Florida NCLEX Exam Diagnostic Tests and Laboratory Values
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1. A nurse reviews a client's laboratory results. Which serum potassium value requires immediate
intervention?
A. 3.8 mEq/L
B. 4.2 mEq/L
C. 5.0 mEq/L
D. 6.5 mEq/L
Answer: D. 6.5 mEq/L
Rationale: A potassium level of 6.5 mEq/L indicates severe hyperkalemia, which can cause life-
threatening cardiac dysrhythmias such as ventricular fibrillation or asystole. Immediate
intervention is necessary to stabilize the cardiac membrane and reduce serum potassium.
Normal potassium levels range from 3.5 to 5.0 mEq/L.
2. Which hemoglobin level is considered normal for an adult female?
A. 12–16 g/dL
B. 8–10 g/dL
C. 17–20 g/dL
D. 21–24 g/dL
Answer: A. 12–16 g/dL
Rationale: The normal hemoglobin range for adult females is approximately 12–16 g/dL. Values
below normal suggest anemia, while significantly elevated levels may indicate dehydration or
polycythemia.
3. Which laboratory value is the best indicator of long-term blood glucose control?
,A. Random blood glucose
B. Fasting blood glucose
C. Oral glucose tolerance test
D. Hemoglobin A1C
Answer: D. Hemoglobin A1C
Rationale: Hemoglobin A1C reflects the average blood glucose level over the previous two to
three months by measuring glucose attached to red blood cells. It is the preferred test for
evaluating long-term diabetes management.
4. Before administering intravenous contrast for a CT scan, the nurse should primarily review
which laboratory value?
A. Hemoglobin
B. Platelet count
C. Serum creatinine
D. White blood cell count
Answer: C. Serum creatinine
Rationale: Serum creatinine evaluates kidney function. Since contrast dye is nephrotoxic,
impaired renal function increases the risk of contrast-induced kidney injury. Elevated creatinine
levels may require delaying or modifying the procedure.
5. A client has a platelet count of 40,000/mm³. Which nursing intervention is the priority?
A. Encourage vigorous exercise.
B. Administer intramuscular injections.
C. Implement bleeding precautions.
D. Restrict fluid intake.
Answer: C. Implement bleeding precautions.
Rationale: A platelet count below 50,000/mm³ significantly increases the risk of spontaneous
bleeding. The nurse should avoid invasive procedures, use soft toothbrushes, minimize trauma,
and monitor closely for signs of hemorrhage.
6. Which laboratory value indicates normal kidney function?
, A. Creatinine 3.0 mg/dL
B. BUN 45 mg/dL
C. Creatinine 1.0 mg/dL
D. BUN 50 mg/dL
Answer: C. Creatinine 1.0 mg/dL
Rationale: Normal serum creatinine generally ranges from 0.6 to 1.3 mg/dL. Elevated creatinine
and BUN values suggest impaired kidney function or dehydration.
7. Which blood glucose level defines hypoglycemia?
A. 140 mg/dL
B. 110 mg/dL
C. 90 mg/dL
D. 60 mg/dL
Answer: D. 60 mg/dL
Rationale: Blood glucose levels below 70 mg/dL are considered hypoglycemic. A value of 60
mg/dL requires prompt treatment with fast-acting carbohydrates if the client is conscious.
8. A prolonged PT/INR result indicates that the client is at increased risk for:
A. Infection
B. Dehydration
C. Bleeding
D. Hypertension
Answer: C. Bleeding
Rationale: PT and INR measure the extrinsic clotting pathway and monitor warfarin therapy.
Prolonged values indicate delayed blood clotting and increased bleeding risk.
9. Which electrolyte is the primary extracellular cation?
A. Potassium
B. Calcium
C. Magnesium
D. Sodium
Updated Exam 2026 WITH Recent Newest Verified And Well
Analyzed Exam Questions (Actual Exam 2026-2027) Correct
Detailed & Verified ANSWERS (100% Accurate Solutions)
ALREADY GRADED A+||NEWEST VERSION Of The Exam
Guarantee Pass!!
1. A nurse reviews a client's laboratory results. Which serum potassium value requires immediate
intervention?
A. 3.8 mEq/L
B. 4.2 mEq/L
C. 5.0 mEq/L
D. 6.5 mEq/L
Answer: D. 6.5 mEq/L
Rationale: A potassium level of 6.5 mEq/L indicates severe hyperkalemia, which can cause life-
threatening cardiac dysrhythmias such as ventricular fibrillation or asystole. Immediate
intervention is necessary to stabilize the cardiac membrane and reduce serum potassium.
Normal potassium levels range from 3.5 to 5.0 mEq/L.
2. Which hemoglobin level is considered normal for an adult female?
A. 12–16 g/dL
B. 8–10 g/dL
C. 17–20 g/dL
D. 21–24 g/dL
Answer: A. 12–16 g/dL
Rationale: The normal hemoglobin range for adult females is approximately 12–16 g/dL. Values
below normal suggest anemia, while significantly elevated levels may indicate dehydration or
polycythemia.
3. Which laboratory value is the best indicator of long-term blood glucose control?
,A. Random blood glucose
B. Fasting blood glucose
C. Oral glucose tolerance test
D. Hemoglobin A1C
Answer: D. Hemoglobin A1C
Rationale: Hemoglobin A1C reflects the average blood glucose level over the previous two to
three months by measuring glucose attached to red blood cells. It is the preferred test for
evaluating long-term diabetes management.
4. Before administering intravenous contrast for a CT scan, the nurse should primarily review
which laboratory value?
A. Hemoglobin
B. Platelet count
C. Serum creatinine
D. White blood cell count
Answer: C. Serum creatinine
Rationale: Serum creatinine evaluates kidney function. Since contrast dye is nephrotoxic,
impaired renal function increases the risk of contrast-induced kidney injury. Elevated creatinine
levels may require delaying or modifying the procedure.
5. A client has a platelet count of 40,000/mm³. Which nursing intervention is the priority?
A. Encourage vigorous exercise.
B. Administer intramuscular injections.
C. Implement bleeding precautions.
D. Restrict fluid intake.
Answer: C. Implement bleeding precautions.
Rationale: A platelet count below 50,000/mm³ significantly increases the risk of spontaneous
bleeding. The nurse should avoid invasive procedures, use soft toothbrushes, minimize trauma,
and monitor closely for signs of hemorrhage.
6. Which laboratory value indicates normal kidney function?
, A. Creatinine 3.0 mg/dL
B. BUN 45 mg/dL
C. Creatinine 1.0 mg/dL
D. BUN 50 mg/dL
Answer: C. Creatinine 1.0 mg/dL
Rationale: Normal serum creatinine generally ranges from 0.6 to 1.3 mg/dL. Elevated creatinine
and BUN values suggest impaired kidney function or dehydration.
7. Which blood glucose level defines hypoglycemia?
A. 140 mg/dL
B. 110 mg/dL
C. 90 mg/dL
D. 60 mg/dL
Answer: D. 60 mg/dL
Rationale: Blood glucose levels below 70 mg/dL are considered hypoglycemic. A value of 60
mg/dL requires prompt treatment with fast-acting carbohydrates if the client is conscious.
8. A prolonged PT/INR result indicates that the client is at increased risk for:
A. Infection
B. Dehydration
C. Bleeding
D. Hypertension
Answer: C. Bleeding
Rationale: PT and INR measure the extrinsic clotting pathway and monitor warfarin therapy.
Prolonged values indicate delayed blood clotting and increased bleeding risk.
9. Which electrolyte is the primary extracellular cation?
A. Potassium
B. Calcium
C. Magnesium
D. Sodium
