Clinical Chemistry Assessment 1 –
Predictor Exam Questions and
Answers
Diagnostic specificity is the:
a) Ability of a test to correctly identify the absence of a given disease or condition
b) Chance an individual does not have a given disease or condition if the test is within the
reference interval
c) Chance of an individual having a given disease or condition if the test is abnormal
d) Ability of a test to detect a given disease or condition - correct answer: a) Ability of a test to
correctly identify the absence of a given disease or condition
One of 3 quality-control results for an instrument violates the 12s rule. What is the proper
course of action ?
a) Continue to run samples but mark the results as 'pending QC' approval
b) Use a back-up instrument for running patient specimens until resolution of the problem
c) Refrain from running patient specimens until resolution of the problem
, d) Because the 12s rule s only a warning, continue running patient specimens - correct answer:
c Refrain from running patient specimens until resolution of the problem
Which of the following explains the primary use of Levey-Jennings charts.
a) Determination of the best-fit line through a large set of data points
b) Generation of a standard curve from which information about a sample, such as
concentration
c) Identification of outliers, trends and shifts in data that may indicate a malfunction or other
problem
d) Maintenance of laboratory equipment in compliance with International Sensitivity Index (ISI)
- correct answer: c) Identification of outliers, trends and shifts in data that may indicate a
malfunction or other problem
- correct answer: Diagram
What Westgard Rule is violated in this chart?
a) Rule 12Sb
b) Rule 13S
c) Rule 22S
d) Rule R4S - correct answer:
The systematic monitoring of analytic processes to detect analytic errors that occur during
analysis and to ultimately prevent the reporting of incorrect patient test results is referred to as:
Predictor Exam Questions and
Answers
Diagnostic specificity is the:
a) Ability of a test to correctly identify the absence of a given disease or condition
b) Chance an individual does not have a given disease or condition if the test is within the
reference interval
c) Chance of an individual having a given disease or condition if the test is abnormal
d) Ability of a test to detect a given disease or condition - correct answer: a) Ability of a test to
correctly identify the absence of a given disease or condition
One of 3 quality-control results for an instrument violates the 12s rule. What is the proper
course of action ?
a) Continue to run samples but mark the results as 'pending QC' approval
b) Use a back-up instrument for running patient specimens until resolution of the problem
c) Refrain from running patient specimens until resolution of the problem
, d) Because the 12s rule s only a warning, continue running patient specimens - correct answer:
c Refrain from running patient specimens until resolution of the problem
Which of the following explains the primary use of Levey-Jennings charts.
a) Determination of the best-fit line through a large set of data points
b) Generation of a standard curve from which information about a sample, such as
concentration
c) Identification of outliers, trends and shifts in data that may indicate a malfunction or other
problem
d) Maintenance of laboratory equipment in compliance with International Sensitivity Index (ISI)
- correct answer: c) Identification of outliers, trends and shifts in data that may indicate a
malfunction or other problem
- correct answer: Diagram
What Westgard Rule is violated in this chart?
a) Rule 12Sb
b) Rule 13S
c) Rule 22S
d) Rule R4S - correct answer:
The systematic monitoring of analytic processes to detect analytic errors that occur during
analysis and to ultimately prevent the reporting of incorrect patient test results is referred to as:
