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WorksheetsICE PART 2
Total questions: 62
Worksheet time: 36mins
What is the correct disposal method for biohazardous waste?
Regular trash
Biohazard containers labeled with a red bag
Recycling bins
Household waste bins
Which disinfectant is NOT recommended for use on clinical contact surfaces?
Iodophors
Quaternary ammonium compounds
Bleach
Alcohol
How should surface barriers be removed after a procedure?
Carefully, to avoid contamination
Quickly, without care
Wiped off with a cloth
Left in place for the next patient
What is the purpose of single-unit dosing?
To reduce waste
To prevent cross-contamination
To speed up procedures
To reduce costs
What type of disinfectant requires mixing immediately before use due to short shelf life?
Iodophors
Chlorine bleach
Phenolics
Alcohol
What is the recommended contact time for intermediate-level disinfectants?
30 seconds
1 minute
10 minutes
1 hour
Which of the following is true about dental unit water quality?
It should contain no microorganisms
It should meet EPA standards for safe drinking water (<500 CFU/ml)
It is not important for infection control
It should be replaced monthly
Which chemical disinfectant is corrosive to metals and should be used cautiously?
Chlorine bleach
Quaternary ammonium compounds
Iodophors
Alcohol
What type of gloves should be worn when handling disinfectants?
Latex examination gloves
Nitrile or chemical-resistant gloves
Vinyl gloves
No gloves needed
What is the most effective way to prevent cross-contamination from instrument trays?
Leaving trays open on countertops
Using covered or wrapped trays
Washing trays with water only
No special precautions needed
How should clean instruments be handled to prevent contamination?
With clean gloves or sterile hands
With bare hands
Using dirty gloves
With utility gloves
Which of the following best describes aseptic retrieval?
Removing items from packaging without touching the parts that will contact the patient
Using bare hands to open packages
Placing instruments on contaminated surfaces
Using dirty gloves to pick up sterile instruments
Which of the following is NOT a recommended method for cleaning dental impressions?
Rinsing with water
Soaking in disinfectant
Brushing with detergent
Wiping with alcohol
How should waste containing blood or bodily fluids be disposed of?
In regular trash
In labeled biohazard containers
In recycling bins
Down the drain
What is the best way to prevent biofilm formation in dental unit waterlines?
Flushing waterlines daily with antimicrobial agents
Using untreated water only
Ignoring waterline maintenance
Changing waterlines yearly
Which of the following surfaces requires disinfection after every patient?
Floors
Clinical contact surfaces
Walls
Ceiling
How should radiography equipment be disinfected?
Using intermediate-level disinfectant and barriers
With soap and water only
No cleaning required
By wiping with alcohol only
How often should waste containers be emptied?
Daily or when full
Weekly
Monthly
Annually
What is the purpose of barrier protection?
Which of the following should NOT be reused?
Handpieces
Disposable air/water syringe tips
Autoclavable instruments
Sterilized dental mirrors
How are chemical disinfectants typically prepared?
Following manufacturer’s instructions and OSHA guidelines
Mixing random concentrations
Using only water
Heating before use
How long can disinfected impressions be stored before sending to the lab?
1 day
3 days
7 days
No limit
Which of the following is a disadvantage of chemical disinfectants?
They kill all microorganisms instantly
Some can damage surfaces or instruments
They are inexpensive
They have no odor
What should be done if a disinfectant solution becomes cloudy or dirty?
Continue using it
Replace with fresh solution immediately
Dilute with water
Filter it
How should clean instruments be stored to maintain sterility?
In closed, dry, dust-free cabinets
Open on counters
In plastic bags without seals
What is the recommended action if a tray setup is accidentally contaminated?
Use as is
Replace or re-sterilize all items
Wipe with disinfectant and continue
Ignore contamination
How often should aseptic retrieval techniques be reviewed with dental staff?
Once during initial training only
Annually or when procedures change
Never
Every 5 years
What is a common cause of cross-contamination in dental offices?
Proper use of PPE
Improper handling of instruments and supplies
Regular cleaning schedules
Use of surface barriers
Which of the following is true about cleaning and disinfecting laboratories?
They do not require disinfection
Disinfection should be performed regularly, especially on frequently touched surfaces
Only floors require cleaning
Disinfection is optional
How should reusable dental handpieces be cleaned before sterilization?
Wiped with alcohol
Follow manufacturer’s instructions for cleaning and lubrication
Soaked in bleach
Washed with soap and water only
What is the most important step before disinfecting an operatory?
Remove all debris and clean surfaces
Spray disinfectant immediately
Cover surfaces with barriers
Start next patient
Which item should NOT be disinfected with chlorine bleach?
