Complete Exam Guide Subject-wise practice platform
0 XP
Emergency and Critical Care Nursing

Rule of Nines and Burn Surface Estimation Practice Questions

20 free Rule of Nines and Burn Surface Estimation practice questions for the NCLEX Exam. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.

Practice in Quiz Mode

Question 1 of 20 Easy

According to the Rule of Nines, what percentage of total body surface area (TBSA) does each leg represent in an adult?

  1. A a. 9%
  2. B b. 14%
  3. C c. 18%
  4. D d. 36%

Correct answer: c. 18%

Each leg represents 18% of TBSA (9% for the anterior surface and 9% for the posterior surface).

Question 2 of 20 Easy

In the Rule of Nines, the anterior trunk accounts for what percentage of TBSA in an adult?

  1. A a. 9%
  2. B b. 18%
  3. C c. 27%
  4. D d. 36%

Correct answer: b. 18%

The anterior trunk (chest and abdomen) makes up 18% of the total body surface area.

Question 3 of 20 Easy

What percentage of TBSA does the head and neck represent in an adult according to the Rule of Nines?

  1. A a. 4.5%
  2. B b. 7%
  3. C c. 9%
  4. D d. 10%

Correct answer: c. 9%

The head and neck collectively account for 9% of the body’s surface area.

Question 4 of 20 Medium

The posterior trunk in the Rule of Nines represents:

  1. A a. 9%
  2. B b. 12%
  3. C c. 18%
  4. D d. 27%

Correct answer: c. 18%

The posterior trunk (back and buttocks) equals 18% of the TBSA.

Question 5 of 20 Medium

In an adult patient, both arms (anterior and posterior) together account for:

  1. A a. 9%
  2. B b. 14%
  3. C c. 18%
  4. D d. 22%

Correct answer: c. 18%

Each arm is 9% of TBSA (4.5% front and 4.5% back), totaling 18% for both arms.

Question 6 of 20 Easy

The perineum represents what percent of TBSA?

  1. A a. 0%
  2. B b. 1%
  3. C c. 2%
  4. D d. 5%

Correct answer: b. 1%

The perineal area contributes 1% of TBSA in the Rule of Nines.

Question 7 of 20 Medium

A patient with burns over the entire left arm and anterior trunk has what estimated TBSA burned?

  1. A a. 18%
  2. B b. 22.5%
  3. C c. 27%
  4. D d. 30%

Correct answer: c. 27%

Left arm = 9%, anterior trunk = 18%, totaling 27% TBSA.

Question 8 of 20 Easy

What is the primary purpose of calculating TBSA in burn injuries?

  1. A To determine the optimal timing for surgical care
  2. B To estimate the patient's overall level of pain
  3. C To estimate the patient's risk of wound infection
  4. D To guide fluid resuscitation and burn management

Correct answer: To guide fluid resuscitation and burn management

Total body surface area is the input to fluid resuscitation formulas such as Parkland, which gives 4 mL of lactated Ringer's per kilogram per percent TBSA in the first 24 hours, with half delivered in the first 8 hours from the time of injury. TBSA also drives transfer criteria to a burn centre; infection risk, surgical timing and analgesia are managed from the depth and site of the burn rather than from TBSA alone.

Question 9 of 20 Medium

The Rule of Nines is less accurate in which population?

  1. A a. Adults
  2. B b. Adolescents
  3. C c. Children
  4. D d. Tall individuals

Correct answer: c. Children

Because children’s body proportions differ (larger head, smaller limbs), the Rule of Nines overestimates or underestimates certain regions.

Question 10 of 20 Medium

Which alternative method is preferred for estimating burn size in children?

  1. A a. Parkland formula
  2. B b. Wallace formula
  3. C c. Lund and Browder chart
  4. D d. Baxter ratio

Correct answer: c. Lund and Browder chart

The Lund and Browder chart adjusts percentages for age and body proportion, offering more accuracy in children.

