Which of the following exhaust aftertreatment devices have been proven to significantly lower NOx emissions in highway diesel engines?
A. selective catalytic reduction (SCR)
B. diesel particulate filters (DPFs)
C. oxidation catalysts
D. particulate traps
Answer: A
Trades & Technology
You might also like to view...
The conventional current flow theory assumes that current flows from positive to negative.
Answer the following statement true (T) or false (F)
Trades & Technology
The type of copper tubing that has the thickest wall is Type _____.
a. 25 b. L c. Z d. K
Trades & Technology
In the viewing plane when surfaces are not parallel to the plane, the orthographic projection view shows thers surfaces smaller in
A. length or width B. width or height C. back or front
Trades & Technology
What device can best be described as an electrically operated switch?
A) A transformer B) A transducer C) A fuse D) A relay
Trades & Technology