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