A catalytic converter is being tested with a pyrometer. The outlet temperature is 100 degrees Fahrenheit higher than the inlet temperature. What is indicated?
A)The engine is running hot
B)The engine is running too lean
C)Nothing is happening in the converter
D)The converter is operating properly

Question

Quizplus · Accepted Answer

A properly operating catalytic converter will have a higher outlet temperature than inlet temperature, indicating that the catalyst is actively working to convert harmful emissions into less harmful gases. This temperature difference is a sign of proper operation.

A Catalytic Converter Is Being Tested with a Pyrometer