Question

In grooved tiles, the area covered by the grooves should not exceed _________ of the area of cored faces.

(a) 20%

(b) 30%

(c) 40%

(d) 50%

The question was asked in final exam.

My question is based upon Composite Masonry in portion Composite Masonry of Construction & Building Materials

Answer 1

The correct answer is (d) 50%

The best I can explain: Tiles used in hollow clay blocks masonry may have grooves on their faces. While manufacturing grooved tiles, it is to be kept in mind that the area covered by the grooves should not exceed 50% of the area of the cored faces.