WGU D120 OBJECTIVE ASSESSMENT (OA) EXAM ACTUAL 2026/2027 ACCURATE TEST COMPLETE APPROVED QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (100% CORRECT VERIFIED ANSWERS) NEWEST UPDATED VERSION 2026B EDITION |ALREADY GRADED A+ (BRAND NEW!) |F

WGU D120 OBJECTIVE ASSESSMENT (OA) EXAM ACTUAL 2026/2027
ACCURATE TEST COMPLETE APPROVED QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES (100%
CORRECT VERIFIED ANSWERS) NEWEST UPDATED VERSION 2026B
EDITION |ALREADY GRADED A+ (BRAND NEW!) |FULL REVISED
D120 WGU OBJECTIVE ASSESSMENT


Question 1
A patient with chronic kidney disease has a glomerular filtration rate (GFR) of 25
mL/min. Which acid-base imbalance is most expected?
A) Metabolic alkalosis
B) Respiratory acidosis
C) Metabolic acidosis (CORRECT ANSWER) – Rationale: Reduced GFR impairs
renal excretion of hydrogen ions and reabsorption of bicarbonate, leading to
metabolic acidosis.
D) Respiratory alkalosis


Question 2
Which laboratory finding is consistent with a diagnosis of syndrome of
inappropriate antidiuretic hormone (SIADH)?
A) Serum sodium 155 mEq/L
B) Serum sodium 120 mEq/L (CORRECT ANSWER) – Rationale: SIADH causes
water retention, resulting in dilutional hyponatremia (low serum sodium).
C) Serum osmolality 310 mOsm/kg
D) Urine specific gravity 1.001


Question 3

,A nurse reviews a patient’s arterial blood gas (ABG): pH 7.30, PaCO2 55 mm Hg,
HCO3- 24 mEq/L. Which condition do these values indicate?
A) Uncompensated metabolic acidosis
B) Uncompensated respiratory acidosis (CORRECT ANSWER) – Rationale: Low
pH (acidosis), elevated PaCO2 (respiratory cause), normal HCO3- (no renal
compensation yet).
C) Compensated metabolic alkalosis
D) Partially compensated respiratory alkalosis


Question 4
Which electrolyte imbalance is a priority to treat first in a patient with acute kidney
injury?
A) Hypomagnesemia
B) Hypophosphatemia
C) Hyperkalemia (CORRECT ANSWER) – Rationale: Hyperkalemia can cause
fatal cardiac dysrhythmias; it requires immediate intervention in acute kidney
injury.
D) Hypocalcemia


Question 5
A patient taking furosemide reports muscle weakness and cramping. Which
potassium level would confirm the suspected imbalance?
A) 5.2 mEq/L
B) 2.9 mEq/L (CORRECT ANSWER) – Rationale: Loop diuretics cause
hypokalemia (<3.5 mEq/L), leading to neuromuscular symptoms like weakness
and cramping.
C) 4.1 mEq/L
D) 6.0 mEq/L

,Question 6
Which intravenous fluid is most appropriate for a patient with diabetic ketoacidosis
and a serum sodium of 128 mEq/L?
A) 3% saline
B) 0.9% normal saline (CORRECT ANSWER) – Rationale: Isotonic saline
restores volume and corrects hyperglycemia gradually; hypertonic saline is not
indicated for mild/moderate hyponatremia in DKA.
C) 0.45% saline
D) Dextrose 5% in water


Question 7
A patient’s ABG shows: pH 7.48, PaCO2 30 mm Hg, HCO3- 22 mEq/L. Which
interpretation is correct?
A) Metabolic acidosis, uncompensated
B) Respiratory alkalosis, uncompensated (CORRECT ANSWER) – Rationale:
Alkalotic pH, low PaCO2 (respiratory cause), normal HCO3- (no metabolic
compensation yet).
C) Metabolic alkalosis, partially compensated
D) Respiratory acidosis, fully compensated


Question 8
Which assessment finding is a late sign of hypovolemic shock?
A) Thready pulse
B) Hypotension (CORRECT ANSWER) – Rationale: Hypotension is a late finding
in hypovolemic shock due to compensatory mechanisms failing; tachycardia and
thready pulse occur earlier.
C) Cool extremities

, D) Decreased urine output


Question 9
A patient with heart failure has a potassium level of 5.8 mEq/L. Which medication
should the nurse question?
A) Furosemide
B) Spironolactone (CORRECT ANSWER) – Rationale: Spironolactone is
potassium-sparing; giving it with hyperkalemia increases risk of cardiac arrest.
C) Metoprolol
D) Lisinopril


Question 10
In a patient with burns over 40% total body surface area, which fluid shift occurs
during the first 24 hours?
A) Fluid moves from intravascular to interstitial space (CORRECT ANSWER) –
Rationale: Capillary leak syndrome causes loss of plasma proteins and fluid into
interstitium, leading to hypovolemia and edema.
B) Fluid moves from interstitial to intracellular space
C) Fluid moves from interstitial to intravascular space
D) No fluid shift occurs


Question 11
Which ABG result indicates fully compensated metabolic alkalosis?
A) pH 7.35, PaCO2 48 mm Hg, HCO3- 30 mEq/L
B) pH 7.45, PaCO2 48 mm Hg, HCO3- 32 mEq/L
C) pH 7.40, PaCO2 50 mm Hg, HCO3- 31 mEq/L (CORRECT ANSWER) –
Rationale: Normal pH (compensated), elevated HCO3- (metabolic alkalosis),
elevated PaCO2 (respiratory compensation via hypoventilation).