Alcohol, drugs and DUI: Florida FLHSMV written test practice
5 free practice questions on alcohol, drugs and DUI for the Florida FLHSMV written knowledge test, each with the correct answer and a short explanation. Study them here, then check yourself in the interactive quiz or the exam simulator.
1. For drivers 21 years of age and older, driving with a blood alcohol concentration (BAC) is considered illegal starting at:
0.05%
✓ 0.08%
0.10%
Any detectable amount
Why: 0.08% — the legal limit for drivers aged 21 and older.
2. Under Florida's zero-tolerance law, a driver under age 21 can be cited for DUI with a blood alcohol level (BAC) of:
0.08% or higher
0.05% or higher
✓ 0.02% or higher
Any detectable amount, no minimum
Why: Florida's zero-tolerance law (Fla. Stat. §322.2616) allows license suspension for drivers under 21 who are found with a BAC of 0.02% or higher, well below the 0.08% limit for adult drivers.
3. A commercial vehicle driver is considered to be intoxicated if their BAC is:
0.08%
✓ 0.04% and higher
0.02%
0.10%
Why: For commercial drivers, a stricter limit applies—0.04%.
4. Florida's "implied consent" law means that:
You must consent verbally before being pulled over
✓ By driving on Florida roads, you have already agreed to submit to a chemical test if lawfully arrested for DUI
Only commercial drivers are subject to chemical testing
Police need a court order before requesting any test
Why: Under Florida's implied consent law, enforced by FLHSMV, simply driving on the state's roads means you've agreed to submit to a breath, blood, or urine test if lawfully arrested for DUI; refusing can lead to automatic license suspension.
5. Drivers and passengers are prohibited from having the following items inside the vehicle:
Food or drinks
✓ An open container of alcohol
Phone Holder
Sunglasses
Why: Open containers of alcohol are prohibited inside the vehicle for both the driver and passengers.