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.
PENNSYLVANIA PennDOT · WRITTEN TEST (CLASS C)
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Alcohol, drugs and DUI: Pennsylvania PennDOT written test practice
5 free practice questions on alcohol, drugs and DUI for the Pennsylvania PennDOT 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.
2. In Pennsylvania, what blood alcohol concentration (BAC) triggers a violation for a driver under 21?
- 0.08% or higher, the same as for adult drivers
- ✓ 0.02% or higher
- 0.10% or higher
- Any amount detected, with no numeric threshold
Why: Pennsylvania's zero-tolerance law sets the BAC limit at just 0.02% for drivers under 21, far below the 0.08% limit that applies to drivers 21 and older.
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. What does Pennsylvania's implied consent law mean for licensed drivers?
- Drivers may refuse any chemical test with no consequences
- ✓ By driving on Pennsylvania roads, drivers have already agreed to submit to chemical testing if lawfully arrested for DUI
- Only drivers with a commercial license are subject to chemical testing
- Implied consent only applies to drivers involved in a crash
Why: Under implied consent, simply driving on Pennsylvania roads means you've agreed to chemical testing (breath, blood, or urine) if a police officer lawfully arrests you on suspicion of DUI; refusing triggers 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.
About the Pennsylvania written test
18questions on the real test
15/18correct answers to pass (83%)
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