Plywood has the advantage of_____________?
(A) greater tensile strength in longer direction
(B) greater tensile strength in shorter direction
(C) same tensile strength in all directions
(D) none of the above
Pug mill is used for_______________?
(A) preparation of clay
(B) moulding of clay
(C) drying of bricks
(D) burning of bricks
Which of the following bricks are used for lining of furnaces ?
(A) overburnt bricks
(B) underburnt bricks
(C) refractory bricks
(D) first class bricks
The internal size of mould used in brick preparation is__________________?
(A) equal to the size of a fully burnt brick
(B) smaller than the size of a fully burnt brick
(C) greater than the size of a fully burnt brick
(D) none of the above
The process of mixing clay, water and other ingredients to make brick is known as______________?
(A) kneading
(B) moulding
(C) pugging
(D) drying
Which of the following ingredients of the brick earth enables the brick to retain its shape ?
(A) alumina
(B) silica
(C) iron
(D) magnesia
Excess of silica in brick earth results in______________?
(A) cracking and warping of bricks
(B) loss of cohesion
(C) enhancing the impermeability of bricks
(D) none of the above
The nominal size of the modular brick is_______________?
(A) 190 mm x 90mmx 80 mm
(B) 190 mm x 190 mm x 90 mm
(C) 200 mm x 100 mm x 100 mm
(D) 200 mm x 200 mm x 100 mm
The percentage of alumina in a good brick earth lies between________________?
(A) 5 to 10%
(B) 20 to 30%
(C) 50 to 60%
(D) 70 to 80%
Percentage of silica in a good brick earth lies between_______________?
(A) 5 to 10%
(B) 20 to 30%
(C) 50 to 60%
(D) 70 to 80%