Question

pebbles are separated from sand by using a large sieve at construction sites .why ?​

Answer 1

Answer:

SO THAT PEBBLES DONT CREATE A FAULT IN THE CONSTRUCTION OF BUILDING OTHERWISE IF THERE IS A CRACK THE BUILDING MIGHT COLLAPSE DURING NATURAL CALAMITIES

Answer 2

Answer:

Explanation:

• Stones and pebbles are separated from sand at a construction site by sieving. Sieving is a ‘physical method’ of separating particles.

• Sand is a “mixture of fine sand particles, stones, and pebbles”.

• In construction sites, sand is passed through sieves.

• These are either operated mechanically by hands or by passing through a conveyor constructed with differently-sized sieve plates or screens.

• The sieve plate or screen with fine holes will let through the finer sand particles and not the larger stones or pebbles.

• Thus stones or pebbles are separated from sand.