Practice status

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Build a practice round

Decide whether each statement is true or false for everyday settings. Choose a topic or practise across all 24 statements.

Optional. Leave blank to use handwashing-1; reuse a seed for the same question and answer order.

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Original questions based on CDC community guidance, checked 10 September 2026. Curated practice, not CDC endorsement. Healthcare workers should follow clinical guidance.

CDC community guidanceClinical guidance
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Review what to practice next

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A practice score is not a clinical qualification, health assessment or proof of mastery.

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Missed answer review

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Topic performance

Which topics need another look? Bars count correct and missed answers in this round, not long-term skill.

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Answer ledger

Question ID Prompt Topic Your answer Correct answer Outcome Explanation Source Copy
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Food Safety Basics Quiz Practice U.S. home food safety with 24 original scenarios, clear answer explanations and focused retries of the questions you missed.
Food Allergen Safety Quiz Practice U.S. food allergen safety with 24 original true-or-false questions, answer explanations and focused retries of missed questions.
Child Poison Prevention Quiz Practice U.S. child poison prevention with 30 household questions, source-linked explanations and focused retries for the answers you miss.
Home Electrical Safety Quiz Practice recognizing U.S. home electrical hazards with 24 scenarios and explanations of safer choices and when to seek qualified help.

Hands can look clean after a toilet visit or a diaper change and still carry germs. Touching food, another person or a shared object can then pass those germs on. Handwashing interrupts that transfer by removing contamination from the skin, which makes both the timing of a wash and the washing technique important.

For everyday use at home, school and ordinary workplaces, soap and clean, running water are the usual first choice. Plain bar soap and plain liquid soap are both suitable. An antibacterial label is not needed for routine handwashing benefits, and the water does not need to be hot enough to kill germs. Comfortable warm or cold water works.

The need to wash follows what the hands have touched, not just whether dirt is visible. Important washing times include the following.

  • Wash before, during and after preparing food, and before and after eating.
  • Wash before and after treating a cut or wound, or caring at home for someone with vomiting or diarrhea.
  • Wash after toilet use, diaper changes, blowing the nose, coughing or sneezing, handling garbage, and contact with animals, pet food or treats.

A complete wash includes wetting, lathering, scrubbing, rinsing and drying. Scrubbing with soap should last at least 20 seconds and cover the palms, backs of the hands, between the fingers and under the nails. Wetting and rinsing time do not replace that scrubbing time. A clean towel or an air dryer can finish the wash; thorough drying matters because germs transfer more readily from wet hands.

When soap and water are unavailable, hand sanitizer containing at least 60% alcohol is a useful fallback for hands that are not visibly dirty or greasy. Use the amount on the label, cover all hand surfaces and rub until dry rather than wiping it off. Sanitizer does not eliminate every type of germ or reliably remove harmful chemicals. Baby wipes are not reliable germ-removal substitutes, and surface-disinfecting wipes should not be used on skin.

Young children need adult supervision with sanitizer, and the container should be stored out of reach because swallowing it can cause poisoning.

These are community handwashing principles, not a clinical protocol. General hygiene education is informational rather than individual medical advice, and healthcare work requires setting-specific hand-hygiene guidance and training.

How to Use This Tool:

Practice uses 24 original true-or-false statements based on U.S. Centers for Disease Control and Prevention (CDC) community guidance. The question bank records a source check dated 10 September 2026. It is curated practice, not an official CDC assessment, endorsement or complete hand-hygiene syllabus.

  1. Choose a Practice pool and Question count. All topics offers 3, 6, 12 or 24 questions. Fundamentals and Everyday scenarios each offer 3, 6 or 12. The six-statement pools Key times, Technique, Sanitizer and Common myths offer 3 or 6. The starting setup is six questions from All topics. Switching pools resets an unsupported count to six.
  2. Select Feedback. The default, After each answer, reveals the judgment, explanation and source before you continue. End of the round records each selection but withholds correctness and explanations until the completed review.
  3. Enter an optional Replay seed under Advanced. Leaving it blank uses the fixed seed handwashing-1, not a fresh random seed. A custom seed may contain up to 128 characters. Shorten it if a seed-length warning appears.
  4. Select Start practice, then choose True or False for each statement. Your choice locks immediately in either feedback mode. Use Next question to continue and View results after the last answer. There is no skipped-question or early-finish result.
  5. Review the explanations, then choose the next round. Retry missed starts an unanswered round containing only your wrong answers. Replay same seed repeats the current round, while Try a new seed starts another round with a different seed. Change setup clears the attempt so you can choose a different pool or count.

Interpreting Results:

During a round, Practice status shows how many statements you have answered. After completion, it shows how many were correct out of the selected total. A progress bar at 100% means every statement has an answer, not that every answer is correct. There is no pass mark or proficiency band.

Missed answer review compares your choice with the correct judgment and explains the correction. The Answer ledger also includes the questions you answered correctly. Reading those explanations helps distinguish an understood rule from a correct guess.

