SFST Alcohol Influence and Physiological Effects 3

Question 1

Under federal regulations, the per se BAC limit for operators of commercial motor vehicles (CMV) is:

Accepted Answer

0.04%

Answer

0.08%

Answer

0.02%

Answer

0.06%

Question 2

Under most U.S. zero-tolerance laws, drivers under the age of 21 may be charged with DUI at a BAC of:

Accepted Answer

0.02% or higher

Answer

0.08% or higher

Answer

0.04% or higher

Answer

0.10% or higher

Question 3

The forensic technique of 'retrograde extrapolation' refers to:

Accepted Answer

Calculating what a person's BAC was at an earlier time based on a later chemical test result

Answer

Projecting a driver's future BAC based on consumption rate

Answer

Measuring BAC precisely at the moment of the traffic stop

Answer

Determining the number of drinks consumed from witness statements

Question 4

Carbonated mixers (such as tonic water or cola) typically have what effect on alcohol absorption?

Accepted Answer

They speed up alcohol absorption into the bloodstream

Answer

They significantly slow alcohol absorption

Answer

They have no measurable effect on absorption rate

Answer

They reduce the peak BAC achieved

Question 5

Alcohol is distributed throughout the body primarily via body water because:

Accepted Answer

Alcohol is water-soluble and distributes through total body water

Answer

Alcohol is stored in adipose (fat) tissue for slow release

Answer

Alcohol is too large a molecule to enter fatty tissue

Answer

Alcohol binds to hemoglobin in red blood cells

Question 6

In DUI investigations, the Widmark formula is used to:

Accepted Answer

Estimate a subject's BAC based on the amount of alcohol consumed, body weight, and elapsed time

Answer

Calculate the minimum number of drinks that impair driving ability

Answer

Determine the rate at which BAC naturally decreases per hour

Answer

Measure how food consumption reduces peak BAC

Question 7

Women typically achieve higher BAC levels than men after consuming the same amount of alcohol primarily because women:

Accepted Answer

Generally have a higher percentage of body fat and a lower percentage of total body water

Answer

Have a faster resting heart rate that circulates alcohol more rapidly

Answer

Metabolize alcohol significantly more slowly in the liver

Answer

Have blood that carries alcohol less efficiently than male blood