Biohazardous Waste Disposal Practice Questions
20 free Biohazardous Waste Disposal practice questions for the CDA. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which type of waste must be placed in a designated biohazard container in a dental setting?
- A Used gloves without visible contamination
- B Blood-soaked gauze
- C Packaging from sterile instruments
- D Paper towels used to dry hands
Correct answer: Blood-soaked gauze
Blood-soaked materials pose a risk of pathogen transmission. They must be disposed of in regulated biohazard containers.
Sharps waste, such as needles and scalpel blades, should be disposed of:
- A In a puncture-resistant sharps container
- B In the regular office trash bin
- C In the standard recycling bin
- D Wrapped loosely in paper towels
Correct answer: In a puncture-resistant sharps container
Sharps containers prevent punctures and exposure to bloodborne pathogens. They are required by safety regulations.
Which of the following is considered regulated medical waste?
- A Uncontaminated cotton rolls
- B Extracted teeth
- C Unused sterile gauze
- D Office paper waste
Correct answer: Extracted teeth
Extracted teeth may contain blood and infectious material. They must be handled and disposed of as regulated waste.
Biohazard waste bags must be:
- A Colored bright green or blue
- B Marked with the biohazard symbol
- C Stored without any warning labels
- D Clear, plain, and unmarked
Correct answer: Marked with the biohazard symbol
Proper labeling ensures waste is handled safely. The biohazard symbol alerts personnel to potential hazards.
Which waste requires disposal by an authorized biomedical waste service?
- A Food wrappers from staff lunches
- B Sharps and blood-contaminated materials
- C Used instrument packaging
- D Clean paper towels
Correct answer: Sharps and blood-contaminated materials
Regulated waste must be transported and treated by certified services. This ensures compliance with health and safety regulations.
Before placing sharps in a sharps container, dental personnel should:
- A Recap needles using both hands
- B Recap only with the one-handed scoop technique
- C Bend or break needles before disposal
- D Chemically sterilize sharps beforehand
Correct answer: Recap only with the one-handed scoop technique
If recapping is required, the one-handed scoop method reduces injury risk. Sharps should never be broken or handled excessively.
Extracted teeth containing amalgam restorations must be:
- A Disposed of in biohazard bags
- B Disposed of as hazardous chemical waste
- C Sterilized and placed in sharps containers
- D Reused for practice procedures
Correct answer: Disposed of as hazardous chemical waste
Amalgam contains mercury, requiring special hazardous waste disposal. This prevents environmental contamination.
Which of the following should NEVER be disposed of in a sharps container?
- A Scalpel blades
- B Used needles
- C Cotton gauze pads
- D Broken anesthetic cartridges
Correct answer: Cotton gauze pads
Cotton gauze is not a sharp and should go in biohazard or regular waste depending on contamination. Sharps containers must only hold items that can puncture.
Why must biohazard waste containers remain closed when not actively in use?
- A To meet aesthetic office requirements
- B To prevent exposure and accidental spills
- C To keep odors contained only
- D To comply with recycling regulations
Correct answer: To prevent exposure and accidental spills
Closed containers prevent accidental exposure and contamination. They maintain safety and regulatory compliance.
Red biohazard bags are required for:
- A Non-contaminated office waste
- B Liquid blood and blood-soaked items
- C Paper and cardboard recycling
- D Clean PPE disposal
Correct answer: Liquid blood and blood-soaked items
Red bags identify items contaminated with blood or infectious materials. This ensures proper handling and disposal.
Which step is required before disposing of liquid biohazard waste?
- A Diluting the waste with water
- B Solidifying or absorbing the liquid before disposal
- C Pouring it directly down the drain
- D Mixing it with disinfectant and disposing in regular trash
Correct answer: Solidifying or absorbing the liquid before disposal
Liquid biohazards must be solidified to prevent spills. This reduces risk during transport and disposal.
Improper handling of biohazardous waste can result in:
- A Increased water consumption
- B Exposure to bloodborne pathogens
- C Higher supply costs only
- D Reduced appointment times
Correct answer: Exposure to bloodborne pathogens
Incorrect handling increases infection risk for staff and patients. Proper protocols protect against hepatitis, HIV, and other pathogens.
When a sharps container is three-quarters full, the correct action is to:
- A Continue using it until completely full
- B Empty it by hand into another container
- C Close and replace it immediately
- D Shake it to make more room
Correct answer: Close and replace it immediately
Overfilled sharps containers increase injury risk. Replacing them at the recommended fill line ensures safety.
Which of the following is required for storing regulated medical waste onsite?
- A A locked and clearly labeled storage area
- B Storage in open hallways
- C Refrigeration of all waste materials
- D Use of unmarked cardboard boxes
Correct answer: A locked and clearly labeled storage area
Secure, labeled storage prevents unauthorized access and contamination. It ensures compliance with regulations.
Minorly contaminated PPE such as masks and gloves should be disposed of:
- A In regular trash unless visibly soiled
- B Always in red biohazard bags
- C Inside rigid sharps containers
- D Together with chemical waste
Correct answer: In regular trash unless visibly soiled
Non-saturated PPE can be discarded as regular waste unless visibly contaminated. Fully soiled items require biohazard disposal.
Which waste can be disposed of as regular solid waste in most dental settings?
- A Blood-saturated cotton gauze
- B Uncontaminated anesthetic carpules
- C Recently extracted teeth
- D Used disposable sharps
Correct answer: Uncontaminated anesthetic carpules
Non-contaminated carpules are typically safe for regular waste. Items with blood or sharps must follow regulated protocols.
Biohazardous waste containers must be:
- A Leak-proof, tear-resistant, and labeled
- B Kept fully transparent for viewing
- C Stored outdoors at all times
- D Rinsed and flushed after each use
Correct answer: Leak-proof, tear-resistant, and labeled
Durable, leak-proof containers reduce exposure risk. Proper labeling ensures correct handling.
Which type of waste requires incineration or specialized treatment?
- A Uncontaminated plastic barriers
- B Blood-soaked regulated medical waste
- C General office paper
- D Staff cafeteria food waste
Correct answer: Blood-soaked regulated medical waste
Medical waste containing blood or pathogens must undergo special processing. This prevents environmental and biological hazards.
Extracted teeth used for dental education must be:
- A Discarded immediately after use
- B Cleaned, disinfected, and labeled
- C Given to patients' families
- D Placed in sharps containers
Correct answer: Cleaned, disinfected, and labeled
Teeth used for education must be properly disinfected and stored. This prevents contamination and ensures safe handling.
Spill kits for biohazardous waste cleanup should include:
- A Only ordinary paper towels
- B Absorbent pads, PPE, and disinfectant
- C Basic food-grade supplies
- D Printed recycling instructions
Correct answer: Absorbent pads, PPE, and disinfectant
Spill kits must contain tools to safely manage contamination. PPE and disinfectants protect personnel during cleanup.