Question

The inner and outer skin of a cavity wall should be greater than __________ cm (half brick).

(a) 10

(b) 15

(c) 20

(d) 25

Answer 1

Right answer is (a) 10

For explanation I would say: While constructing a cavity wall, it should be kept in mind that the inner, as well as the outer skin of the cavity wall, should not be less than 10 cm (half brick). The size of the cavity may vary from 4 to 10 cm.