TheoryFree NMC CBT Nurse Practice Test
Take a free NMC CBT Nurse practice test for 2026 with questions, answers, explanations, PDF download and timed mock exam links.
NMC CBT Nurse Questions
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Q1The prescriber orders 2000 ml of IV fluid to be infused over 16 hours. What hourly rate should be programmed?
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✓ Correct answer: 125 ml/hr
Dividing 2000 ml by 16 hours gives a rate of 125 ml/hr. Why the other options are incorrect: • 110 ml/hr: 110 ml/hr would infuse only 1760 ml in 16 hours, 240 ml short of the target. • 120 ml/hr: 120 ml/hr delivers 1920 ml — still 80 ml below the prescribed volume. • 130 ml/hr: 130 ml/hr totals 2080 ml, slightly above the prescribed dose. • 140 ml/hr: 140 ml/hr gives 2240 ml, well above what was ordered.
Q2What volume in millilitres is equal to 3.5 litres?
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✓ Correct answer: 3500 ml
Applying the factor of 1000 ml per litre: 3.5 × 1000 = 3500 ml. Why the other options are incorrect: • 2500 ml: 2500 ml corresponds to 2.5 litres, not 3.5 litres. • 3000 ml: 3000 ml equals 3 litres, falling short of 3.5 litres. • 3250 ml: 3250 ml equates to 3.25 litres, slightly under the required 3.5 litres. • 4000 ml: 4000 ml equals 4 litres, which overshoots 3.5 litres.
Q3A physician orders 2000 ml of fluid to be given over a 20-hour period. What flow rate, in ml per hour, is required?
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✓ Correct answer: 100 ml/hr
2000 ml divided by 20 hours equals a flow rate of 100 ml/hr. Why the other options are incorrect: • 90 ml/hr: Running at 90 ml/hr would yield only 1800 ml over 20 hours, falling 200 ml short of the order. • 95 ml/hr: At 95 ml/hr, the total infused would be 1900 ml, still 100 ml below the prescribed volume. • 105 ml/hr: A rate of 105 ml/hr would deliver 2100 ml, which exceeds the prescribed amount. • 110 ml/hr: At 110 ml/hr, the patient would receive 2200 ml, significantly above what was ordered.
Q4An IV prescription calls for 400 ml to be given over 4 hours. What should the hourly infusion rate be?
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✓ Correct answer: 100 ml/hr
400 ml divided by 4 hours equals 100 ml/hr. Why the other options are incorrect: • 80 ml/hr: At 80 ml/hr, only 320 ml would be infused over 4 hours, well below the prescribed volume. • 90 ml/hr: A rate of 90 ml/hr would deliver 360 ml in 4 hours, short of the required 400 ml. • 110 ml/hr: At 110 ml/hr, the total delivered would be 440 ml, slightly over the ordered amount. • 120 ml/hr: A rate of 120 ml/hr would infuse 480 ml over 4 hours, significantly exceeding the prescription.
Q5A syrup has a concentration of 20 mg in every 5 ml. What volume must be given to deliver a 40 mg dose?
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✓ Correct answer: 10 ml
Since 5 ml carries 20 mg, doubling both quantities gives 10 ml for 40 mg. Why the other options are incorrect: • 5 ml: 5 ml delivers only 20 mg, half of the 40 mg required. • 15 ml: 15 ml would deliver 60 mg, exceeding the prescribed dose. • 20 ml: 20 ml would deliver 80 mg, double the dose needed. • 25 ml: 25 ml would deliver 100 mg, more than twice the required amount.
Q6Recorded outputs for a patient are: 400 ml urine, 250 ml from a drain, and 100 ml of vomit. What is the total fluid output?
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✓ Correct answer: 750 ml
All outputs summed: 400 + 250 + 100 = 750 ml total output. Why the other options are incorrect: • 700 ml: 700 ml is 50 ml less than the correct total. • 725 ml: 725 ml falls 25 ml short of the correct figure. • 775 ml: 775 ml adds an extra 25 ml that is not accounted for. • 800 ml: 800 ml overstates the correct output by 50 ml.
Q7A dose of 250 mg is required and each tablet contains 125 mg. How many tablets must be given?
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✓ Correct answer: 2 tablets
Two 125 mg tablets add up to exactly the required 250 mg dose. Why the other options are incorrect: • 1 tablet: A single tablet delivers only 125 mg, half of the required dose. • 3 tablets: Three tablets yield 375 mg, which is above the prescribed amount. • 4 tablets: Four tablets provide 500 mg, twice the dose required. • 5 tablets: Five tablets total 625 mg, substantially more than needed.
Q8A patient is prescribed 1.2 g of a drug. Each vial holds 600 mg. How many vials are necessary to give the full dose?
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✓ Correct answer: 2 vials
1.2 g equals 1200 mg. Two vials at 600 mg each combine to give exactly 1200 mg. Why the other options are incorrect: • 1 vial: One vial provides only 600 mg, which is half the 1.2 g required. • 3 vials: Three vials provide 1800 mg, significantly more than prescribed. • 4 vials: Four vials provide 2400 mg, double the prescribed dose. • 5 vials: Five vials provide 3000 mg, which would be dangerously excessive.
Q9A patient received 400 ml via IV infusion, drank 100 ml of tea, and consumed 200 ml of water. What is the total fluid intake?
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✓ Correct answer: 700 ml
Total intake: 400 + 100 + 200 = 700 ml. Why the other options are incorrect: • 650 ml: 650 ml is incorrect — this is 50 ml short of the correct total. • 675 ml: 675 ml is incorrect — it is 25 ml below the actual total. • 725 ml: 725 ml is incorrect — it is 25 ml more than the correct total. • 750 ml: 750 ml is incorrect — it overstates the total by 50 ml.
Q10The prescription is for 90 mg and the vial concentration is 30 mg per ml. What volume should be prepared?
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✓ Correct answer: 3 ml
90 mg ÷ 30 mg/ml = 3 ml, delivering precisely the prescribed dose. Why the other options are incorrect: • 2 ml: 2 ml at 30 mg/ml gives only 60 mg — 30 mg short of what is required. • 4 ml: 4 ml delivers 120 mg, which is 30 mg more than the 90 mg ordered. • 5 ml: 5 ml would give 150 mg — 60 mg above the prescribed amount. • 6 ml: 6 ml contains 180 mg, which is double the required 90 mg.
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