, Question 1
Which of the following best explains why a patient with a history of recurrent
Clostridioides difficile infection should not be placed on standard precautions
alone?
A. C. difficile spores are resistant to alcohol-based hand rubs, requiring
soap and water handwashing and contact precautions.
B. C. difficile is transmitted via airborne droplets, necessitating an N95
respirator.
C. C. difficile requires reverse isolation due to neutropenia risk.
D. C. difficile is a bloodborne pathogen requiring double gloving.
Correct Answer: A - C. difficile spores are resistant to
alcohol-based hand rubs, requiring soap and water handwashing
and contact precautions.
RATIONALE
C. difficile spores are not killed by alcohol-based hand rubs; soap and
water is required, along with contact precautions. Airborne, reverse,
and bloodborne precautions are not indicated for C. difficile.
Question 2
A patient's arterial blood gas shows pH 7.28, PaCO2 55 mm Hg, and HCO3-
24 mEq/L. Which acid-base imbalance is present?
A. Metabolic acidosis
B. Respiratory acidosis
C. Metabolic alkalosis
D. Respiratory alkalosis
Correct Answer: B - Respiratory acidosis
Page 2
, RATIONALE
Uncompensated respiratory acidosis is indicated by low pH, elevated
PaCO2, and normal HCO3-. Metabolic acidosis would show low
HCO3-, while alkalosis would show elevated pH.
Question 3
When performing a 12-lead EKG, which electrode placement error would most
likely produce a falsely inverted P wave in lead II?
A. Reversing the right arm and left arm electrodes
B. Placing V1 and V2 electrodes on the wrong intercostal spaces
C. Reversing the left arm and left leg electrodes
D. Placing the right leg electrode on the left leg
Correct Answer: A - Reversing the right arm and left arm
electrodes
RATIONALE
Reversing right and left arm electrodes inverts lead I and often lead II,
causing a falsely inverted P wave. Other misplacements affect
different leads or have less consistent effects.
Question 4
A provider orders 0.5 mg of a medication. The available concentration is 0.25
mg/mL. How many milliliters should the medical assistant administer?
A. 0.5 mL
B. 1 mL
C. 2 mL
D. 2.5 mL
Correct Answer: C - 2 mL
Page 3
, RATIONALE
Using the formula: volume = dose / concentration = 0.5 mg / 0.25
mg/mL = 2 mL. The other options result from calculation errors.
Question 5
Which of the following is the most appropriate action when a medical assistant
witnesses a colleague performing a procedure without informed consent?
A. Ignore the situation to avoid conflict.
B. Report the incident to the supervising provider or risk manager
immediately.
C. Ask the patient to sign the consent form after the procedure.
D. Document the omission in the patient's chart without notifying anyone.
Correct Answer: B - Report the incident to the supervising
provider or risk manager immediately.
RATIONALE
Informed consent is a legal and ethical requirement; witnessing a
violation must be reported to the appropriate authority. Ignoring,
obtaining retroactive consent, or merely documenting without
reporting fails to protect the patient and violates professional
standards.
Question 6
Which of the following describes the correct technique for obtaining a capillary
blood specimen for a glucose test from an adult patient?
A. Puncture the central pad of the fingertip.
B. Puncture the side of the fingertip, avoiding the central pad.
C. Puncture the earlobe for better perfusion.
D. Puncture the heel of the hand.
Correct Answer: B - Puncture the side of the fingertip, avoiding
the central pad.
Page 4
Which of the following best explains why a patient with a history of recurrent
Clostridioides difficile infection should not be placed on standard precautions
alone?
A. C. difficile spores are resistant to alcohol-based hand rubs, requiring
soap and water handwashing and contact precautions.
B. C. difficile is transmitted via airborne droplets, necessitating an N95
respirator.
C. C. difficile requires reverse isolation due to neutropenia risk.
D. C. difficile is a bloodborne pathogen requiring double gloving.
Correct Answer: A - C. difficile spores are resistant to
alcohol-based hand rubs, requiring soap and water handwashing
and contact precautions.
RATIONALE
C. difficile spores are not killed by alcohol-based hand rubs; soap and
water is required, along with contact precautions. Airborne, reverse,
and bloodborne precautions are not indicated for C. difficile.
Question 2
A patient's arterial blood gas shows pH 7.28, PaCO2 55 mm Hg, and HCO3-
24 mEq/L. Which acid-base imbalance is present?
A. Metabolic acidosis
B. Respiratory acidosis
C. Metabolic alkalosis
D. Respiratory alkalosis
Correct Answer: B - Respiratory acidosis
Page 2
, RATIONALE
Uncompensated respiratory acidosis is indicated by low pH, elevated
PaCO2, and normal HCO3-. Metabolic acidosis would show low
HCO3-, while alkalosis would show elevated pH.
Question 3
When performing a 12-lead EKG, which electrode placement error would most
likely produce a falsely inverted P wave in lead II?
A. Reversing the right arm and left arm electrodes
B. Placing V1 and V2 electrodes on the wrong intercostal spaces
C. Reversing the left arm and left leg electrodes
D. Placing the right leg electrode on the left leg
Correct Answer: A - Reversing the right arm and left arm
electrodes
RATIONALE
Reversing right and left arm electrodes inverts lead I and often lead II,
causing a falsely inverted P wave. Other misplacements affect
different leads or have less consistent effects.
Question 4
A provider orders 0.5 mg of a medication. The available concentration is 0.25
mg/mL. How many milliliters should the medical assistant administer?
A. 0.5 mL
B. 1 mL
C. 2 mL
D. 2.5 mL
Correct Answer: C - 2 mL
Page 3
, RATIONALE
Using the formula: volume = dose / concentration = 0.5 mg / 0.25
mg/mL = 2 mL. The other options result from calculation errors.
Question 5
Which of the following is the most appropriate action when a medical assistant
witnesses a colleague performing a procedure without informed consent?
A. Ignore the situation to avoid conflict.
B. Report the incident to the supervising provider or risk manager
immediately.
C. Ask the patient to sign the consent form after the procedure.
D. Document the omission in the patient's chart without notifying anyone.
Correct Answer: B - Report the incident to the supervising
provider or risk manager immediately.
RATIONALE
Informed consent is a legal and ethical requirement; witnessing a
violation must be reported to the appropriate authority. Ignoring,
obtaining retroactive consent, or merely documenting without
reporting fails to protect the patient and violates professional
standards.
Question 6
Which of the following describes the correct technique for obtaining a capillary
blood specimen for a glucose test from an adult patient?
A. Puncture the central pad of the fingertip.
B. Puncture the side of the fingertip, avoiding the central pad.
C. Puncture the earlobe for better perfusion.
D. Puncture the heel of the hand.
Correct Answer: B - Puncture the side of the fingertip, avoiding
the central pad.
Page 4
