22 Alcohol Effects & Signs of Intoxication Practice Questions & Answers
Every Alcohol Effects & Signs of Intoxication practice question from the Alcohol Server Practice Test, with the correct answer and a short explanation.
Start practice test →1. NIAAA defines a U.S. "standard drink" by the amount of pure alcohol the serving contains. How much pure alcohol is that?
- A.About 0.6 fl oz (roughly 14 grams) of pure alcohol✓ Answer
- B.Whatever amount fits in the glass the house normally uses
- C.Exactly 1.5 fl oz of pure alcohol, no matter the beverage
- D.About 1.0 fl oz (roughly 28 grams) of pure alcohol
A standard drink is defined by ethanol content, not by container size, so the count for any drink is volume multiplied by ABV. Because 0.6 fl oz of ethanol is the unit, a server must count alcohol content rather than counting glasses.
Source: NIAAA, "What Is a Standard Drink?" — 14 g (0.6 fl oz) pure ethanolReport a problem with this question
2. Which list gives three servings that each count as exactly ONE standard drink?
- A.Any 12 oz beer regardless of ABV, any glass of wine, and any cocktail regardless of recipe
- B.16 oz of regular beer (~5% ABV), 8 oz of table wine (~12% ABV), 3 oz of 80-proof spirits
- C.12 oz of regular beer (~5% ABV), 16 oz of table wine (~12% ABV), 3 oz of 80-proof spirits
- D.12 oz of regular beer (~5% ABV), 5 oz of table wine (~12% ABV), 1.5 oz of 80-proof (40% ABV) spirits✓ Answer
Each of those three servings holds about 0.6 fl oz of pure alcohol because volume times ABV works out the same: 12 × 0.05, 5 × 0.12 and 1.5 × 0.40 all equal roughly 0.6 fl oz. The other lists use oversized pours or ignore ABV entirely.
Source: NIAAA, "What Is a Standard Drink?" — beer 12 oz/5%, wine 5 oz/12%, spirits 1.5 oz/40%Report a problem with this question
3. A guest orders a 12 oz pour of a craft IPA labeled 10% ABV. For drink-counting purposes, how much should the server count?
- A.About two standard drinks✓ Answer
- B.It cannot be estimated without knowing the guest's body weight
- C.One standard drink — it is a single 12 oz beer
- D.About half a standard drink, since beer is weaker than spirits
Volume times ABV gives 12 oz × 0.10 = 1.2 fl oz of pure alcohol, which is twice the 0.6 fl oz in one standard drink. Container size is not drink count, so a high-ABV craft pour must be logged as two drinks even though it arrives in one glass.
Source: NIAAA standard-drink equivalence (0.6 fl oz ethanol); volume × ABVReport a problem with this question
4. A cocktail is built with 3 fl oz of 80-proof rum plus 0.5 fl oz of a 24% ABV liqueur, topped with cola. How should the server count it?
- A.One standard drink, because the mixer dilutes the alcohol
- B.Roughly two and a quarter standard drinks, because drinks are counted by alcohol content, not by glasses✓ Answer
- C.Two standard drinks, but only if the guest finishes it quickly
- D.One standard drink, because it is served in one glass
Add the ethanol from each ingredient: 3 × 0.40 = 1.2 fl oz plus 0.5 × 0.24 = 0.12 fl oz, about 1.32 fl oz total, which is roughly 2.2 times the 0.6 fl oz in one standard drink. Mixers, ice and glass size change the volume but remove none of the alcohol.
Source: NIAAA standard-drink equivalence (0.6 fl oz ethanol); sum of ABV × volume per ingredientReport a problem with this question
5. Alcohol enters the bloodstream differently from food. Which statement is accurate?
- A.Alcohol needs no digestion: some is absorbed through the stomach lining, but most is absorbed rapidly in the small intestine✓ Answer
- B.Alcohol must be fully digested in the stomach before any of it can enter the blood
- C.Alcohol is absorbed almost entirely through the mouth and esophagus
- D.Alcohol enters the blood only after the liver has processed it
Ethanol is a small molecule that requires no digestion, so it crosses directly into the blood — partly through the stomach lining and mostly through the much larger absorptive surface of the small intestine. That is why alcohol reaches the brain within minutes and why anything that speeds stomach emptying speeds the rise in BAC.
