The slump recommended for mass concrete is about_______________?
A. 25 mm to 50 mm
B. 50 mm to 100 mm
C. 100 mm to 125 mm
D. 125 mm to 150 mm
Month: January 2019
Addition of pozzolana to ordinary Portland cement increases__________________?
Addition of pozzolana to ordinary Portland cement increases__________________?
A. bleeding
B. shrinkage
C. permeability
D. heat of hydration
With increase in moisture content, the bulking of sand_______________?
With increase in moisture content, the bulking of sand_______________?
A. increases
B. decreases
C. first increases to a certain maximum value and then decreases
D. first decreases to a certain minimum value and then increases
According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than________________?
According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than________________?
A. 7 MPa
B. 11.5 MPa
C. 16 MPa
D. 21 MPa
Early attainment of strength in rapid hardening cement is mainly due to_______________?
Early attainment of strength in rapid hardening cement is mainly due to_______________?
A. gypsum
B. finer grinding
C. tricalcium silicate
D. tricalcium aluminate
For testing compressive strength of cement, the size of cube used is_______________?
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
The main constituent of cement which is responsible for initial setting of cement is_________________?
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
The main constituent which imparts hydraulicity to hydraulic lime is______________?
The main constituent which imparts hydraulicity to hydraulic lime is______________?
A. calcium oxide
B. silica
C. clay
D. water
Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below ?
Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below ?
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
Study the following statements. (1) Hydraulic lime is suitable for white washing, (2) Fat lime is suitable for whitewashing, (3) Hydraulic lime is suitable for making mortar, (4) Fat lime is suitable for making mortar. The correct answer is______________?
Study the following statements. (1) Hydraulic lime is suitable for white washing, (2) Fat lime is suitable for whitewashing, (3) Hydraulic lime is suitable for making mortar, (4) Fat lime is suitable for making mortar. The correct answer is______________?
A. (1) and (4)
B. (2) and (3)
C. (1) and (2)
D. (3) and (4)