MLT laboratories and procedures Test/ MLT Laboratory
Operations BOC Exam Questions (Latest 2024/2025)
With Complete Solutions
Which of the following describes the Westgard multi-rule R4S?
A). Four consecutive control data points are within ±1s
B). Four consecutive control data points are outside ± 2s
C). One data point is +2SD and a consecutive data point is -2SD
D). Two consecutive data points fall outside the mean four times - ANSWEROne data
point is +2SD and a consecutive data point is -2SD
Which of the following chromatography systems is characterized by a stationary
phase of silica gel on a piece of glass and a mobile phase of liquid?
A). Thin-layer
B). Partition
C). Ion-exchange
D). Gas-liquid - ANSWERThin-layer
The migration rate of proteins on cellulose acetate is primarily the result of:
A). Molecular content of the protein
B). Ionic charge on the proteins
C). Concentration of the proteins
D). Type of proteins - ANSWERIonic charge on the proteins
All outpatient tests are reimbursed according to a group of code numbers which are
called:
A). Clinical Laboratory Improvement Amendments (CLIA '88 ) codes
B). Current Procedural Terminology (CPT) codes
C). Health Care Financing Administration (HCFA) codes
D). Center for Disease Control (CDC) codes - ANSWERCurrent Procedural
Terminology (CPT) codes
Which of the following descriptions best describes the term absolute value as it
would relate to leukocyte differential counts.
A). Relative % of each cell type
B). Relative % of each cell type divided by total white count
C). Relative % of each cell type multiplied by total white count
D). Specific number of each cell type divided by total white count - ANSWERRelative
% of each cell type divided by total white count
Semi-automated and automated urine chemical reagent strip readers:
A). Increase the sensitivity of the urine dipsticks
B). Increase the specificity of the urine dipsticks
C). Remove subjectivity allowing for better reproducibility
D). Guarantee the sensitivity and specificity of urine dipsticks - ANSWERRemove
subjectivity allowing for better reproducibility
,What is the basis for many types of analyses used in the clinical laboratory, such as
potentiometry, amperometry, coulometry, and polarography?
A). Chemiluminescence
B). Electrochemistry
C). Chromatography
D). Spectrophotometry - ANSWERElectrochemistry
Which of the following analytes would be decreased due to delay in centrifugation?
A). Potassium
B). Creatinine
C). Glucose
D). AST - ANSWERGlucose
Mercury covered by a layer of mercurous chloride in contact with saturated
potassium chloride solution is a description of which of the following types of
electrodes?
A). Standard hydrogen
B). Saturated Calomel
C). Redox
D). Silver/Silver chloride - ANSWERSaturated Calomel
Which of the following will cause an acidic urine pH?
A). Hyperventilation
B). Meat-filled diet
C). Vegetarian diet
D). Old urine specimen - ANSWERMeat-filled diet
All of the following are required for N95 mask use EXCEPT?
A). Men must shave their facial hair for a tight fight
B). Be fit-tested
C). Have a tuberculin skin test
D). Receive medical clearance - ANSWERHave a tuberculin skin test
Which analyte shows no difference between capillary and venous values?
A). Glucose
B). Phosphorus
C). Bilirubin
D). Calcium - ANSWERPhosphorus
All of the following are examples of amplification methods, EXCEPT:
A). Polymerase chain reaction (PCR)
B). Nucleic acid sequence-based amplification (NASBA)
C). Fluorescent in situ hybridization (FISH)
D). Transcription mediated amplification (TMA) - ANSWERFluorescent in situ
hybridization (FISH)
, How would you CORRECTLY prepare 100 mL of 0.9% isotonic saline (NaCl: GMW =
58.45)?
A). 0.9 grams in 100 mL distilled water
B). 9.0 grams in 100 mL distilled water
C). 0.526 grams in 100 mL distilled water
D). 5.84 grams in 100 mL distilled water - ANSWER0.9 grams in 100 mL distilled water
Which of the following analytes would be increased due to delay in centrifugation?
A). Glucose
B). Ionized Calcium
C). Potassium
D). Bicarbonate - ANSWERPotassium
A laboratory manager wants to evaluate the timeliness of patient services in order to
prevent medical errors caused by a delay in treatment. Measuring the turnaround
time for which of these analytes would provide the most timely and valuable
information?
A). Routine glucose tests performed on patients admitted to the medical floors.
B). Lipid panels performed by the outpatient clinic.
C). Troponin tests from the emergency department.
D). Urine creatinine clearance testing conducted on patients seen in the diabetes
clinic. - ANSWERTroponin tests from the emergency department.
How many microns are equivalent to one ocular micrometer at 40X given the
following information?
Stage micrometer: 0.4
Ocular micrometer: 53
A). 5
B). 0.50
C). 7.5
D). 0.75 - ANSWER7.5 (0.4 X 1000/53)
Which of the following barriers are recommended in microbiology laboratories
where manipulation of biosafety level 3 agents (e.g., Mycobacterium tuberculosis) is
performed?
A). Manual closing single-door access
B). Positive airflow that moves air out of the laboratory
C). Filtered and recirculated air can enter other lab areas
D). Self-closing double-door access - ANSWERSelf-closing double-door access
A well designed rating scale should have:
A). A space for "not observed"
B). An "all or none" format
C). Non-observable behaviors listed
D). More than thirty items listed - ANSWERA space for "not observed"
A slow, progressive drift of values away from the mean is called a:
Operations BOC Exam Questions (Latest 2024/2025)
With Complete Solutions
Which of the following describes the Westgard multi-rule R4S?
