Topic 8 · Emergencies and Unforeseen Situations
Why should you not open the radiator cap when the engine is hot?
- It can cause scalding burns — correct answer
- It makes the engine stall
- It releases coolant into the cabin
Why
The cooling system is under pressure. Opening it hot sprays scalding coolant and steam over whoever is standing there.
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.
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