NHTSA SFST TEST PAPER 2025/2026 QUESTIONS AND
SOLUTIONS MARKED A+
✔✔Blood alcohol concentration is the number of ______ of alcohol in every 100
milliliters of blood. - ✔✔Grams
✔✔True or False. Pound for pound, the average woman contains more water than does
the average man. - ✔✔False
✔✔What do we mean by the "proof" of an alcoholic beverage? - ✔✔Double the % of
alcohol
✔✔Every chemical that is an "alcohol" contains what 3 elements? - ✔✔Hydrogen,
carbon, oxygen
✔✔True or False. Alcohol can pass directly through the stomach walls and enter the
bloodstream. - ✔✔True
✔✔What is the name of the muscle that controls the passage from the stomach to the
lower gastrointestinal tract? - ✔✔Pyloris
✔✔True or False. Most of the alcohol that a person drinks is absorbed into the blood via
the small intestine. - ✔✔True
✔✔Suppose a man and a woman who both weigh 160 pounds arrived at a party and
started to drink at the same time. And suppose that, two hours later, they both have a
BAC of 0.10. - ✔✔He had more to drink than she did
✔✔In which organ of the body does most of the metabolism of the alcohol take place? -
✔✔Liver
✔✔What is the name of the enzyme that aids the metabolism of alcohol? - ✔✔Alcohol
dehyrogenase
✔✔Once a person reaches their peek BAC, it will drop at a rate of about ____ per hour.
- ✔✔.015
✔✔True or False. It takes about thirty minutes for the average 175 pound man to "burn
off" the alcohol in one 12 ounce can of beer. - ✔✔False
✔✔The elements fo the basic DWI law are? - ✔✔1. Operation
2. Motor vehicle
3. Public place
, 4. While intoxicated
✔✔If DWI is a criminal offense, the standard of proof is? - ✔✔Probable cause
✔✔The purpose of the implied consent law is
________________________________________. - ✔✔to encourage a driver arrested
for DWI to provide a chemical test as evidence
✔✔Under the implied consent law, chemical test evidence is ___________ evidence. -
✔✔presumptive
✔✔The illegal per se law makes it unlawful to ________________________________.
- ✔✔operate a motor vehicle above legal limit
✔✔The PBT law permits a police officer to request a driver suspected of DWI to
____________ - ✔✔submit to PBT
✔✔PBT results are used to assist in determining _______________. - ✔✔help to assist
in making the arrest
✔✔The landmark Supreme Court case regarding HGN was _______. - ✔✔Blake
✔✔DWI detection is defined as ________________. - ✔✔the entire process of
identifying and gathering evidence to determine if a subject should be arrested for a
DWI violation.
✔✔The 3 phases in a typical DWI contact are? - ✔✔Phase 1 Vehicle in motion
Phase 2 Personal contact
Phase 3 Pre-arrest screening
✔✔In phase 1, the officer usually has an opportunity to _________________. -
✔✔observe the driver operating the vehicle
✔✔Phase 3 may not occur if __________________. - ✔✔there is no probable cause
✔✔Each of the major decisions can have any one of three different outcomes. They
are? - ✔✔1. Yes, do it now
2. Wait, look for additional evidence
3. No, don't do it
✔✔The 2 major evidence gathering tasks of phase 2 are ____________ and
____________. - ✔✔1. Observation
2. Interview
SOLUTIONS MARKED A+
✔✔Blood alcohol concentration is the number of ______ of alcohol in every 100
milliliters of blood. - ✔✔Grams
✔✔True or False. Pound for pound, the average woman contains more water than does
the average man. - ✔✔False
✔✔What do we mean by the "proof" of an alcoholic beverage? - ✔✔Double the % of
alcohol
✔✔Every chemical that is an "alcohol" contains what 3 elements? - ✔✔Hydrogen,
carbon, oxygen
✔✔True or False. Alcohol can pass directly through the stomach walls and enter the
bloodstream. - ✔✔True
✔✔What is the name of the muscle that controls the passage from the stomach to the
lower gastrointestinal tract? - ✔✔Pyloris
✔✔True or False. Most of the alcohol that a person drinks is absorbed into the blood via
the small intestine. - ✔✔True
✔✔Suppose a man and a woman who both weigh 160 pounds arrived at a party and
started to drink at the same time. And suppose that, two hours later, they both have a
BAC of 0.10. - ✔✔He had more to drink than she did
✔✔In which organ of the body does most of the metabolism of the alcohol take place? -
✔✔Liver
✔✔What is the name of the enzyme that aids the metabolism of alcohol? - ✔✔Alcohol
dehyrogenase
✔✔Once a person reaches their peek BAC, it will drop at a rate of about ____ per hour.
- ✔✔.015
✔✔True or False. It takes about thirty minutes for the average 175 pound man to "burn
off" the alcohol in one 12 ounce can of beer. - ✔✔False
✔✔The elements fo the basic DWI law are? - ✔✔1. Operation
2. Motor vehicle
3. Public place
, 4. While intoxicated
✔✔If DWI is a criminal offense, the standard of proof is? - ✔✔Probable cause
✔✔The purpose of the implied consent law is
________________________________________. - ✔✔to encourage a driver arrested
for DWI to provide a chemical test as evidence
✔✔Under the implied consent law, chemical test evidence is ___________ evidence. -
✔✔presumptive
✔✔The illegal per se law makes it unlawful to ________________________________.
- ✔✔operate a motor vehicle above legal limit
✔✔The PBT law permits a police officer to request a driver suspected of DWI to
____________ - ✔✔submit to PBT
✔✔PBT results are used to assist in determining _______________. - ✔✔help to assist
in making the arrest
✔✔The landmark Supreme Court case regarding HGN was _______. - ✔✔Blake
✔✔DWI detection is defined as ________________. - ✔✔the entire process of
identifying and gathering evidence to determine if a subject should be arrested for a
DWI violation.
✔✔The 3 phases in a typical DWI contact are? - ✔✔Phase 1 Vehicle in motion
Phase 2 Personal contact
Phase 3 Pre-arrest screening
✔✔In phase 1, the officer usually has an opportunity to _________________. -
✔✔observe the driver operating the vehicle
✔✔Phase 3 may not occur if __________________. - ✔✔there is no probable cause
✔✔Each of the major decisions can have any one of three different outcomes. They
are? - ✔✔1. Yes, do it now
2. Wait, look for additional evidence
3. No, don't do it
✔✔The 2 major evidence gathering tasks of phase 2 are ____________ and
____________. - ✔✔1. Observation
2. Interview