Question 11 of 20 Medium

A patient has burns to the entire right arm (9%) and the anterior right leg (9%). What is the total TBSA?

  1. A a. 9%
  2. B b. 12%
  3. C c. 18%
  4. D d. 27%

Correct answer: c. 18%

Right arm = 9%, anterior right leg = 9%; total burn area = 18%.

Question 12 of 20 Medium

Which of the following would represent a major burn requiring specialized care?

  1. A a. 5% TBSA full-thickness
  2. B b. 10% TBSA superficial partial-thickness
  3. C c. 25% TBSA partial-thickness
  4. D d. 8% TBSA superficial

Correct answer: c. 25% TBSA partial-thickness

Partial-thickness burns covering ≥25% TBSA in adults are considered major and need burn center management.

Question 13 of 20 Medium

A patient has burns on both anterior legs and the anterior trunk. Estimate TBSA burned.

  1. A a. 18%
  2. B b. 27%
  3. C c. 36%
  4. D d. 45%

Correct answer: c. 36%

Each anterior leg = 9% (total 18%) + anterior trunk = 18%; total = 36% TBSA.

Question 14 of 20 Medium

Which statement about the Rule of Nines is correct?

  1. A It measures the depth of the burn injury.
  2. B It estimates the total body surface area burned.
  3. C It applies only to full-thickness burn injuries.
  4. D It is accurate only for burns of the face.

Correct answer: It estimates the total body surface area burned.

The Rule of Nines provides a quick estimate of TBSA burned, not burn depth.

Question 15 of 20 Medium

A patient’s burns involve the entire head, neck, and both anterior arms. Calculate TBSA.

  1. A a. 9%
  2. B b. 18%
  3. C c. 27%
  4. D d. 36%

Correct answer: b. 18%

Head and neck together = 9%. Each anterior arm = 4.5%, so both anterior arms = 9%. Total = 9% + 9% = 18% TBSA.

Question 16 of 20 Medium

In adults, the posterior surface of one leg represents approximately:

  1. A a. 4.5%
  2. B b. 9%
  3. C c. 12%
  4. D d. 18%

Correct answer: b. 9%

Each leg accounts for 18% total (9% anterior, 9% posterior). The posterior leg alone is 9%.

Question 17 of 20 Medium

Which burn pattern would most likely result from lying on a hot surface for a prolonged time?

  1. A a. Superficial partial-thickness over 9% TBSA
  2. B b. Posterior trunk full-thickness burn (18%)
  3. C c. Anterior arm superficial burn
  4. D d. Isolated perineal burn

Correct answer: b. Posterior trunk full-thickness burn (18%)

Contact burns to the back from a hot surface can cause full-thickness damage over the posterior trunk, which equals 18% TBSA.

Question 18 of 20 Medium

A patient has burns on the anterior face, neck, and anterior chest. What is the estimated TBSA?

  1. A a. 9%
  2. B b. 13.5%
  3. C c. 18%
  4. D d. 22.5%

Correct answer: b. 13.5%

Head/neck (9%) anterior half = 4.5%, plus anterior chest (9%) = total 13.5%.

Question 19 of 20 Easy

The nurse uses the palmar method when:

  1. A a. Burns are small or scattered
  2. B b. Patient has >50% TBSA
  3. C c. Only deep burns are present
  4. D d. Calculating pediatric burns

Correct answer: a. Burns are small or scattered

The palmar method uses the patient’s palm (≈1% TBSA) for estimating small or irregular burn areas.

Question 20 of 20 Hard

A patient has burns on the entire anterior and posterior trunk and both legs. Estimate total TBSA.

  1. A a. 36%
  2. B b. 45%
  3. C c. 54%
  4. D d. 72%

Correct answer: d. 72%

Anterior + posterior trunk = 36%, and both legs (18% each) = 36%; total = 72% TBSA, a life-threatening extent of burns.

0 / 20 answered