2026 UPDATED QUESTIONS DOWNLOAD
WGU D439 Foundations of Nursing Ultimate Master Prep: 350+ Verified OA Practice
Questions & Detailed Rationales | NCLEX-Style (2024-2026 Edition)
This WGU D439 Foundations of Nursing Ultimate Master Pack now features 350 high-yield
questions with detailed rationales. Covering the entire 2024-2026 curriculum, this bank includes
clinical judgment scenarios, ADPIE mastery, vital signs, physical assessment, and NCLEX-style
foundations. This is the most comprehensive study tool available to ensure you pass your D439
Objective Assessment (OA) on the first try.
1. A nurse is caring for a patient who is post-operative day 1. Which assessment finding
is the most reliable early indicator of deteriorating respiratory status?
A) Cyanosis of the nail beds.
B) Increased restlessness and agitation.
C) A respiratory rate of 18 breaths/min.
D) Decreased level of consciousness.
Rationale: Restlessness and apprehension are early signs of hypoxia as the brain reacts to
decreasing oxygen levels. Cyanosis is a late sign.
2. A nurse is preparing to administer an enteral feeding through a nasogastric tube.
What is the priority nursing action?
A) Warm the formula to body temperature.
B) Verify the tube placement via pH testing or X-ray.
C) Aspirate all gastric contents and discard them.
D) Place the patient in a supine position.
Rationale: Verifying placement is the most critical safety step to prevent aspiration of formula
into the lungs.
3. Which of the following is a "Physical" sign of impending death?
A) Increased urine output.
B) Mottling of the hands and feet (livedo reticularis).
C) Consistent, deep, rhythmic breathing.
D) Increased appetite and thirst.
Rationale: Mottling occurs as peripheral circulation fails and blood pools in the extremities.
4. A nurse is assessing a patient’s "Capillary Refill." The nurse knows that a delay of 4
seconds suggests:
A) Normal arterial flow.
B) Impaired peripheral perfusion or dehydration.
, 2026 UPDATED QUESTIONS DOWNLOAD
C) Venous insufficiency.
D) Excessive fluid volume.
Rationale: Normal capillary refill is less than 2-3 seconds. Anything longer indicates poor blood
flow to the tissues.
5. In the "Nursing Process," which step involves the nurse performing the interventions
identified in the care plan?
A) Planning
B) Implementation
C) Evaluation
D) Assessment
Rationale: Implementation is the "action" phase where the nurse carries out the prescribed
nursing care.
6. A nurse is providing care for a patient with a "Clostridium difficile" (C-diff) infection.
Which hand hygiene method is mandatory?
A) Alcohol-based hand sanitizer.
B) Soap and water (mechanical friction).
C) Wearing two pairs of gloves.
D) Using a sterile scrub brush.
Rationale: Alcohol does not kill C-diff spores; mechanical washing with soap and water is
required to rinse the spores off the skin.
7. Which ethical principle is involved when a nurse supports a patient's decision to stop
chemotherapy?
A) Autonomy
B) Beneficence
C) Non-maleficence
D) Fidelity
Rationale: Autonomy refers to the patient’s right to make their own healthcare decisions
without coercion.
8. A nurse is assessing a patient for "Orthostatic Hypotension." The nurse should take
the blood pressure in which sequence?
A) Lying, Sitting, Standing.
B) Standing, Sitting, Lying.
C) Sitting, Lying, Standing.
D) Only while the patient is standing.
Rationale: To detect a drop in pressure, the nurse must establish a baseline while the patient
is at rest (lying) before checking the effect of gravity.
9. What is the standard depth of "Light Palpation" during a physical assessment?
A) 1 cm (0.5 inch).
B) 4 cm (1.5 inches).
, 2026 UPDATED QUESTIONS DOWNLOAD
C) 10 cm (4 inches).
D) Only touching the skin surface.
Rationale: Light palpation is used to assess for tenderness and surface abnormalities without
causing pain or displacing deep organs.
10. A nurse is caring for a patient who is "NPO" for a procedure. The patient asks for a
sip of water. What is the nurse's best response?
A) "I can give you a small glass of ice chips."
B) "You cannot have anything by mouth, but I can provide mouth swabs for comfort."
C) "You can have water as long as you don't swallow it."
D) "I will ask the doctor if you can have clear soda."
Rationale: NPO means nothing by mouth. Mouth swabs provide comfort without violating the
safety requirement for an empty stomach.
11. Which nursing theorist is associated with the "Self-Care Deficit" theory?
A) Jean Watson
B) Dorothea Orem
C) Imogene King
D) Martha Rogers
Rationale: Orem’s theory focuses on the patient’s ability to perform self-care and the nurse's
role in supporting that ability.
