Free MLPAO Standards of Practice Questions and Answers — Questions and Answers
Question 1: Laboratory specimens are labeled with all of the following EXCEPT:
- patient's name.
- date and time of collection.
- time received in the laboratory. (Correct answer)
- source of specimen.
- patient's identification
Correct answer: time received in the laboratory.
The Transportation of Dangerous Goods Act requires packages containing dry ice to be shipped in an unsealed container with a Miscellaneous Dangerous Goods label. Dry ice sublimes into carbon dioxide gas, and a sealed container could build up pressure and explode. The unsealed container allows the gas to escape safely, while the label identifies it as a Class 9 dangerous good.
Question 2: The Transportation of Dangerous Goods Act requires packages that contain dry ice be shipped in:
- a sealed container with a Dangerous Goods label only.
- a sealed container with a Miscellaneous Dangerous Goods label.
- a sealed container with absorbent material and a Dangerous Goods label.
- an unsealed container with absorbent material and a Dangerous Goods label.
- an unsealed container with a Miscellaneous Dangerous Goods label. (Correct answer)
Correct answer: an unsealed container with a Miscellaneous Dangerous Goods label.
For a minor spill of radioactive material, the primary procedures involve containing the package, following standard decontamination, and placing it in a shielded area. Notifying local authorities (like police or fire departments) is typically reserved for major spills that pose a significant public health risk, not for minor, contained leaks that can be managed internally with established protocols.
Question 3: When a damaged package of radioactive material (classified as a minor spill) is handled, all of the following procedures should be followed EXCEPT:
- place the package in a plastic bag.
- notify local authorities of the leak and its extent. (Correct answer)
- follow standard decontamination procedures for spills
- place the contained package in a shielded storage area.
- survey the area where the package has been and clearly mark all contaminated spots
Correct answer: notify local authorities of the leak and its extent.
The WHMIS symbol depicting a flaming circle represents 'Oxidizing Material.' This symbol indicates that the substance can cause or contribute to the combustion of other materials, meaning it 'may burn unexpectedly,' 'may react with water' (if it's a strong oxidizer), or 'may explode if exposed to shock or heat.' Environmental damage from fumes is typically associated with the 'Environment' symbol, not the oxidizing material symbol.
Question 4: Which risk is NOT associated with the following WHMIS symbol?
- May cause environmental damage from fumes (Correct answer)
- May react with water
- May be chemically unstable
- May burn unexpectedly
- May explode if exposed to shock or heat
Correct answer: May cause environmental damage from fumes
This risk is not typically associated with the WHMIS symbol for explosive materials. Explosive hazards are more about the potential for sudden reactions, instability, burning, or explosions due to shock, heat, or contact with water. Environmental damage from fumes would be associated with a different hazard symbol, such as one for environmental hazards or toxic substances.
Question 5: Which hazard is matched to the hazard symbol below?
- May cause permanent injury or death (Correct answer)
- May release toxic vapors
- May react with water
- May ignite spontaneously
- Includes fluids containing toxic products
Correct answer: May cause permanent injury or death
The hazard symbol typically depicting a skull and crossbones, or a similar acute toxicity symbol, is universally recognized to indicate substances that can cause severe harm. This includes permanent injury or death, even from a single exposure or in small quantities. It alerts individuals to the immediate and serious health risks posed by highly poisonous materials.
Question 6: Where there is a risk of aerosol production, Level 2 containment requires a minimum of:
- Level 1 biosafety cabinet (Correct answer)
- Level 2 biosafety cabinet
- Level 3 biosafety cabinet
- Laminar flow hood
- No special hood required
Correct answer: Level 1 biosafety cabinet
For Level 2 containment, when there is a risk of aerosol production, a Class I or Class II biosafety cabinet (BSC) is required. These cabinets, often referred to as Level 1 biosafety cabinets in some contexts, provide essential personnel and environmental protection. They achieve this by filtering exhaust air and maintaining an inward airflow, effectively containing aerosols and preventing their release into the laboratory environment.
Question 7: According to the Clinical and Laboratory Standards Institute (CLSI) which type of water should be used for routine laboratory assays?
- Filtered water
- Distilled water
- De-ionized water
- Double distilled water (DDH,O)
- Clinical Laboratory Reagent Water (CLRW) (Correct answer)
Correct answer: Clinical Laboratory Reagent Water (CLRW)
According to the Clinical and Laboratory Standards Institute (CLSI), Clinical Laboratory Reagent Water (CLRW) is the standard for routine laboratory assays. CLRW, formerly known as Type I water, has stringent specifications for microbial count, resistivity, and organic contaminants. This ensures it is free from impurities that could interfere with test results, maintaining the accuracy and reliability of diagnostic tests.
Free MLPAO Standards of Practice Questions and Answers
Laboratory specimens are labeled with all of the following EXCEPT: