SKML Feces-chemie Certification
Practice Questions
Section 1: Quality Control & Internal Controls (Questions 1–40)
Question 1: During a reagent lot change, a laboratory professional is addressing internal
controls, run acceptance and recognition of systematic or random error with decisions and the
consequence of error could be significant. What should be done first?
A) Proceed using the usual method without rechecking the changed condition.
B) Record only the final outcome and omit the basis for the decision.
C) Rely on a single assumption because it worked in a previous situation.
D) Verify the applicable requirement, current condition, and acceptance criteria before acting.
Answer: D
*Rationale:* A sound first step for internal controls, run acceptance and recognition of
systematic or random error with decisions is to establish the requirement and actual condition.
That prevents later actions from being built on an unverified assumption.
Question 2: During external-quality sample processing, which review question is most useful for
preventing recurrence of a problem?
A) Who can be assigned responsibility so the issue can be closed quickly?
B) How can the event description be shortened to reduce review time?
C) Which existing record can be copied to complete the investigation faster?
D) What condition or system weakness allowed the problem to occur, escape detection, or recur
despite existing controls?
Answer: D
*Rationale:* Prevention focuses on the system conditions that allowed the problem to occur or
escape, not simply on assigning blame.
Question 3: Before repeating a measurement, how should a laboratory professional balance
speed and reliability when performing peer-group, target-value, bias, z-score or allowable-error
interpretation?
A) Prioritize speed whenever the task is routine, even if verification is reduced.
B) Use the most efficient approach that still preserves required controls, verification, traceability,
and acceptance criteria.
C) Use the most detailed possible process regardless of risk or relevance.
D) Defer documentation and verification whenever the schedule is under pressure.
,Answer: B
*Rationale:* Efficiency is appropriate only when the controls needed for reliable, traceable,
acceptable performance remain intact.
Question 4: While reviewing calibration performance, which review question is most useful for
preventing recurrence of a problem in investigation of unacceptable performance using reagent,
instrument and operator evidence?
A) Who can be assigned responsibility so the issue can be closed quickly?
B) What condition or system weakness allowed the problem to occur, escape detection, or recur
despite existing controls?
C) How can the event description be shortened to reduce review time?
D) Which existing record can be copied to complete the investigation faster?
Answer: B
*Rationale:* Prevention focuses on the system conditions that allowed the problem to occur or
escape, not simply on assigning blame.
Question 5: While investigating discordant results, how should a laboratory professional balance
speed and reliability when performing corrective action, verification with fresh controls and
prevention of recurrence?
A) Prioritize speed whenever the task is routine, even if verification is reduced.
B) Use the most efficient approach that still preserves required controls, verification, traceability,
and acceptance criteria.
C) Use the most detailed possible process regardless of risk or relevance.
D) Defer documentation and verification whenever the schedule is under pressure.
Answer: B
*Rationale:* Efficiency is appropriate only when the controls needed for reliable, traceable,
acceptable performance remain intact.
Question 6: During sample receipt, how should uncertainty affecting peer-group, target-value,
bias, z-score or allowable-error interpretation be handled?
A) Ignore uncertainty unless it has already caused a failure.
B) Identify the uncertainty, determine whether it could change the decision, obtain more
evidence where practical, and document any residual limitation.
C) Choose the most optimistic interpretation so the process can continue.
D) Convert the uncertainty into a fixed value without further evaluation.
Answer: B
*Rationale:* Uncertainty should be identified, evaluated for its potential impact on decisions, and
documented.
Question 7: Before releasing a patient result, which evidence best supports a defensible
decision about unit, reference interval, qualitative-category and result-transcription accuracy?
,A) An undocumented recollection of how a similar task was handled.
B) Historical information from an unrelated process with different conditions.
C) A partial record that omits the observation most relevant to the decision.
D) Current, traceable evidence that directly addresses the relevant acceptance criteria.
Answer: D
*Rationale:* Evidence should be current, traceable, and directly linked to the criteria being
evaluated.
Question 8: During instrument troubleshooting, which evidence best supports a defensible
decision about corrective action, verification with fresh controls and prevention of recurrence?
A) An undocumented recollection of how a similar task was handled.
B) Current, traceable evidence that directly addresses the relevant acceptance criteria.
C) Historical information from an unrelated process with different conditions.
D) A partial record that omits the observation most relevant to the decision.
Answer: B
*Rationale:* Evidence should be current, traceable, and directly linked to the criteria being
evaluated.
Question 9: While trending quality-control data, which indicator would best show whether work
on pre-analytical stability, transport, preparation and sample-identity controls remains under
control?
A) The number of tasks completed, regardless of errors or rework.
B) A single favorable observation selected after the work is finished.
C) An informal impression that performance seems similar to last month.
D) A relevant measure trended against defined acceptance limits, with investigation of
meaningful changes.
Answer: D
*Rationale:* Monitoring is strongest when a relevant indicator is trended against explicit limits
and significant changes are investigated.
Question 10: After a pre-analytical deviation, which action best supports continuous
improvement of method principle, calibration model, analytical range and interference risks?
A) Use trend and event data to identify recurring weaknesses, prioritize meaningful changes,
and verify whether the change improves performance.
B) Change the procedure whenever a single isolated issue occurs, without trend review.
C) Focus only on increasing throughput because speed is the clearest performance measure.
D) Wait until a major failure occurs before considering process improvement.
Answer: A
*Rationale:* Improvement should be evidence-led, risk-prioritized, and followed by verification
that performance actually improved.
, Question 11: Before releasing a patient result, a proposed shortcut affects measurand or analyte
definition, specimen matrix and clinical purpose stated in the title. Which consideration should
carry the greatest weight?
A) Whether the shortcut is faster than the documented method.
B) Whether another team has used a similar shortcut informally.
C) Whether the shortcut reduces the amount of documentation required.
D) Whether the shortcut preserves the required controls, evidence, acceptance criteria, and
safety or quality outcome.
Answer: D
*Rationale:* A shortcut is acceptable only if it preserves the controls and evidence required;
convenience alone is not a sufficient basis.
Question 12: While reviewing calibration performance, which observation most strongly
indicates that internal controls, run acceptance and recognition of systematic or random error
with decisions needs immediate review?
A) A minor cosmetic difference that has no effect on function or acceptance criteria.
B) An unchanged value that remains well within its expected range.
C) A routine administrative delay with no effect on the controlled process.
D) A change that crosses an acceptance limit or could materially affect safety, quality, validity, or
downstream decisions.
Answer: D
*Rationale:* Immediate review is warranted when a change can affect an acceptance limit or a
material outcome.
Question 13: During external-quality sample processing, which communication is most useful
when escalating an issue involving internal controls, run acceptance and recognition of
systematic or random error?
A) Report only that there is a problem and wait for others to determine the details.
B) Send all available records without highlighting the relevant evidence or requested decision.
C) Delay communication until every possible cause has been eliminated.
D) State the observed condition, supporting evidence, risk or impact, actions already taken, and
the decision needed.
Answer: D
*Rationale:* Clear escalation gives decision-makers the condition, evidence, impact, actions,
and required decision.
Question 14: Before repeating a measurement, which response best protects quality when
workload pressure affects external-quality sample processing without inappropriate collaboration
or special treatment?
Practice Questions
Section 1: Quality Control & Internal Controls (Questions 1–40)
Question 1: During a reagent lot change, a laboratory professional is addressing internal
controls, run acceptance and recognition of systematic or random error with decisions and the
consequence of error could be significant. What should be done first?
A) Proceed using the usual method without rechecking the changed condition.
B) Record only the final outcome and omit the basis for the decision.
C) Rely on a single assumption because it worked in a previous situation.
D) Verify the applicable requirement, current condition, and acceptance criteria before acting.
Answer: D
*Rationale:* A sound first step for internal controls, run acceptance and recognition of
systematic or random error with decisions is to establish the requirement and actual condition.
That prevents later actions from being built on an unverified assumption.
Question 2: During external-quality sample processing, which review question is most useful for
preventing recurrence of a problem?
A) Who can be assigned responsibility so the issue can be closed quickly?
B) How can the event description be shortened to reduce review time?
C) Which existing record can be copied to complete the investigation faster?
D) What condition or system weakness allowed the problem to occur, escape detection, or recur
despite existing controls?
Answer: D
*Rationale:* Prevention focuses on the system conditions that allowed the problem to occur or
escape, not simply on assigning blame.
Question 3: Before repeating a measurement, how should a laboratory professional balance
speed and reliability when performing peer-group, target-value, bias, z-score or allowable-error
interpretation?
A) Prioritize speed whenever the task is routine, even if verification is reduced.
B) Use the most efficient approach that still preserves required controls, verification, traceability,
and acceptance criteria.
C) Use the most detailed possible process regardless of risk or relevance.
D) Defer documentation and verification whenever the schedule is under pressure.
,Answer: B
*Rationale:* Efficiency is appropriate only when the controls needed for reliable, traceable,
acceptable performance remain intact.
Question 4: While reviewing calibration performance, which review question is most useful for
preventing recurrence of a problem in investigation of unacceptable performance using reagent,
instrument and operator evidence?
A) Who can be assigned responsibility so the issue can be closed quickly?
B) What condition or system weakness allowed the problem to occur, escape detection, or recur
despite existing controls?
C) How can the event description be shortened to reduce review time?
D) Which existing record can be copied to complete the investigation faster?
Answer: B
*Rationale:* Prevention focuses on the system conditions that allowed the problem to occur or
escape, not simply on assigning blame.
Question 5: While investigating discordant results, how should a laboratory professional balance
speed and reliability when performing corrective action, verification with fresh controls and
prevention of recurrence?