12. A nurse is documenting a patient's pulse and notes it is "Bounding." How should
this be graded?
A) 1+
B) 2+
C) 4+
D) 0
Rationale: 0 is absent; 1+ is weak/thready; 2+ is normal; 3+ is full/strong; 4+ is bounding.
13. Which type of "Asepsis" is used when changing a central line dressing?
A) Medical Asepsis
B) Surgical Asepsis
C) Standard Precautions
D) Clean Technique
Rationale: Procedures involving blood vessels or sterile body cavities require sterile (surgical)
asepsis.
14. A nurse finds a patient’s "Radial Pulse" is 115 bpm. Which term correctly describes
this finding?
A) Bradycardia
B) Tachycardia
C) Dysrhythmia
, 2026 UPDATED QUESTIONS DOWNLOAD
D) Eupnea
Rationale: Tachycardia is a heart rate greater than 100 bpm in an adult.
15. What is the most common site for "Healthcare-Associated Infections" (HAIs)?
A) The lungs (Pneumonia).
B) The urinary tract (UTI).
C) Surgical wounds.
D) The bloodstream.
Rationale: Catheter-associated urinary tract infections (CAUTIs) are the most frequent type of
HAI.
16. A nurse is caring for a patient who has "Atrophy" of the right leg. The nurse
recognizes this as:
A) A decrease in muscle size due to disuse.
B) An increase in muscle strength.
C) A buildup of fluid in the joint.
D) A type of skin rash.
Rationale: Muscle atrophy occurs when a limb is immobilized or not used, leading to wasting of
the tissue.
17. When a nurse ensures that a patient's "Living Will" is in the chart, they are acting as
a:
A) Caregiver
B) Patient Advocate
C) Educator
D) Manager
Rationale: Advocacy involves protecting the patient's rights and ensuring their healthcare
wishes are respected.
18. Which "Cranial Nerve" is being tested when a nurse asks a patient to stick out their
tongue?
A) CN IX (Glossopharyngeal)
B) CN X (Vagus)
C) CN XII (Hypoglossal)
D) CN V (Trigeminal)
Rationale: The Hypoglossal nerve (XII) controls the movements of the tongue.
19. A patient is on a "Mechanical Soft Diet." Which of the following is an appropriate
food choice?
A) Fresh apple with skin
B) Ground turkey and mashed potatoes
C) Whole grain toast
D) Celery sticks with peanut butter
WGU D439 Foundations of Nursing Ultimate Master Prep: 350+ Verified OA Practice
Questions & Detailed Rationales | NCLEX-Style (2024-2026 Edition)
This WGU D439 Foundations of Nursing Ultimate Master Pack now features 350 high-yield
questions with detailed rationales. Covering the entire 2024-2026 curriculum, this bank includes
clinical judgment scenarios, ADPIE mastery, vital signs, physical assessment, and NCLEX-style
foundations. This is the most comprehensive study tool available to ensure you pass your D439
Objective Assessment (OA) on the first try.
1. A nurse is caring for a patient who is post-operative day 1. Which assessment finding
is the most reliable early indicator of deteriorating respiratory status?
A) Cyanosis of the nail beds.
B) Increased restlessness and agitation.
C) A respiratory rate of 18 breaths/min.
D) Decreased level of consciousness.
Rationale: Restlessness and apprehension are early signs of hypoxia as the brain reacts to
decreasing oxygen levels. Cyanosis is a late sign.
2. A nurse is preparing to administer an enteral feeding through a nasogastric tube.
What is the priority nursing action?
A) Warm the formula to body temperature.
B) Verify the tube placement via pH testing or X-ray.
C) Aspirate all gastric contents and discard them.
D) Place the patient in a supine position.
Rationale: Verifying placement is the most critical safety step to prevent aspiration of formula
into the lungs.
3. Which of the following is a "Physical" sign of impending death?
A) Increased urine output.
B) Mottling of the hands and feet (livedo reticularis).
C) Consistent, deep, rhythmic breathing.
D) Increased appetite and thirst.
Rationale: Mottling occurs as peripheral circulation fails and blood pools in the extremities.
4. A nurse is assessing a patient’s "Capillary Refill." The nurse knows that a delay of 4
seconds suggests:
A) Normal arterial flow.
B) Impaired peripheral perfusion or dehydration.
, 2026 UPDATED QUESTIONS DOWNLOAD
C) Venous insufficiency.
D) Excessive fluid volume.
Rationale: Normal capillary refill is less than 2-3 seconds. Anything longer indicates poor blood
flow to the tissues.
5. In the "Nursing Process," which step involves the nurse performing the interventions
identified in the care plan?
A) Planning
B) Implementation
C) Evaluation
D) Assessment
Rationale: Implementation is the "action" phase where the nurse carries out the prescribed
nursing care.
