalcium aluminate D. all of the above...