A) Prioritize speed whenever the task is routine, even if verification is reduced.
B) Use the most efficient approach that still preserves required controls, verification, traceability,
and acceptance criteria.
C) Use the most detailed possible process regardless of risk or relevance.
D) Defer documentation and verification whenever the schedule is under pressure.
Answer: B
*Rationale:* Efficiency is appropriate only when the controls needed for reliable, traceable,
acceptable performance remain intact.
Question 6: During sample receipt, how should uncertainty affecting peer-group, target-value,
bias, z-score or allowable-error interpretation be handled?
A) Ignore uncertainty unless it has already caused a failure.
B) Identify the uncertainty, determine whether it could change the decision, obtain more
evidence where practical, and document any residual limitation.
C) Choose the most optimistic interpretation so the process can continue.
D) Convert the uncertainty into a fixed value without further evaluation.
Answer: B
*Rationale:* Uncertainty should be identified, evaluated for its potential impact on decisions, and
documented.
Question 7: Before releasing a patient result, which evidence best supports a defensible
decision about unit, reference interval, qualitative-category and result-transcription accuracy?
,A) An undocumented recollection of how a similar task was handled.
B) Historical information from an unrelated process with different conditions.
C) A partial record that omits the observation most relevant to the decision.
D) Current, traceable evidence that directly addresses the relevant acceptance criteria.
Answer: D
*Rationale:* Evidence should be current, traceable, and directly linked to the criteria being
evaluated.
Question 8: During instrument troubleshooting, which evidence best supports a defensible
decision about corrective action, verification with fresh controls and prevention of recurrence?
A) An undocumented recollection of how a similar task was handled.
B) Current, traceable evidence that directly addresses the relevant acceptance criteria.
C) Historical information from an unrelated process with different conditions.
D) A partial record that omits the observation most relevant to the decision.
Answer: B
*Rationale:* Evidence should be current, traceable, and directly linked to the criteria being
evaluated.
Question 9: While trending quality-control data, which indicator would best show whether work
on pre-analytical stability, transport, preparation and sample-identity controls remains under
control?
A) The number of tasks completed, regardless of errors or rework.
B) A single favorable observation selected after the work is finished.
C) An informal impression that performance seems similar to last month.
D) A relevant measure trended against defined acceptance limits, with investigation of
meaningful changes.
Answer: D
*Rationale:* Monitoring is strongest when a relevant indicator is trended against explicit limits
and significant changes are investigated.
Question 10: After a pre-analytical deviation, which action best supports continuous
improvement of method principle, calibration model, analytical range and interference risks?
A) Use trend and event data to identify recurring weaknesses, prioritize meaningful changes,
and verify whether the change improves performance.
B) Change the procedure whenever a single isolated issue occurs, without trend review.
C) Focus only on increasing throughput because speed is the clearest performance measure.
D) Wait until a major failure occurs before considering process improvement.
Answer: A
*Rationale:* Improvement should be evidence-led, risk-prioritized, and followed by verification
that performance actually improved.
, Question 11: Before releasing a patient result, a proposed shortcut affects measurand or analyte
definition, specimen matrix and clinical purpose stated in the title. Which consideration should
carry the greatest weight?
A) Whether the shortcut is faster than the documented method.
B) Whether another team has used a similar shortcut informally.
C) Whether the shortcut reduces the amount of documentation required.
D) Whether the shortcut preserves the required controls, evidence, acceptance criteria, and
safety or quality outcome.
Answer: D
*Rationale:* A shortcut is acceptable only if it preserves the controls and evidence required;
convenience alone is not a sufficient basis.
Question 12: While reviewing calibration performance, which observation most strongly
indicates that internal controls, run acceptance and recognition of systematic or random error
with decisions needs immediate review?
A) A minor cosmetic difference that has no effect on function or acceptance criteria.
B) An unchanged value that remains well within its expected range.
C) A routine administrative delay with no effect on the controlled process.
D) A change that crosses an acceptance limit or could materially affect safety, quality, validity, or
downstream decisions.
Answer: D
*Rationale:* Immediate review is warranted when a change can affect an acceptance limit or a
material outcome.
Question 13: During external-quality sample processing, which communication is most useful
when escalating an issue involving internal controls, run acceptance and recognition of
systematic or random error?
A) Report only that there is a problem and wait for others to determine the details.
B) Send all available records without highlighting the relevant evidence or requested decision.
C) Delay communication until every possible cause has been eliminated.
D) State the observed condition, supporting evidence, risk or impact, actions already taken, and
the decision needed.
Answer: D
*Rationale:* Clear escalation gives decision-makers the condition, evidence, impact, actions,
and required decision.
Question 14: Before repeating a measurement, which response best protects quality when
workload pressure affects external-quality sample processing without inappropriate collaboration
or special treatment?
