What is scr and how it work

Question

Accepted Answer

SCR stands for Selective Catalytic Reduction. It is a technology used to reduce nitrogen oxide emissions from diesel engines.

SCR is a process that uses a catalyst to convert nitrogen oxides (NOx) into nitrogen (N2) and water (H2O).
It involves injecting a urea-based solution, known as diesel exhaust fluid (DEF), into the exhaust stream.
The DEF reacts with the NOx in the presence of the catalyst, breaking it down into harmless components.
SCR technology is commonly used in vehicles, power plants, and industrial applications to meet emission standards.
Example: In a diesel truck equipped with SCR, the DEF is stored in a separate tank and periodically injected into the exhaust system to reduce NOx emissions.

Accepted Answer

The SCR is a three-terminal thyristor that acts like a silicon rectifier diode whose conductor is controlled by an input current

Popular interview questions of Assistant Manager