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
A
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Briefly describe how reduced torque that results from reduced-voltage starting methods may be an advantage as well as a disadvantage.
What will be an ideal response?
Define the limited approach boundary.__________________________________________________________________________________________________________________________________________
What will be an ideal response?
Technician A says that all temperature sensors decrease in resistance as the temperature increases; this is called positive temperature coefficient (PTC). Technician B says that some vehicle manufacturers use a stepped ECT circuit inside the PCM to broaden the accuracy of the sensor. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
When the water and refrigerant in a heat exchanger flow in opposite directions, it is referred to as ____.
A. countersink B. parallel flow C. counter flow D. bias flow