Question

Due to ________ the external faces of wall become the sources of entry of dampness in a structure.

(a) Exposed tops of walls

(b) Miscellaneous causes

(c) Action of rain

(d) Condensation

The question was posed to me by my school teacher while I was bunking the class.

I need to ask this question from Dampness in portion Damp Proofing, Water Proofing and Termite Proofing of Construction & Building Materials

Answer 1

Right choice is (c) Action of rain

To explain I would say: If faces of wall, exposed to heavy showers of rain, not suitable protected, they become the sources of entry of the dampness in a structure. Similarly, the leaking roof also permits the rain water to enter the structure.