California Permit Test Coach

Alcohol and drugsQuestion 213 of 229

You are convicted of DUI. What device may you have to install on your vehicle?

A speed limiter
A second mirror
A hand control
An ignition interlock device

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Correct answer: An ignition interlock device

You may have to install an ignition interlock device (IID) after a DUI conviction.

Source: California Driver's Handbook (DL 600, California DMV, 2025), Section 9. Alcohol and Drugs: DUI Convictions, page 74

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Questions last reviewed: 18 October 2026

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