Diesel Exhaust Fluid (DEF) consumption is measured as a ratio of diesel fuel use, normally termed the dosing rate or treat rate. Medium-and heavy-duty vehicles have a dosing rate of 2-3%.EF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR) and can be found on 2010 and later model year trucks and many diesel pickups and SUVs.
The layer of the atmosphere where weather occurs is the Thermosphere (True) The Mesosphere is the layer of the atmosphere that contains ozone (False) The exosphere is the outer layer of the thermosphere (I don't know sorry :) Most meteoroids burn up in the stratosphere (True) The tropophere is divided into the inospere and the exosphere (don't know)
The thermosphere is characterized by a positive temperature gradient, which is equal to zero at the mesopause, has a maximum value between 100 and 200 km, and again becomes equal to zero near the base of the exosphere, where the atmosphere becomes practically isothermal.he layer of the upper atmosphere located between the mesopauseâthat is, the upper boundary of the mesosphereâand the base of the exosphere. On the average, the thermosphere extends from a height of about 80 km to a height of about 500 km; these limits vary by Â±10â20 percent.