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WorksheetsWorksheet Questions
Total questions: 50
Worksheet time: 25mins
When collecting a sample for a rapid strep screen, two swabs are often collected. The second swab may be used for a(an) ____________ to confirm the presence of Streptococcus sp.
COVID-19 test
Influenza test
Mono spot
Throat culture
What are the CLIA '88 recommendations for QC when patient samples are tested?
At least once per day using two levels of control material
At least two times per day using two levels of control material
One time per week using two levels of control material
With each patient sample using two levels of control material
What is the best resource to determine how to safely clean up a small spill of a commercially prepared chemical and assess any hazards created by the spill?
Bill of Lading
GHS pictogram
NFPA Hazard Communication
SDS for the specific chemical
Streptococcus sp. can be identified with a positive:
COVID-19 test
Mono spot
RSV test
Throat culture
Why is it important to monitor the temperature and humidity in the laboratory setting?
To ensure the accuracy of the test, calibrators, and controls
To maintain a comfortable room temperature for the employees in the laboratory
To prevent the analyzer from overheating
To watch for fluctuations in the temperature on each shift
Which of the following is true regarding the GHS system?
This system allows for consistency in hazard identification in the U.S. only
This system allows for consistency in hazard identification internationally
This system uses pictograms only to communicate hazards
This system uses SDSs as the only tool for identifying hazards
Which infection control practice breaks the chain of infection by preventing contamination of the surrounding area by an infected host?
Antimicrobial stewardship
Disinfecting laboratory benchtops
Vaccination
Wearing a surgical mask
A medical laboratory assistant has orders to collect a sample by venipuncture in an isolation room. Which of the following should be the medical laboratory assistant's first step?
Call for assistance
Find the correct size gown
Read the posted isolation requirements
Retrieve a respirator
The SOP for a pregnancy test says to read results between 3-10 minutes. The medical laboratory assistant gets distracted and reads the test results after 20 minutes. Can they report the results?
No, only a negative result can be reported at 20 minutes
No, the results are invalid
Yes, a positive result at 20 minutes is accurate
Yes, if the test line is dark
A waived COVID-19 test instructs incubation for 15 minutes, but the lab technician only incubated the COVID-19 test for 5 minutes. What should the medical laboratory assistant do?
Let the manager of the laboratory decide based on the patient's symptoms
Perform a new test following the manufacturer's instructions
Process the test, because a positive result is still accurate
Report the negative result because a negative result wouldn't be affected by a short incubation
Which category of laboratory testing is exempt from proficiency testing?
Basic tests
Complex test
Mandatory tests
Waived tests
What is the name for the guidelines that preceded standard precautions and focused on limiting healthcare workers' exposure to blood and other potentially infectious materials (OPIM)?
Chemical Hygiene Plans
Contact Precautions
Electrical Hazards Plan
Universal Precautions
The square root of the variance of values in a series of test results is known as the:
confidence interval.
normal value.
reference range.
standard deviation.
Which of the following infection control practices for venipuncture breaks the chain of infection by disrupting contact transmission?
Antimicrobial stewardship
Disinfecting surface
Vaccination
Washing hands
Which of the following employer plans mandated by OSHA standards serves to protect laboratory workers from chemical hazards?
Chemical hygiene plan
Emergency action plan
Exposure control plan
Fire prevention plan
Which of the following is a federally mandated law that medical laboratories must comply with?
CLSI Standards for the Collection of Blood by Venipuncture
NAACLS Accreditation Standards
OSHA Occupational Exposure to Bloodborne Pathogens Program
Westgard Rules
What hazard does the health hazard pictogram indicate?
Acute toxicity
Carcinogen
Minor irritation
Pyrophoric
To determine the acceptable control range, an aliquot of the control should be tested daily for:
6–10 days
10–15 days
15–25 days
50–100 days
How are transmission-based precautions different from standard precautions?
Standard precautions apply to all patients and patient samples while transmission-based precautions may not
Standard precautions are written into law while transmission-based precautions are recommendations from the CDC
Standard precautions have been replaced by transmission-based precautions and are now considered best practice
Standard precautions recommend additional protective measures when handling patients with particular illnesses while transmission-based precautions do not
Which document provides the chemical properties of a reagent used in the laboratory?
Exposure control plan
Laboratory policy
Safety Data Sheet
Standard operating procedure
The environment or habitat that a pathogen may occupy is best described by which component of the chain of infection?
Mode of transmission
Portal of entry
Portal of exit
Reservoir or source
What is the technique of killing or destroying all microorganisms including bacterial spores?
Antisepsis
Disinfection
Filtration
Sterilization
The mathematical average of a set of values is called the:
mean value
median quantity
middle denomination
mode number
Which of the following transmission-based precautions would be applied to a hospital inpatient with an infection that could be transmitted from skin to skin?
Airborne
Contact
Droplet
Reverse
Five consecutive control results fall on the same side of the mean. This suggests the:
control is working properly
mean should be recalculated
reagent may be deteriorating
value was plotted on the wrong chart
Which of the following changes a waived COVID-19 test designed for use in adults to a high-complexity test?