Source: NIAAA, Alcohol's Effects on the Body (absorption)Report a problem with this question
6. A guest eats a full meal shortly before drinking. What effect does the food have?
- A.It has no effect at all on how alcohol is absorbed
- B.It slows absorption so BAC rises more slowly, but it does not reduce the total amount of alcohol absorbed✓ Answer
- C.It speeds up the liver so the alcohol is eliminated in about half the time
- D.It soaks up the alcohol so the guest's BAC never rises
Food in the stomach delays gastric emptying, so alcohol reaches the small intestine — where most absorption occurs — more gradually and the BAC curve rises more slowly and peaks lower. The same total alcohol still ends up in the bloodstream, so a full stomach delays intoxication rather than preventing it.
Source: NIAAA, Alcohol's Effects on the Body (absorption and food)Report a problem with this question
7. Why does a carbonated drink — sparkling wine, or a spirit topped with soda — tend to raise BAC faster than the same amount of alcohol in a still drink?
- A.Bubbles make people drink less water alongside the alcohol
- B.Carbonation speeds the drink's passage out of the stomach into the small intestine, where absorption is fastest✓ Answer
- C.Carbon dioxide is metabolized by the body into additional alcohol
- D.Carbonation increases the alcohol content of the drink
Carbon dioxide promotes faster gastric emptying, delivering alcohol sooner to the small intestine's large absorptive surface. The drink contains no more alcohol than before — it simply gets into the bloodstream faster, so the BAC curve climbs more steeply.
Source: NIAAA, Alcohol's Effects on the Body (rate of absorption)Report a problem with this question
8. About how fast does a healthy adult liver process alcohol, and can that rate be increased?
- A.About one standard drink per hour, but it roughly doubles when BAC is high
- B.About one standard drink per hour, and the rate cannot be sped up✓ Answer
- C.About three standard drinks per hour, and eating speeds it up further
- D.It depends entirely on how badly the guest wants to sober up
The liver oxidizes ethanol with enzymes that work at a near-constant, saturated rate of roughly one standard drink per hour (about 0.015 BAC per hour), and it does not work faster just because more alcohol is present. Any alcohol consumed beyond that rate simply accumulates in the bloodstream and raises BAC.
Source: NIAAA, Alcohol Metabolism; state responsible-beverage-service regulations (liver processes ~1 drink/hour and does not speed up)Report a problem with this question
9. An impaired guest asks for black coffee "to sober up" before driving home. What actually lowers a person's BAC?
- A.A cold shower and some fresh air outside
- B.Only the passage of time, while the liver metabolizes the alcohol already absorbed✓ Answer
- C.Caffeine, which speeds up liver metabolism
- D.Vigorous exercise, which burns the alcohol off
BAC falls only as the liver oxidizes alcohol at its fixed rate, and nothing a guest ingests or does changes that rate. Coffee, cold air, showers and exercise can make someone feel more awake, which is more dangerous — a wide-awake guest is just as impaired and may be more willing to drive.
Source: NIAAA, Alcohol Metabolism (only time reduces BAC)Report a problem with this question
10. A new server asks what blood alcohol number they should use to decide whether to keep serving a guest. What is the best answer?
- A.Keep serving until the guest admits being over the legal driving limit
- B.Servers should test the guest's BAC with a breath device before every third drink
- C.One single nationwide BAC number applies to every guest in every state
- D.Servers do not measure BAC — service decisions rest on observable signs of impairment, and the specific legal rules vary by state, so follow your state's alcohol beverage control agency and your house policy✓ Answer
Responsible service law turns on obvious, observable intoxication, not on a measured number, and servers are neither trained nor equipped to test BAC. Because thresholds, driver categories and service rules differ from state to state, the reliable standard is what you can see plus your state agency's rules and your establishment's policy.
Source: Responsible-service standard: refusal based on obvious intoxication observed by the server; state ABC rules vary by jurisdictionReport a problem with this question
11. At last call a guest who drank several drinks in the previous 30 minutes seems only mildly affected. Twenty minutes later they are visibly much worse. What best explains this?
- A.Alcohol already swallowed is still being absorbed, so BAC keeps rising after the last drink✓ Answer
- B.Another bartender must have served the guest without telling anyone
- C.Alcohol effects always peak instantly, so this is by definition a medical emergency
- D.The bar's pours were unusually weak, which delayed the effects
Alcohol sitting in the stomach and small intestine continues moving into the bloodstream for a considerable time after swallowing, so BAC and impairment can peak well after service ends. This delayed-effect problem is why a guest who looks acceptable at last call may be badly impaired in the parking lot, and why transportation should be arranged before they leave.
Source: NIAAA, Alcohol's Effects on the Body (absorption continues; BAC rises after last drink)Report a problem with this question
12. Two guests of the same sex drink the same three standard drinks over the same hour. Why is the smaller, lighter guest likely to reach a higher BAC?
