Nursing Fundamentals NCLEX Practice Questions: 20 High-Yield Scenarios with Rationales

Free 20-question nursing fundamentals NCLEX practice set with detailed rationales on burns, DKA, IV potassium, warfarin, COPD, dialysis, insulin, CVC care.

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Nursing Fundamentals NCLEX Practice Questions: 20 High-Yield Scenarios with Rationales

Nursing fundamentals questions test whether you can make safe, priority-based decisions at the bedside, and this free 20-question NCLEX practice set covers every high-yield topic you need to master before exam day. Work through medication safety, fluid resuscitation, diabetes emergencies, oxygen therapy, dialysis complications, postoperative drains, anticoagulants, and central line complications. Every question includes a detailed rationale that explains why the correct answer is right, why each distractor is wrong, and the key clinical concept behind it — so you understand the reasoning, not just the answer. No signup required.

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Work through every question on this page in one continuous NCLEX-style session — with progress tracking, Next / Previous navigation, and the same exam-day interface you'll see on test day.

Question 1: Burns / Fluid Resuscitation

Practice Question

A nurse is caring for an adult client with severe burns involving 40% of the total body surface area. Lactated Ringer’s solution is infusing according to the Parkland formula during the first 24 hours after the burn injury. Which assessment finding is the priority indicator of effective fluid resuscitation?

Question 2: Diabetic Ketoacidosis / IV Insulin

Practice Question

A nurse is caring for a client admitted with diabetic ketoacidosis who is receiving a continuous IV insulin infusion. The client's blood glucose has decreased to 250 mg/dL , but the anion gap remains elevated. Which action should the nurse take first?

Question 3: Post-Mastectomy / JP Drain

Practice Question

A nurse is caring for a client in the early postoperative period after a mastectomy. The client has a Jackson-Pratt drain, and the drainage suddenly changes to a large amount of bright-red blood. Which action should the nurse take first?

Question 4: Warfarin / Elevated INR

Practice Question

A nurse is caring for a client who is receiving warfarin . The morning laboratory results show an INR of 4.5 . Which action should the nurse take first?

Question 5: IV Potassium Chloride

Practice Question

A nurse is caring for a client receiving intravenous potassium chloride through a peripheral IV line. The client reports burning and pain at the IV site. Which action should the nurse take first?

Question 6: Calcium Channel Blocker / Hypotension

Practice Question

A nurse is preparing to administer a prescribed calcium channel blocker to a client with hypertension. The client’s blood pressure is 90/60 mm Hg . Which action should the nurse take first?

Question 7: COPD / Bronchodilator Priority

Practice Question

A nurse is caring for a client with chronic obstructive pulmonary disease who is receiving prescribed oxygen therapy. The client has diffuse wheezing, increased work of breathing, a respiratory rate of 24 breaths/min, and an oxygen saturation of 88%. Which action should the nurse take first?

Question 8: Digoxin / Hypokalemia

Practice Question

A nurse is preparing to administer digoxin to an adult client. The client’s serum potassium level is 2.8 mEq/L . Which action should the nurse take?

Question 9: Post-Dialysis Symptoms

Practice Question

A nurse is caring for a client with end-stage kidney disease who has just returned from hemodialysis. The client reports dizziness, weakness, and nausea. Which action should the nurse take first?

Question 10: Prednisone Teaching

Practice Question

A nurse is providing discharge teaching to a client who has been prescribed oral prednisone for an autoimmune condition. Which instruction should the nurse include?

Question 11: Heart Failure / Diuretic / Hypokalemia

Practice Question

A nurse is preparing to administer a prescribed loop diuretic to a client with chronic heart failure. The client’s serum potassium level is 3.0 mEq/L . Which action should the nurse take first?

Question 12: Warfarin / Bruising

Practice Question

A nurse is caring for a client prescribed warfarin. The client’s INR is 2.8, and the client reports new spontaneous bruising with small hematomas. Which intervention is the nurse’s priority?

Question 13: Laparoscopic Cholecystectomy / Shoulder Pain

Practice Question

A nurse is caring for a client who had a laparoscopic cholecystectomy earlier today. The client reports mild shoulder discomfort and has no signs of acute distress. Which nursing intervention is most appropriate?

Question 14: Heparin / Therapeutic aPTT

Practice Question

A nurse is caring for a client receiving a continuous heparin infusion for deep vein thrombosis. The client's aPTT is 80 seconds, and the facility's therapeutic range is 60 to 80 seconds. Which action should the nurse take?

Question 15: Multiple Sclerosis / Lifestyle Teaching

Practice Question

A nurse is providing teaching to a client who has a new diagnosis of multiple sclerosis. Which lifestyle instruction should the nurse include?

Question 16: Alcohol Withdrawal

Practice Question

A nurse is caring for a client admitted with alcohol withdrawal. The client becomes increasingly agitated and anxious and has visible tremors. Which action should the nurse take first?

Question 17: Chemotherapy / Nausea

Practice Question

A nurse is caring for a client receiving chemotherapy for breast cancer. The client reports nausea and requests medication. Which action should the nurse take first?

Question 18: Hemodialysis / Intradialytic Hypotension

Practice Question

A client with chronic kidney disease is receiving hemodialysis and reports sudden weakness and nausea during the treatment. Which action should the nurse take first?

Question 19: Type 1 Diabetes / Insulin Teaching

Practice Question

A nurse is teaching a client newly diagnosed with type 1 diabetes mellitus about self-administration of insulin. Which instruction is most important for the nurse to include?

Question 20: Central Venous Catheter / Early Complication

Practice Question

A nurse is caring for a client during the first 24 hours after insertion of a central venous catheter. Which complication should the nurse assess for first?


Great job working through these NCLEX-style questions. Review the rationales carefully, especially the priority-thinking patterns:

  • Assess before acting when the client may be unstable.
  • Hold medications when assessment data shows danger.
  • Prioritize airway, breathing, circulation, perfusion, and safety.
  • Watch for medication complications.
  • Know expected vs unexpected postoperative findings.

Key Takeaways From These Nursing Fundamentals NCLEX Questions

  • Nursing fundamentals NCLEX questions often test priority decision-making, not just memorization.
  • Always connect the client’s symptoms to airway, breathing, circulation, perfusion, and safety.
  • For medication questions, know when to hold a drug, check labs, assess vital signs, or notify the provider.
  • High-risk medications like warfarin, heparin, digoxin, insulin, potassium chloride, and antihypertensives require careful safety checks before administration.
  • Fluid balance questions often focus on urine output, blood pressure, heart rate, electrolytes, and signs of dehydration or overload.
  • Postoperative and device-related questions test whether you can recognize expected findings vs warning signs, such as bleeding, infection, pneumothorax, or IV infiltration.
  • The safest NCLEX answer is usually the one that prevents the most immediate harm to the client.

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