Performing multiple tests at the same time
Performing the test on a large sample volume
Performing the test on a pediatric patient
Performing the test on a symptomatic patient
Exposure control plans, employee training, and provision of hepatitis B vaccine are all components of which OSHA Standard?
Bloodborne pathogens standard
Fire protection standard
Hazard communication standard
Laboratory safety standard
Which of the following is an accepted practice for a medical laboratory assistant to use when collecting a sample by venipuncture from a patient under protective isolation precautions?
Bring a well-stocked phlebotomy tray into the patient room
Remove PPE before leaving the patient room
Wear chemically cleaned, but not sterile, PPE
Wear the provided sterile PPE into the patient room
Which entity identifies companies that meet the criteria needed for being a provider of proficiency testing?
CAP
CMS
FDA
TJC
What statistical method should be used to assess the difference in precision between two similar assays?
Calculation of the coefficient of variance
Calculation of the mean value
Calculation of the standard deviation
Measurement of the SD index
Biohazards can be defined as:
corrosive chemicals
explosive gases
flammable substances
potentially infectious agents
How often should the glucose analyzer be calibrated?
Annually to maintain testing integrity
Based on the manufacturer’s recommendations or at least once every six months
Daily or prior to running patient samples
On the first day of the month for consistency
Which of the following statements is true regarding standard precautions?
They are applied based on a patient’s known condition
They are dated guidelines that have been replaced by Universal Precautions
They are observed when handling all patients and specimens
They are currently mandated by a program administered by the CDC
Which of the following is considered off-label use of a waived urine pregnancy test?
Testing expired urine
Testing multiple urine samples at once
Testing patient serum
Testing refrigerated urine
Which of the following is a comprehensive set of policies, procedures, and practices that ensures a laboratory’s results are reliable?
Quality affirmation
Quality assurance
Quality control
Quality guarantee
The accuracy of an obtained result describes how:
close the result is to the actual value
precise the result is to the actual value
repeatable the result is to the actual value
When performing morning QC, the Level 1 control value is outside the established range while the Level 2 control value is in range. What is the next step?
Perform patient testing if the Level 1 QC material from yesterday was acceptable
Perform patient testing since Level 2 QC values are in range
Repeat both Level 1 and Level 2 QC material prior to testing patient samples
Repeat Level 1 QC before testing the patient samples
Which organization offers guidelines and regulations that provide the framework for a healthcare facility’s exposure control plan?
DOT
GHS
NFPA
OSHA
Which of the following best describes the definition of a standard deviation?
The difference of an observed value in relation to the mean value
The measure of the variability in a given data set
The percent variation of a given data set
The value that occurs most frequently in a given data set
A COVID-19 test kit directions says to use a nasopharyngeal swab. Can a throat swab be used as a substitute?
No, because a throat swab would have too much saliva
No, the specimen indicated in the manufacturer’s directions must be used
Yes, a throat swab is virtually the same as a nasopharyngeal swab
Yes, if the test is positive, it does not matter where the specimen came from
Seminal fluid collected in sterile or chemically clean containers must be:
added to a preservative immediately after collection.
frozen immediately after collection.
kept warm and protected from light.
refrigerated until the laboratory is ready to test.
A patient brought a urine sample in a plastic container from home for urine culture and sensitivity. What action should the CMLA take?
Accept the sample and pour it into a labeled sterile urine container
Accept the sample and make a note about the container in the LIS
Reject the sample and give the patient a sterile urine container and collection instructions
Reject the sample and make a note about the container in the LIS
A CMLA needs to collect a capillary blood sample, but the patient has cold fingers. To get a good sample, the CMLA should:
apply pressure to the fingertip before the puncture.
massage the entire hand to improve circulation.
have the patient clench and unclench their fist repeatedly.
warm the fingertip to increase blood flow.
To prepare slides for Gram stain, make a smear on a glass slide and then ________ the smear.
blot
fix
rinse
wash
Should a CMLA accept or reject a half-full light blue top tube with an order for a Prothrombin Time (PT)?
Accept the sample because an improper sample-to-anticoagulant ratio is no concern for PT testing
Accept the sample, regardless of volume, because it was difficult to draw blood from the patient
Reject the sample because blood in a light blue tube does not yield the correct sample type for PT testing
Reject the sample because an improper sample-to-anticoagulant ratio will alter the PT results
Plasma contains ________________, serum does not.
Clot activators
Clotting factors
Red blood cells
White blood cells
The __________________ is considered the vein of choice for venipuncture.
basilic
median cubital
radial
subclavian
According to CLSI guidelines, blood must be centrifuged to separate the serum/plasma from the cells within _____ hours to prevent some analyte values from being affected.
one
two
three
five
Venipuncture order of draw is used to prevent:
additive carryover between evacuated tubes.
hemoconcentration that can alter test results.
insufficient samples for coagulation testing.
repeat collections from clots.
Some winged infusion sets come with Luer adapters for multisample draws. The CMLA could remove the multisample adapter to use the winged infusion set with a(n):
evacuated tube adapter
lancet
syringe
transfer device
