NMC CBT Nurse Exam Questions & Answers 2026 (11–20)

✓ Correct answer: C. 100 mg

Multiplying the child's weight by the prescribed dose: 20 kg × 5 mg/kg = 100 mg. Why the other options are incorrect: • 50 mg: 50 mg would represent only 2.5 mg/kg, which is half the required dose. • 75 mg: 75 mg corresponds to 3.75 mg/kg, falling short of the prescribed amount. • 125 mg: 125 mg equates to 6.25 mg/kg, exceeding the prescribed dose. • 150 mg: 150 mg equals 7.5 mg/kg, which is well above what was prescribed.

✓ Correct answer: C. 100 mg

25 kg × 4 mg/kg = 100 mg is the correct total. Why the other options are incorrect: • 80 mg: 80 mg corresponds to 3.2 mg/kg, below the prescribed dose. • 90 mg: 90 mg gives 3.6 mg/kg, still insufficient. • 110 mg: 110 mg equates to 4.4 mg/kg, slightly over the prescribed amount. • 120 mg: 120 mg represents 4.8 mg/kg, exceeding the intended dose.

✓ Correct answer: B. 2 ml

500 mg ÷ 250 mg/ml = 2 ml, which supplies the full prescribed dose. Why the other options are incorrect: • 1 ml: 1 ml provides 250 mg — only half the 500 mg that is required. • 3 ml: 3 ml would deliver 750 mg, exceeding the prescription by 250 mg. • 4 ml: 4 ml contains 1000 mg — double what was prescribed. • 5 ml: 5 ml gives 1250 mg, which is more than twice the required dose.

✓ Correct answer: B. 10 ml

Since 5 ml contains 50 mg, doubling both gives 10 ml for a 100 mg dose. Why the other options are incorrect: • 5 ml: 5 ml delivers only 50 mg, which is half of the required dose. • 15 ml: 15 ml would deliver 150 mg, exceeding the required amount. • 20 ml: 20 ml equates to 200 mg, twice the prescribed dose. • 25 ml: 25 ml equates to 250 mg, far more than what is needed.

✓ Correct answer: B. 2 ml

At 300 mg per ml, 2 ml provides the prescribed 600 mg. Why the other options are incorrect: • 1 ml: 1 ml delivers only 300 mg, half the required dose. • 3 ml: 3 ml delivers 900 mg, exceeding the prescribed dose by half. • 4 ml: 4 ml delivers 1200 mg, twice the dose prescribed. • 5 ml: 5 ml delivers 1500 mg, far in excess of the prescribed amount.

✓ Correct answer: C. 120 ml/hr

1500 ml divided by 12 hours equals 125 ml/hr. Why the other options are incorrect: • 100 ml/hr: 100 ml/hr would infuse only 1200 ml over 12 hours, leaving a 300 ml deficit. • 110 ml/hr: 110 ml/hr totals 1320 ml — still 180 ml below the prescribed volume. • 125 ml/hr: 130 ml/hr delivers 1560 ml, slightly more than was ordered. • 130 ml/hr: 140 ml/hr totals 1680 ml, substantially above the prescribed dose.

✓ Correct answer: D. 72 mg

12 kg × 6 mg/kg = 72 mg is the correct total dose. Why the other options are incorrect: • 60 mg: 60 mg equates to 5 mg/kg, below the required dose. • 66 mg: 66 mg equates to 5.5 mg/kg, under the target. • 70 mg: 70 mg equates to approximately 5.8 mg/kg, just short of the required amount. • 80 mg: 80 mg equates to approximately 6.7 mg/kg, which exceeds the prescribed dose.

✓ Correct answer: C. 660 mg

55 kg × 12 mg/kg = 660 mg is the correct total dose. Why the other options are incorrect: • 600 mg: 600 mg equates to approximately 10.9 mg/kg, below the prescribed dose. • 650 mg: 650 mg equates to approximately 11.8 mg/kg, slightly under the target. • 700 mg: 700 mg equates to approximately 12.7 mg/kg, above the prescribed dose. • 720 mg: 720 mg equates to approximately 13.1 mg/kg, which is too high.

✓ Correct answer: B. 10 ml

Each 5 ml delivers 75 mg, so 10 ml delivers the required 150 mg. Why the other options are incorrect: • 5 ml: 5 ml provides only 75 mg, half the prescribed dose. • 15 ml: 15 ml provides 225 mg, which is 75 mg over the required amount. • 20 ml: 20 ml provides 300 mg, twice the prescribed dose. • 25 ml: 25 ml provides 375 mg, far in excess of what was prescribed.

✓ Correct answer: C. 550 ml

Adding both volumes: 400 ml + 150 ml gives a total intake of 550 ml. Why the other options are incorrect: • 500 ml: 500 ml is incorrect; it underestimates by 50 ml. • 525 ml: 525 ml falls 25 ml short of the correct total. • 575 ml: 575 ml overstates the total by 25 ml. • 600 ml: 600 ml exceeds the correct figure by 50 ml.