Why are the EGR gases cooled before entering the engine on some ...

[Frost2351]

Why are the EGR gases cooled before entering the engine on some engines?
 
  A) Cool exhaust gas is more effective at controlling NOx emissions
  B) To prevent damage to the intake valves
  C) To prevent heating the air-fuel mixture in the cylinder
  D) To help prevent the exhaust from slowing down

Question 2

The chemical energy in fuel is converted to heat by the burning of the fuel at a controlled rate. This process is called ________.
 
  A) Power B) Torque C) Combustion D) Consumption

[pallen55]

Answer to Question 1

A

Answer to Question 2

C