ASVAB · Cooling, Lubrication, and Electrical

What is the purpose of the radiator in a vehicle's cooling system?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

To dissipate heat from the engine coolant into the air

A To generate electricity
B To filter engine oil
C To store extra fuel
D To dissipate heat from the engine coolant into the air

Why this is the answer

The radiator dissipates heat from the engine coolant (antifreeze) into the surrounding air. Hot coolant from the engine flows through the radiator's thin tubes and fins, where airflow — aided by the cooling fan — removes the heat before the cooled coolant returns to circulate through the engine again. The water pump moves the coolant, and the thermostat regulates its flow to maintain proper operating temperature. A failing radiator or low coolant can cause the engine to overheat. The radiator's heat-dissipating role is a key part of the cooling system.

Source: ASVAB Auto Information — Radiator and Cooling

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About this topic: Cooling, Lubrication, and Electrical

Cooling, lubrication and electrical questions cover the radiator, thermostat and coolant; engine oil and the oil pump; and the battery, alternator and starter. Overheating and a dead battery are the two scenarios tested most. This is one of 8 Auto Information questions on cooling, lubrication, and electrical, each with a full explanation on a single study page.

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What is the purpose of the radiator in a vehicle's cooling system?

Why this is the answer

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About this topic: Cooling, Lubrication, and Electrical

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