6. A nurse is providing care for a patient with a "Clostridium difficile" (C-diff) infection.
Which hand hygiene method is mandatory?
A) Alcohol-based hand sanitizer.
B) Soap and water (mechanical friction).
C) Wearing two pairs of gloves.
D) Using a sterile scrub brush.
Rationale: Alcohol does not kill C-diff spores; mechanical washing with soap and water is
required to rinse the spores off the skin.
7. Which ethical principle is involved when a nurse supports a patient's decision to stop
chemotherapy?
A) Autonomy
B) Beneficence
C) Non-maleficence
D) Fidelity
Rationale: Autonomy refers to the patient’s right to make their own healthcare decisions
without coercion.
8. A nurse is assessing a patient for "Orthostatic Hypotension." The nurse should take
the blood pressure in which sequence?
A) Lying, Sitting, Standing.
B) Standing, Sitting, Lying.
C) Sitting, Lying, Standing.
D) Only while the patient is standing.
Rationale: To detect a drop in pressure, the nurse must establish a baseline while the patient
is at rest (lying) before checking the effect of gravity.
9. What is the standard depth of "Light Palpation" during a physical assessment?
A) 1 cm (0.5 inch).
B) 4 cm (1.5 inches).
, 2026 UPDATED QUESTIONS DOWNLOAD
C) 10 cm (4 inches).
D) Only touching the skin surface.
Rationale: Light palpation is used to assess for tenderness and surface abnormalities without
causing pain or displacing deep organs.
10. A nurse is caring for a patient who is "NPO" for a procedure. The patient asks for a
sip of water. What is the nurse's best response?
A) "I can give you a small glass of ice chips."
B) "You cannot have anything by mouth, but I can provide mouth swabs for comfort."
C) "You can have water as long as you don't swallow it."
D) "I will ask the doctor if you can have clear soda."
Rationale: NPO means nothing by mouth. Mouth swabs provide comfort without violating the
safety requirement for an empty stomach.
11. Which nursing theorist is associated with the "Self-Care Deficit" theory?
A) Jean Watson
B) Dorothea Orem
C) Imogene King
D) Martha Rogers
Rationale: Orem’s theory focuses on the patient’s ability to perform self-care and the nurse's
role in supporting that ability.
12. A nurse is documenting a patient's pulse and notes it is "Bounding." How should
this be graded?
A) 1+
B) 2+
C) 4+
D) 0
Rationale: 0 is absent; 1+ is weak/thready; 2+ is normal; 3+ is full/strong; 4+ is bounding.
13. Which type of "Asepsis" is used when changing a central line dressing?
A) Medical Asepsis
B) Surgical Asepsis
C) Standard Precautions
D) Clean Technique
Rationale: Procedures involving blood vessels or sterile body cavities require sterile (surgical)
asepsis.
14. A nurse finds a patient’s "Radial Pulse" is 115 bpm. Which term correctly describes
this finding?
A) Bradycardia
B) Tachycardia
C) Dysrhythmia
, 2026 UPDATED QUESTIONS DOWNLOAD
D) Eupnea
Rationale: Tachycardia is a heart rate greater than 100 bpm in an adult.
15. What is the most common site for "Healthcare-Associated Infections" (HAIs)?
A) The lungs (Pneumonia).
B) The urinary tract (UTI).
C) Surgical wounds.
D) The bloodstream.
Rationale: Catheter-associated urinary tract infections (CAUTIs) are the most frequent type of
HAI.
16. A nurse is caring for a patient who has "Atrophy" of the right leg. The nurse
recognizes this as:
A) A decrease in muscle size due to disuse.
B) An increase in muscle strength.
C) A buildup of fluid in the joint.
D) A type of skin rash.
Rationale: Muscle atrophy occurs when a limb is immobilized or not used, leading to wasting of
the tissue.
17. When a nurse ensures that a patient's "Living Will" is in the chart, they are acting as
a:
A) Caregiver
B) Patient Advocate
C) Educator
D) Manager
Rationale: Advocacy involves protecting the patient's rights and ensuring their healthcare
wishes are respected.
18. Which "Cranial Nerve" is being tested when a nurse asks a patient to stick out their
tongue?
A) CN IX (Glossopharyngeal)
B) CN X (Vagus)
C) CN XII (Hypoglossal)
D) CN V (Trigeminal)
Rationale: The Hypoglossal nerve (XII) controls the movements of the tongue.
19. A patient is on a "Mechanical Soft Diet." Which of the following is an appropriate
food choice?
A) Fresh apple with skin
B) Ground turkey and mashed potatoes
C) Whole grain toast
D) Celery sticks with peanut butter