Countertops
Upholstered dental chairs
Plastic barriers
Stainless steel instruments
How should disinfectants be stored?
In original containers, labeled, away from children
In unmarked containers
Mixed with other chemicals
Near heat sources
What is the minimum effective contact time for alcohol-based disinfectants?
10 seconds
1 minute
5 minutes
10 minutes
What type of waste is generated when a needle is disposed of in a sharps container?
General waste
Hazardous waste
Regulated medical waste
Recyclable waste
How should hazardous chemical spills be cleaned?
According to OSHA Hazard Communication standards and facility protocols
With water only
Using bare hands
Ignored if small
What is the first step in preparing a disinfectant solution?
Read and follow the manufacturer’s instructions
Mix with hot water
Use any concentration
Mix with other chemicals
Which of the following can reduce the risk of cross-contamination during instrument setup?
Leaving instruments uncovered
Using clean gloves and aseptic retrieval
Using bare hands
Storing instruments in open trays
Which statement is true about single-use disposable items?
They can be reused after cleaning
They should be discarded after use
They require sterilization before reuse
They are more expensive but safer
What is the correct sequence in the workflow pattern for processing instruments?
Clean → Dirty → Sterile → Storage
Dirty → Clean → Sterile → Storage
Sterile → Dirty → Clean → Storage
Dirty → Sterile → Clean → Storage
How should contaminated instruments be transported to the sterilization area?
Open tray
Covered container labeled biohazard
Plastic bag without labeling
Hand-carried with bare hands
Which chemical agent is commonly used for cold sterilization?
Glutaraldehyde
Chlorine bleach
Alcohol
Phenolics
What is the purpose of packaging instruments before sterilization?
To keep them clean after sterilization
To allow steam penetration and maintain sterility after
To make transport easier
To keep instruments dry during sterilization
Which type of sterilizer uses high-pressure steam?
Dry heat sterilizer
Chemical vapor sterilizer
Steam autoclave
Ethylene oxide sterilizer
How often should sterilizers be biologically monitored?
Daily
Weekly
Monthly
Annually
What type of sterilization indicator provides the most reliable confirmation?
Mechanical
External chemical
Internal chemical
Biological (spore) test
What should you do if a sterilizer fails a biological test?
Continue using sterilizer
Stop using sterilizer and service immediately
Ignore the result
Only run another test
Which of the following is NOT a recommended way to store sterilized instruments?
Dry, dust-free environment
Open containers
Closed cabinets
Wrapped in sterilization pouches
What is the purpose of an ultrasonic cleaner in instrument processing?
Sterilize instruments
Remove debris using sound waves
Dry instruments
Lubricate instruments
Which of the following is true about packaging instruments for sterilization?
Packages should be sealed tightly without air pockets
Instruments should be stacked tightly
Packages should be opened before sterilization
Only paper packaging is allowed
How should instruments be loaded into the sterilizer?
Tightly packed to save space
Loosely packed to allow steam penetration
Wrapped in multiple layers of packaging
In plastic bags only
What is the minimum temperature for steam sterilization in a standard autoclave?
121°C (250°F)
132°C (270°F)
100°C (212°F)
180°C (356°F)
What is the difference between sterilization and disinfection?
Sterilization kills all microorganisms including spores; disinfection kills most but not all spores
Sterilization kills bacteria only; disinfection kills viruses
Sterilization is quicker than disinfection
Disinfection is more effective than sterilization
What should be done if instruments are not processed immediately after cleaning?
Leave them wet
Store them in a dry, clean container
Leave them on the counter
Package immediately wet
Which sterilization method uses chemicals heated under pressure without water?
Dry heat sterilization
Chemical vapor sterilization
Steam sterilization
Ethylene oxide sterilization
What is the primary role of packaging material in sterilization?
To protect instruments from damage
To maintain sterility after sterilization
To reduce processing time
To absorb moisture
How should sterilized packages be labeled?
With contents and date of sterilization
Only with sterilizer cycle number
With the sterilizer brand
No label needed
What is the purpose of a mechanical monitor on a sterilizer?
Indicate sterilization success
Monitor time, temperature, and pressure during the cycle
Kill microorganisms
Test chemical indicators
What is an internal chemical indicator used for?
To verify sterilizer is working on the outside of packages
To ensure sterilizing agent penetrates the package
To test biological activity
To replace biological indicators
What is the recommended action if instruments are dropped after sterilization?
Use immediately
Reprocess before use
Wipe with disinfectant
Rinse with water
What type of gloves should be worn during instrument processing?
Utility gloves when handling contaminated instruments
Examination gloves at all times
No gloves needed
Latex gloves only
What is the proper way to unload a sterilizer?