- A.Smaller people have proportionally larger livers, which raises BAC
- B.Smaller people absorb extra alcohol through the skin
- C.Body size makes no difference to BAC; only the number of drinks matters
- D.Alcohol distributes through body water, and a smaller body holds less water to dilute the same amount of alcohol✓ Answer
BAC is a concentration, so the same grams of alcohol spread through a smaller volume of body water produce a higher number. Body composition matters for the same reason: fat tissue holds little water, so two people of equal weight but different muscle-to-fat ratios can end up at different BACs from identical drinks.
Source: NIAAA, Alcohol's Effects on the Body (body weight and body water)Report a problem with this question
13. On average, why does a woman reach a higher BAC than a man of the same body weight after the same number of drinks?
- A.Women typically have a lower proportion of body water and, on average, less gastric alcohol-metabolizing enzyme activity, so the same alcohol is less diluted and less broken down before absorption✓ Answer
- B.Women simply drink faster than men
- C.Women's livers cannot metabolize alcohol at all
- D.Alcohol is stronger when it is served in a smaller glass
Because BAC is alcohol per unit of body water, a lower body-water proportion concentrates the same dose more. Lower average activity of the stomach enzyme that begins breaking down ethanol also means a larger share reaches the bloodstream intact, so identical drinks produce a higher BAC.
Source: NIAAA, Alcohol's Effects on the Body (sex differences in body water and gastric ADH)Report a problem with this question
14. Why do shots, chugging, "stacking" a fresh drink before the last one is finished, and drinking games create the greatest risk for a guest?
- A.They contain more alcohol per ounce than any other form of service
- B.They stop alcohol from ever reaching the small intestine
- C.They deliver alcohol far faster than the liver's fixed rate of about one drink per hour, so BAC climbs steeply before behavioral cues appear✓ Answer
- D.They cause the liver to shut down permanently after the first hour
Elimination is capped at roughly one standard drink per hour, so consumption faster than that accumulates directly in the bloodstream. Rapid intake also means much of the alcohol is still being absorbed when the guest still looks fine, so the visible cues lag well behind the actual BAC.
Source: NIAAA, Alcohol Metabolism (fixed elimination rate); state responsible-beverage-service regulations (amount and speed of consumption)Report a problem with this question
15. What does "blood alcohol concentration" (BAC) actually measure?
- A.The concentration of alcohol in the blood, expressed as a percentage — grams of alcohol per 100 mL of blood✓ Answer
- B.How intoxicated the person reports feeling
- C.The total number of drinks the person has consumed that day
- D.The volume of alcohol still sitting in the stomach
BAC is a ratio of alcohol to blood volume, not a count of drinks, which is why identical drinking produces different BACs in different bodies. It is also why how a guest says they feel is unreliable: tolerance changes the feeling and the visible signs but not the concentration in the blood.
Source: NIAAA, Understanding Blood Alcohol Concentration (grams of alcohol per 100 mL of blood)Report a problem with this question
16. A normally quiet guest becomes loud, gets overly friendly with strangers, starts using foul language, and begins buying rounds for the next table. Which category of intoxication cue is this?
- A.Slowed reaction time
- B.Lowered inhibitions✓ Answer
- C.Impaired judgment
- D.Loss of coordination
Alcohol depresses the central nervous system starting with the areas that govern restraint and social self-control, so louder speech, over-familiarity, foul language and a faster rate of consumption are classic lowered-inhibition cues. This category typically appears first, which is why it is judged as a change from that guest's own baseline rather than against other guests.
Source: Four cue categories of responsible service; state responsible-beverage-service regulations (lowering of inhibitions)Report a problem with this question
17. A guest starts complaining that the drinks are "too weak" and overpriced, argues with a neighbor over nothing, and drops a handful of cash on the bar without counting it. Which category of cue is this?
- A.Loss of coordination
- B.Impaired judgment✓ Answer
- C.Lowered inhibitions
- D.Nothing to note — these are just personality traits
Complaining about drink strength, carelessness with money, growing argumentativeness and irrational statements are the standard impaired-judgment cues, reflecting depression of the brain's reasoning and risk-assessment functions. This category usually follows lowered inhibitions in the progression, so its appearance means the server should already be slowing service.
Source: Four cue categories of responsible service; state responsible-beverage-service regulations (loss of judgment)Report a problem with this question
18. A guest stares blankly for several seconds before answering a simple question, repeats the same story twice, speaks slowly with slurred words, and has glassy, unfocused eyes. Which category of cue is this?
- A.Nothing more than ordinary tiredness; keep serving normally
- B.Impaired judgment
- C.Lowered inhibitions
- D.Slowed reaction time✓ Answer
Delayed responses, repetitive or slurred speech and an unfocused gaze show that alcohol is slowing central nervous system processing, which is the slowed-reaction-time category. It appears later in the progression than inhibitions and judgment, so a guest showing it is already substantially impaired and alcohol service should stop.
