1. What is the difference between drilling and grouting? 2. What purpose fuse in electrical circuit? 3. How does petroleum produce from our earth?

1.         Grout is a construction material used to embed rebar’s in masonry walls, connect sections of pre-cast concrete, fill voids, and seal joints (like those between tiles), While, Drilling is a cutting process that uses a drill bit to cut or enlarge a hole of circular cross-section in solid materials.

2.         Fuse is a type of low resistance resistor that acts as a sacrificial device to provide over current protection, of either the load or source circuit.

3.         Petroleum is believed by most scientists to be the transformed remains of long dead organisms. The majority of petroleum is thought to come from the fossils of plants and tiny marine organisms. Larger animals might contribute to the mix as well.