Technician A says that gaskets are used to fill a space or gap between two objects to prevent leakage from occurring. Technician B says that there are many types of gaskets including cylinder head gaskets, valve cover gaskets, and timing cover gaskets. Which technician is correct?

Both the technicians are correct.

Explanation:

The gasket is device which is fitted between the two statically-mating surfaces to prevent any kind of leakages into or out of the parts.

It is very common between the flanges of the the pipes connecting together.

Compressive force between the two surfaces holds the gasket tightly between the surfaces and seals the joint preventing any leakage.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.