Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about ________ kms?

Sauter mean diameter is the same as the ________ mean diameter?

The heat capacities for the ideal gas state depend upon the________?

Construction expenses are roughly ________ percent of the total direct cost of the plant?

Gradually varying fluid flow is an example of ________ flow?

Sulphur melting pit in the sulphuric acid plant is made of________?