Excess of alumina in brick earth makes the brick______________?
(A) impermeable
(B) brittle and weak
(C) to lose cohesion
(D) to crack and warp on drying
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
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
The frog of the brick in a brick masonry is generally kept on______________?
(A) bottom face
(B) top face
(C) shorter side
(D) longer side