Source: Four cue categories of responsible service; state responsible-beverage-service regulations (physical reactions: slurred speech, decreased alertness)Report a problem with this question
19. A guest sways while standing, knocks over a glass while reaching for it, and fumbles repeatedly trying to pull bills from a wallet. Which category is this, and what should the server do?
- A.Lowered inhibitions; slow the guest down by switching them to a light beer
- B.Impaired judgment; ask how many drinks they have had and serve one more if the answer is under four
- C.Loss of coordination; stop alcohol service, offer water or food, and arrange safe transportation✓ Answer
- D.Slowed reaction time; wait until you hear a clear slur before doing anything
Swaying, spilling and fumbling are motor-control failures, the loss-of-coordination category, and they appear only after inhibitions, judgment and reaction time are already affected. Because that indicates obvious intoxication and BAC may still be rising, the correct response is to stop alcohol service, offer water or food, and arrange a safe ride — a lighter beer is still alcohol and self-reported drink counts are unreliable.
Source: Four cue categories of responsible service; state responsible-beverage-service regulations (refusal/intervention on obvious intoxication)Report a problem with this question
20. A regular with high tolerance has had six standard drinks in two hours but shows almost no behavioral cues. What is true?
- A.Tolerance masks the outward signs while BAC and impairment are unchanged, which is why servers must count drinks AND observe behavior✓ Answer
- B.The guest's liver is metabolizing faster than one drink per hour to keep up
- C.Since there are no visible cues, service may safely continue
- D.Tolerance lowers the guest's BAC, so fewer cues really does mean less alcohol in the blood
Tolerance is an adaptation of the nervous system to the felt effects of alcohol; it does not change how much alcohol is in the blood or how much reaction time, judgment and coordination are actually degraded. Six drinks in two hours far exceeds the liver's fixed rate, so this guest's BAC is high and still rising even though he looks fine — behavior alone would miss it, and a drink count alone would miss a low-tolerance guest.
Source: State responsible-beverage-service regulations: tolerance lessens felt effects and hides signs; impairment unchanged; NIAAA Alcohol MetabolismReport a problem with this question
21. A guest is slumped in a booth and cannot be roused, breathing slowly and irregularly, with cold, clammy, bluish-tinged skin. What should staff do?
- A.Let them sleep it off in the booth and check on them at closing
- B.Give them coffee and walk them around until they wake up
- C.Put them alone into a rideshare so they can get home and rest
- D.Treat it as a medical emergency: call emergency medical services immediately, stay with them, and if they are lying down turn them on their side to protect the airway from vomit✓ Answer
Inability to be roused, slow or irregular breathing, and cold, clammy, pale or bluish skin are alcohol-overdose signs: the brain areas controlling breathing, heart rate and body temperature are shutting down, and the gag reflex may be lost. BAC can keep rising after the last drink, so "sleeping it off" lets the person get worse and risks choking on vomit — the airway-protecting side position plus immediate EMS is the only safe response, and the incident should be logged.
Source: NIAAA, Understanding the Dangers of Alcohol Overdose (signs and emergency response)Report a problem with this question
22. Midway through service a guest mentions they took a prescription sedative a couple of hours earlier. How should that change the server's approach?
- A.No change — only alcohol counts toward impairment
- B.Simply ask the guest to double the time between drinks and otherwise serve normally
- C.Many medications and other drugs amplify alcohol's depressant effects, so the guest may be dangerously impaired at a much lower drink count; watch closely and be prepared to stop service✓ Answer
- D.Switch the guest to beer, since beer cannot interact with medication
Alcohol is a central nervous system depressant, and sedatives and many other medications depress the same systems, so their effects combine and can range from marked impairment to respiratory failure and death. The drink count is therefore no longer a safe guide: the standard for refusing service is obvious impairment from any cause — alcohol, medication or other drugs — and beer offers no protection because it contains the same ethanol.
Source: NIAAA, Harmful Interactions: Mixing Alcohol with MedicinesReport a problem with this question
Practice questions based on federal law (the national 21 minimum purchase age), NIAAA and NHTSA responsible-beverage-service guidance, and the principles common to state seller/server training programs. Alcohol law is set by each state: legal hours of sale, the minimum age to serve, which IDs are acceptable, whether dram shop liability exists, and all penalties differ — and many states require one specific approved course. Not affiliated with ServSafe®, TIPS®, or any training provider. Always check your state's alcohol beverage control agency and your employer's house policy. NIAAA Alcohol Policy Information System →