Question

In pebble dash, the size of pebbles used generally varies from ___________

(a) 2-5 mm

(b) 10-20 mm

(c) 20-35 mm

(d) 30-50 mm

The question was asked by my college director while I was bunking the class.

I'd like to ask this question from Types of Plaster Finishes topic in section Pointing and Plastering of Construction & Building Materials

Answer 1

The correct choice is (b) 10-20 mm

For explanation: In pebble dash, the size of pebbles used generally varies from 10-20 mm. These pebbles are dashed against the surface in order to keep them in position. The pebbles may also be lightly pressed in the mortar by using a wooden float.