A tornado is a violently rotating column of air, pendant from a cumuliform cloud or underneath a cumuliform cloud, and often (but not always) visible as a funnel cloud.. Literally, in order for a vortex to be classified as a tornado, it must be in contact with the ground and the cloud base. Weather scientists haven't found it so simple in practice, however, to classify and define tornadoes.
Turbine Oil. any oil used to lubricate the bearings and auxiliary machinery in steam and hydraulic turbines, in turbopumps, and in air, gas, and refrigeration turbocompressors.Turbine oils are also used as lubricants and working fluids in various types of closed-cycle industrial machinery.ynthetic turbine oils based on trixylenyl phosphate are used in control systems of high-power steam turbines. The advantage of these oils is their high flame resistance, but they are expensive and somewhat toxic. Spravochnik po primeneniiu i normam raskhoda smazochnykh materialov, 3rd ed., books 1â2.
The uses of the fractions from fractional distillation fuel gas, LPG, refinery gas, gasoline, petrol, naphtha, paraffin, kerosene, diesel oil, gas oil, fuel oil, lubricating oils, wax and bitumen fractions are tabulated and many are nonrenewable fuels.