A). Four consecutive control data points are within ±1s
B). Four consecutive control data points are outside ± 2s
C). One data point is +2SD and a consecutive data point is -2SD
D). Two consecutive data points fall outside the mean four times - ANSWEROne data
point is +2SD and a consecutive data point is -2SD
Which of the following chromatography systems is characterized by a stationary
phase of silica gel on a piece of glass and a mobile phase of liquid?
A). Thin-layer
B). Partition
C). Ion-exchange
D). Gas-liquid - ANSWERThin-layer
The migration rate of proteins on cellulose acetate is primarily the result of:
A). Molecular content of the protein
B). Ionic charge on the proteins
C). Concentration of the proteins
D). Type of proteins - ANSWERIonic charge on the proteins
All outpatient tests are reimbursed according to a group of code numbers which are
called:
A). Clinical Laboratory Improvement Amendments (CLIA '88 ) codes
B). Current Procedural Terminology (CPT) codes
C). Health Care Financing Administration (HCFA) codes
D). Center for Disease Control (CDC) codes - ANSWERCurrent Procedural
Terminology (CPT) codes
Which of the following descriptions best describes the term absolute value as it
would relate to leukocyte differential counts.
A). Relative % of each cell type
B). Relative % of each cell type divided by total white count
C). Relative % of each cell type multiplied by total white count
D). Specific number of each cell type divided by total white count - ANSWERRelative
% of each cell type divided by total white count
Semi-automated and automated urine chemical reagent strip readers:
A). Increase the sensitivity of the urine dipsticks
B). Increase the specificity of the urine dipsticks
C). Remove subjectivity allowing for better reproducibility
D). Guarantee the sensitivity and specificity of urine dipsticks - ANSWERRemove
subjectivity allowing for better reproducibility
,What is the basis for many types of analyses used in the clinical laboratory, such as
potentiometry, amperometry, coulometry, and polarography?
A). Chemiluminescence
B). Electrochemistry
C). Chromatography
D). Spectrophotometry - ANSWERElectrochemistry
Which of the following analytes would be decreased due to delay in centrifugation?
A). Potassium
B). Creatinine
C). Glucose
D). AST - ANSWERGlucose
Mercury covered by a layer of mercurous chloride in contact with saturated
potassium chloride solution is a description of which of the following types of
electrodes?
A). Standard hydrogen
B). Saturated Calomel
C). Redox
D). Silver/Silver chloride - ANSWERSaturated Calomel
Which of the following will cause an acidic urine pH?
A). Hyperventilation
B). Meat-filled diet
C). Vegetarian diet
D). Old urine specimen - ANSWERMeat-filled diet
All of the following are required for N95 mask use EXCEPT?
A). Men must shave their facial hair for a tight fight
B). Be fit-tested
C). Have a tuberculin skin test
D). Receive medical clearance - ANSWERHave a tuberculin skin test
Which analyte shows no difference between capillary and venous values?
A). Glucose
B). Phosphorus
C). Bilirubin
D). Calcium - ANSWERPhosphorus
All of the following are examples of amplification methods, EXCEPT:
A). Polymerase chain reaction (PCR)
B). Nucleic acid sequence-based amplification (NASBA)
C). Fluorescent in situ hybridization (FISH)
D). Transcription mediated amplification (TMA) - ANSWERFluorescent in situ
hybridization (FISH)
, How would you CORRECTLY prepare 100 mL of 0.9% isotonic saline (NaCl: GMW =
58.45)?
A). 0.9 grams in 100 mL distilled water
B). 9.0 grams in 100 mL distilled water
C). 0.526 grams in 100 mL distilled water
D). 5.84 grams in 100 mL distilled water - ANSWER0.9 grams in 100 mL distilled water
Which of the following analytes would be increased due to delay in centrifugation?
A). Glucose
B). Ionized Calcium
C). Potassium
D). Bicarbonate - ANSWERPotassium
A laboratory manager wants to evaluate the timeliness of patient services in order to
prevent medical errors caused by a delay in treatment. Measuring the turnaround
time for which of these analytes would provide the most timely and valuable
information?
A). Routine glucose tests performed on patients admitted to the medical floors.
B). Lipid panels performed by the outpatient clinic.
C). Troponin tests from the emergency department.
D). Urine creatinine clearance testing conducted on patients seen in the diabetes
clinic. - ANSWERTroponin tests from the emergency department.
How many microns are equivalent to one ocular micrometer at 40X given the
following information?
Stage micrometer: 0.4
Ocular micrometer: 53
A). 5
B). 0.50
C). 7.5
D). 0.75 - ANSWER7.5 (0.4 X 1000/53)
Which of the following barriers are recommended in microbiology laboratories
where manipulation of biosafety level 3 agents (e.g., Mycobacterium tuberculosis) is
performed?
A). Manual closing single-door access
B). Positive airflow that moves air out of the laboratory
C). Filtered and recirculated air can enter other lab areas
D). Self-closing double-door access - ANSWERSelf-closing double-door access
A well designed rating scale should have:
A). A space for "not observed"
B). An "all or none" format
C). Non-observable behaviors listed
D). More than thirty items listed - ANSWERA space for "not observed"
A slow, progressive drift of values away from the mean is called a:
