The constituent of cement which is responsible for all the undesirable properties of cement is____________?

A. Dicalcium silicate
B. Tricalcium silicate
C. Tricalcium aluminate
D. Tetra calcium alumino ferrite

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

Le Chatelier’s device is used for determining the_______________?

A. Setting time of cement
B. Soundness of cement
C. Tensile strength of cement
D. Compressive strength of cement

The main ingredients of Portland cement are________________?

A. Lime and silica
B. Lime and alumina
C. Silica and alumina
D. Lime and iron

Hydraulic lime is obtained by_______________?

A. Burning of lime stone
B. Burning of kankar
C. Adding water to quick lime
D. Calcination of pure clay

Glazing is used to make earthenware______________?

A. Hard
B. Soft
C. Porous
D. Impervious

Quick lime is (1) slow in setting (2) rapid in slacking (3) good in strength The correct answer is____________?

A. Only (1)
B. Only (2)
C. Both (1) and (2)
D. Both (2) and (3)

Quick lime is_______________?

A. Calcium carbonate
B. Calcium oxide
C. Calcium hydroxide
D. None of the above

Number of bricks required for one cubic metre of brick masonry is____________?

A. 400
B. 450
C. 500
D. 550

Advantage of a clamp compared to a kiln for burning bricks is that_______________?

A. It takes less time for burning
B. It gives more output of first class bricks
C. It has less initial cost
D. It is suitable when bricks are required in large numbers