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WorksheetsEngine Cooling System Quiz
Total questions: 12
Worksheet time: 6mins
What percentage of engine maintenance and breakdown is related to cooling system maintenance?
30%
40%
50%
60%
What is the thermal efficiency formula used in the document?
Thermal Efficiency = Fuel Energy - Heat Loss
Thermal Efficiency = Fuel Energy / Heat Loss
Thermal Efficiency = Heat Loss / Fuel Energy
Thermal Efficiency = Fuel Energy + Heat Loss
What happens to the rejected heat in a diesel engine?
It is absorbed by the engine.
It is transferred to the cooling system.
It is released into the atmosphere.
It is stored in the fuel tank.
What does EGR stand for in the context of cooling systems?
Engine Gas Recirculation
Exhaust Gas Recirculation
Emission Gas Reduction
Energy Gas Recirculation
Why must the cooling system capacity be increased for engines with EGR?
To reduce noise.
To handle the additional heat load.
To improve fuel efficiency.
To decrease engine size.
What is the significance of cooling exhaust gas from 1200°F to 400°F in engines with EGR?
To increase fuel efficiency.
To reduce engine noise.
To prevent engine damage.
To improve exhaust emissions.
What is the temperature of the exhaust gas before it is cooled in engines with EGR?
1000°F
1100°F
1200°F
1300°F
What is the primary function of the EGR system in an engine?
To increase engine power.
To reduce nitrogen oxide emissions.
To improve fuel economy.
To decrease engine noise.
Which component is directly affected by the increased heat load due to EGR?
Fuel injectors
Turbocharger
Radiator
Air filter
How does EGR help in reducing engine emissions?
By increasing the combustion temperature.
By recirculating a portion of the exhaust gases back into the intake manifold.
By reducing the amount of fuel injected.
By increasing the air intake.
Every 1 psi increase in cooling system operating pressure will increase the cooling system’s boiling point by ____ºF.
1
2
3
4
Thermostat operational movement is controlled by a(n) __________.
Engine control module
Electrical temp sensor
Mechanical wax pellet
Dingle valve
