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ASVAB · Engine Basics and the Four-Stroke Cycle

What is the recommended action if the engine temperature gauge reads in the red (overheating) zone?

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

Safely pull over, turn off the engine, and let it cool to prevent serious engine damage

  1. A Add more fuel
  2. B Ignore it and keep driving
  3. C Speed up to cool it faster
  4. D Safely pull over, turn off the engine, and let it cool to prevent serious engine damage

Why this is the answer

If the temperature gauge reads in the RED/overheating zone, the recommended action is to SAFELY PULL OVER, turn off the engine, and let it COOL — continuing to drive an overheating engine can cause severe damage (warped cylinder head, blown head gasket, seized engine). ASVAB Auto Information tests basic maintenance/troubleshooting. Causes of overheating include low coolant, a failed water pump, a stuck thermostat, or a leak. Never remove the radiator cap while hot (pressurized hot coolant can cause burns). Knowing the proper response to overheating is commonly tested.
Source: ASVAB Auto Information — Overheating

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This question is from our ASVAB Practice Tests practice test. Take the full practice test to test your knowledge across all Engine Basics and the Four-Stroke Cycle and other topics.

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About this topic: Engine Basics and the Four-Stroke Cycle

Engine basics cover the four-stroke cycle (intake, compression, power, exhaust), the parts that make it happen — pistons, valves, crankshaft, camshaft — and the terms used to describe engines, such as displacement and compression ratio. This is one of 21 Auto Information questions on engine basics and the four-stroke cycle, each with a full explanation on a single study page.

New to this exam? Our ASVAB exam guide explains the format, scoring, and how to prepare.

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