What does BAC (blood alcohol concentration) measure?

• A.The percentage of alcohol in a person's blood, used to measure impairment level
• B.How many drinks a person has had
• C.A person's tolerance to alcohol
• D.How quickly a person breathes

Why

BAC is the percentage of alcohol in the blood. Pennsylvania's DUI tiers and the under-21 limit are based on BAC, not on how drunk a person feels.

Manual topic: Pennsylvania Driver's Manual (PUB 95) - Chapter 5: Laws and Related Issues · From the Pennsylvania Learner's Permit (Car) practice bank (PAC-094).

Practice the full Pennsylvania Learner's Permit (Car) test

More Alcohol, Drugs & DUI Penalties questions

• In Pennsylvania, the 'general impairment' DUI tier is defined by a blood alcohol concentration (BAC) of:
• What BAC range is Pennsylvania's 'high rate' DUI tier?
• A driver with a BAC of 0.16% or higher falls into which Pennsylvania DUI tier?
• For a driver under age 21 in Pennsylvania, it is illegal to drive with a BAC of:
• How do Pennsylvania DUI penalties generally change?