BOC Prep Questions and Answers with
Verified Solutions
What is the primary purpose of quality control in a lab?
✔✔The primary purpose of quality control is to ensure the accuracy and reliability of test results,
maintaining consistency and reliability in lab procedures.
How can you reduce contamination risk during sample collection?
✔✔Using proper aseptic techniques, wearing protective gloves, and ensuring sterile equipment
are key to reducing contamination risks.
Why is it important to properly label all specimens?
✔✔Proper labeling prevents mix-ups, ensures accurate results, and helps track each sample
throughout the testing process.
What is the function of a centrifuge in the laboratory?
✔✔A centrifuge separates different components of a sample by spinning it at high speeds, often
used to isolate serum or plasma from blood samples.
1
,How would you calibrate laboratory equipment?
✔✔Calibration involves adjusting the equipment according to standardized values, using
calibration tools to ensure accurate measurements.
Why is patient identification crucial in the lab?
✔✔Correct patient identification ensures test results are matched to the right individual, which is
essential for proper diagnosis and treatment.
What is the purpose of a control sample in laboratory tests?
✔✔A control sample verifies the accuracy of the test procedure by providing known values to
compare with patient results.
How can you prevent errors when using pipettes?
✔✔Use pipettes correctly by pre-wetting the tip, maintaining a steady hand, and using the
correct technique to draw and dispense liquids.
What is the role of a reference range in laboratory testing?
✔✔A reference range provides a baseline for comparing test results to determine if they fall
within normal or abnormal limits.
2
,How should you handle a blood sample that needs to be transported?
✔✔Ensure the sample is securely sealed, properly labeled, and kept at the recommended
temperature during transport to maintain its integrity.
Why is documentation important in a laboratory setting?
✔✔Documentation tracks each step of the testing process, provides legal records, and ensures
consistency for future audits or reviews.
What is a common reason for hemolysis in a blood sample?
✔✔Hemolysis often occurs due to improper handling, such as rough handling, using a needle
that’s too small, or delayed separation of serum or plasma.
How do you ensure accuracy when reading test results?
✔✔Double-check results, use control samples, and verify equipment calibration to ensure
accuracy in readings.
What is the primary function of an autoclave?
3
, ✔✔An autoclave sterilizes equipment and materials using pressurized steam to kill bacteria,
viruses, and other microorganisms.
How do you handle hazardous chemicals in the lab?
✔✔Use personal protective equipment, follow proper storage protocols, and adhere to safety
data sheets to handle hazardous chemicals safely.
Why are standard operating procedures (SOPs) important in the lab?
✔✔SOPs ensure consistency, accuracy, and safety by providing step-by-step instructions for
conducting specific tests or procedures.
What are some common causes of pre-analytical errors?
✔✔Pre-analytical errors can be caused by improper sample collection, labeling issues, incorrect
storage, or delays in processing.
What is the purpose of a reagent blank in spectrophotometry?
✔✔A reagent blank corrects for any absorbance due to reagents alone, allowing for more
accurate measurement of the sample.
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Verified Solutions
What is the primary purpose of quality control in a lab?
✔✔The primary purpose of quality control is to ensure the accuracy and reliability of test results,
maintaining consistency and reliability in lab procedures.
How can you reduce contamination risk during sample collection?
✔✔Using proper aseptic techniques, wearing protective gloves, and ensuring sterile equipment
are key to reducing contamination risks.
Why is it important to properly label all specimens?
✔✔Proper labeling prevents mix-ups, ensures accurate results, and helps track each sample
throughout the testing process.
What is the function of a centrifuge in the laboratory?
✔✔A centrifuge separates different components of a sample by spinning it at high speeds, often
used to isolate serum or plasma from blood samples.
1
,How would you calibrate laboratory equipment?
✔✔Calibration involves adjusting the equipment according to standardized values, using
calibration tools to ensure accurate measurements.
Why is patient identification crucial in the lab?
✔✔Correct patient identification ensures test results are matched to the right individual, which is
essential for proper diagnosis and treatment.
What is the purpose of a control sample in laboratory tests?
✔✔A control sample verifies the accuracy of the test procedure by providing known values to
compare with patient results.
How can you prevent errors when using pipettes?
✔✔Use pipettes correctly by pre-wetting the tip, maintaining a steady hand, and using the
correct technique to draw and dispense liquids.
What is the role of a reference range in laboratory testing?
✔✔A reference range provides a baseline for comparing test results to determine if they fall
within normal or abnormal limits.
2
,How should you handle a blood sample that needs to be transported?
✔✔Ensure the sample is securely sealed, properly labeled, and kept at the recommended
temperature during transport to maintain its integrity.
Why is documentation important in a laboratory setting?
✔✔Documentation tracks each step of the testing process, provides legal records, and ensures
consistency for future audits or reviews.
What is a common reason for hemolysis in a blood sample?
✔✔Hemolysis often occurs due to improper handling, such as rough handling, using a needle
that’s too small, or delayed separation of serum or plasma.
How do you ensure accuracy when reading test results?
✔✔Double-check results, use control samples, and verify equipment calibration to ensure
accuracy in readings.
What is the primary function of an autoclave?
3
, ✔✔An autoclave sterilizes equipment and materials using pressurized steam to kill bacteria,
viruses, and other microorganisms.
How do you handle hazardous chemicals in the lab?
✔✔Use personal protective equipment, follow proper storage protocols, and adhere to safety
data sheets to handle hazardous chemicals safely.
Why are standard operating procedures (SOPs) important in the lab?
✔✔SOPs ensure consistency, accuracy, and safety by providing step-by-step instructions for
conducting specific tests or procedures.
What are some common causes of pre-analytical errors?
✔✔Pre-analytical errors can be caused by improper sample collection, labeling issues, incorrect
storage, or delays in processing.
What is the purpose of a reagent blank in spectrophotometry?
✔✔A reagent blank corrects for any absorbance due to reagents alone, allowing for more
accurate measurement of the sample.
4
