Exhaust Practice Test
Exhaust Exhaust Manifolds & Headers 3
What is back pressure in an exhaust system, and how does it affect engine performance?
Select your answer
A
Pressure from the intake; it improves fuel mixing
B
Resistance to exhaust gas flow; excessive back pressure reduces engine power output
C
Pressure in the EGR system; it lowers emissions
D
Coolant pressure in the exhaust manifold water jacket; it reduces cracking
Hint
