Topic 1 · Introduction
Why should you NOT remove the radiator cap if your vehicle is overheating?
- It helps the engine cool faster
- It can cause burns or injury from steam — correct answer
- It is required by law
Why
The cooling system is pressurized when hot. Opening it releases scalding coolant and steam.
Practise this in the real format
Reading one answer is not the same as sitting the test. The simulator runs the first-time adult form: 36 questions, 6 mistakes allowed, 83% to pass.
Source: California Driver's Handbook (DL 600, rev. 6/2025), the document the DMV writes the real test from. Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
More from Introduction
- Which is the best way to handle a question you are unsure of on the DMV test?
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- A Class C license is required for:
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