In addition, the filling cap for the DEF tank is blue and will be clearly marked 'Diesel Exhaust Fluid' with the accompanying ISO standard number. However, a small number of cases have been reported where diesel has been put in the DEF tank.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.
Despite differences of opinion, many researchers agree that critical thinking is Purposeful, self-regulatory judgment which results in interpretation, analysis, evaluation, and inference, as well as explanation of the evidential, conceptual, methodological, criteriological or contextual considerations upon which judgment is based.11.
Others such as Ornstein and Hunkins suggest that critical thinking and thinking skills refer to problem-solving and other related behaviors.15 For a number of years, dental educators thought teaching problem-solving skills was akin to teaching critical thinking skills.