Diesel Engine EGR System Quiz

What is the purpose of cooling the gases in the EGR system of diesel engines?

• To increase the exhaust gas temperature

• To prevent the transfer of heat to the exhaust gases

• To improve thermal transfer to the engine

• To reduce the production of nitrogen oxides

Tags

NGSS.HS-PS3-4

What can happen if an EGR cooler becomes blocked with carbon and soot?

• The transfer of heat to the exhaust gases will be prevented

• The cooler will flow more efficiently

• The combustion chamber temperature will increase

• The exhaust gas temperature will decrease

How can a leak in the EGR cooler be confirmed during initial Diagnostics?

• By checking the engine coolant level

• By actuating the EGR bypass valve

• By measuring the exhaust gas temperature

• By inspecting the head gasket

What can be the result of coolant escaping into the EGR passage and entering the engine?

• White smoke and combustion gases in the coolant

• Reduced combustion chamber temperature

• Increased exhaust gas temperature

• Improved thermal transfer to the exhaust gases

What can the PCM determine by comparing the readings from the exhaust gas temperature sensors in the exhaust system?

• The presence of bubbles in the coolant

• If the EGR cooler is blocked with carbon and soot

• If the EGR cooler is doing its job

• The exhaust gas temperature of the engine coolant

Tags

NGSS.HS-PS3-4