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Technician A says that diesel engines use more air than gasoline-fueled engines because 1 gallon (3.7 liters) of diesel fuel requires more air to burn than the same amount of gasoline. Technician B says that a diesel engine uses more air to prevent pistons and valves from burning. Who is correct?
National Security
A state or country's goal to maintain the survival of the state through necessary measures, including economic security, strength in defense, and diplomacy.
Cold War
Term for tensions, 1945–1989, between the Soviet Union and the United States, the two major world powers after World War II.
Immigration
The action of coming to live permanently in a foreign country.
Twenty-First Century
The current century, marked from the year 2001 to 2100, characterized by rapid technological advancements and globalization.
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