Examination (2026 Updated Edition)Question
and Verified Answers with Detailed Rationales
in Italics
1. Which chamber of the heart pumps oxygenated blood into
the systemic circulation?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D
Rationale: The left ventricle generates the highest pressure and
pumps oxygenated blood through the aorta to the systemic
circulation.
,2. Which electrolyte abnormality most commonly causes
peaked T waves on ECG?
A. Hypocalcemia
B. Hyperkalemia
C. Hyponatremia
D. Hypokalemia
Answer: B
Rationale: Elevated serum potassium alters cardiac conduction,
producing tall peaked T waves and potentially life-threatening
arrhythmias.
3. Which nursing action has the highest priority when a
patient develops sudden respiratory distress?
A. Notify family
B. Document findings
C. Assess airway, breathing, and circulation
D. Obtain laboratory tests
Answer: C
Rationale: The ABC approach always takes priority during
emergency assessment.
,4. Which microorganism is the most common cause of
catheter-associated urinary tract infection?
A. Staphylococcus aureus
B. Escherichia coli
C. Clostridioides difficile
D. Mycobacterium tuberculosis
Answer: B
Rationale: E. coli remains the leading pathogen responsible for
urinary tract infections.
5. Which insulin has the fastest onset of action?
A. NPH
B. Glargine
C. Lispro
D. Detemir
Answer: C
Rationale: Lispro is a rapid-acting insulin that begins working
within approximately 15 minutes.
, 6. The normal adult respiratory rate is
A. 8–10 breaths/min
B. 12–20 breaths/min
C. 24–30 breaths/min
D. 30–36 breaths/min
Answer: B
Rationale: Healthy adults typically breathe 12–20 times per
minute.
7. Which vitamin deficiency causes scurvy?
A. Vitamin D
B. Vitamin A
C. Vitamin C
D. Vitamin K
Answer: C
Rationale: Vitamin C deficiency impairs collagen synthesis,
resulting in scurvy.