Topic performance shows counts of Correct and Missed answers for the topics sampled in that round. Short rounds need not include every topic or equal numbers from each topic. Untested topics are not rated, and any suggested review topic comes from the category with the most misses rather than a long-term skill measurement. The answer ledger remains available if the chart cannot load.

Perfect round means there were no misses in that attempt, so there is no Retry missed option. A high score does not verify actual washing technique, assess infection risk or establish clinical or workplace competence. Use missed explanations to identify the washing habit or product choice that needs attention.

Technical Details:

Washing and sanitizing act differently. Soap and rubbing help loosen and trap material so that rinsing can carry it away. Alcohol-based sanitizer inactivates susceptible germs on the hands but does not provide the same removal of dirt and chemicals. This explains why the presence of a sink, visible soil and the type of contamination change the appropriate choice.

Hand-cleaning rules

The numeric minimums apply to a particular step or product property. Neither is a measurement of how clean the hands have become.

Situation Rule Important limit
Scrubbing with soap At least 20 seconds The minimum includes exactly 20 seconds of scrubbing. Wetting, rinsing and drying are separate steps.
Choosing an alcohol-based hand sanitizer At least 60% alcohol on the label 60% meets this concentration minimum. It does not make sanitizer suitable for every germ, dirty hands or chemical exposure.
Visible dirt or grease Wash with soap and clean, running water Sanitizer may work less effectively on soiled or greasy hands.
Pesticide or other harmful chemical contact Wash carefully with soap and water, or as directed by a poison control service Sanitizer alone is not reliable chemical removal. Exposure-specific instructions take priority over a general hygiene routine.
Drying washed hands Use a clean towel or an air dryer Both are acceptable. Evidence does not establish one as universally better at reducing germs.

Correct sanitizer use also requires the label's amount and contact with all hand surfaces until dry. Wiping it off early can reduce effectiveness. Soap and water remove some germs more effectively than sanitizer, including norovirus.

Healthcare guidance has a different scope. Alcohol-based hand sanitizer is preferred in most clinical situations when hands are not visibly soiled, with specific exceptions requiring soap and water. Household guidance therefore cannot stand in for patient-care protocols, surgical hand preparation or professional training.

Practice score and progress

Every statement carries the same weight. A correct judgment earns one point and an incorrect judgment earns zero, with no partial credit or deductions. The score ranges from zero to the number of selected statements. Accuracy and progress use that same selected total as their denominator.

Points=C Accuracy (%)=100×CN Progress (%)=100×AN

Here, C is the number of correct answers, A is the number answered and N is the number selected for the round. They are whole-question counts, with N > 0 and 0 ≤ C ≤ A ≤ N. While a round is unfinished, unanswered statements remain part of N but do not count as incorrect or enter the missed-answer retry. Final review requires an answer to every selected statement.

Accuracy retains its unrounded value for calculation. Only the visible progress label rounds to the nearest whole percent, with half-percent ties rounded upward. The final correct-out-of-total fraction remains exact. Feedback timing does not change the answer key or point values.

Selection and comparable attempts

Selection is seeded and without replacement, so a statement does not repeat within one round. Keep the pool, count, feedback mode, seed and question-bank version unchanged for an exact replay of questions and option order. A new seed can reuse statements from the same finite pool; a 24-question round necessarily includes all 24 statements. Scores from different pools, shorter rounds or missed-only retries are not interchangeable, and remembering a repeated answer is not the same as applying the rule in daily life.

Privacy Notes:

Answers are scored in your browser, but the page address can retain the practice setup, seed, selected answers and current position, including an unfinished attempt. Someone who receives that address may be able to restore those choices. Do not put names or other sensitive information in a replay seed.

Change setup removes the current attempt from the page address, not copies already shared or recorded in browser history. Opening or sharing an address can transmit it, and loading the chart can require an external software request. Browser scoring is not a guarantee of offline operation or zero transmission. The quiz does not provide an account-based progress history.

An incompatible or invalid saved attempt is rejected rather than silently treated as a valid score. If Saved attempt unavailable appears, the quiz returns to setup; choose an available pool and count, then start a new round.

Worked Examples:

A short mixed round with only one topic

For the current question bank, choose All topics, three questions, After each answer and the seed handwashing-1. The statements concern surface-disinfecting wipes, baby wipes and care during vomiting or diarrhea. Answering False, True and True, respectively, produces a score of 2/3. The baby-wipe answer is the miss because those wipes are not a dependable replacement for soap and water. All three statements belong to Common myths, so this round shows two correct and one missed in that topic without rating the other three topics.

Correcting one water-temperature misconception

Choose all six Technique questions and answer every statement correctly except the claim that water must be hot enough to kill germs. Choosing True for that claim gives 5/6. The explanation identifies False as the correct judgment because comfortable warm or cold running water works. Retry missed then creates a one-question round. Answering False produces 1/1 for that new attempt, not a revised six-question score or evidence of broader mastery.

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