TheoryHESI A2 Practice Questions
Free HESI A2 practice questions with answers and plain-English explanations. Browse the PDF, video and online mock test.
HESI A2 Questions
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Q1A patient needs to take 3/4 of a 500 mg tablet twice daily. How many milligrams does the patient receive per day?
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✓ Correct answer: 750 mg
3/4 of 500 mg = 375 mg per dose; twice daily gives 375 × 2 = 750 mg total.
Q2A nurse converts 2.5 liters to milliliters. What is the correct result?
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✓ Correct answer: 2500 mL
There are 1000 mL per liter, so 2.5 × 1000 = 2500 mL.
Q3A patient weighs 176 pounds. Using the conversion 2.2 lb = 1 kg, what is the patient's weight in kilograms?
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✓ Correct answer: 80 kg
176 ÷ 2.2 = 80 kg exactly, since 80 × 2.2 = 176.
Q4A stock solution contains 250 mg of medication in every 5 mL. What is the concentration in mg per mL?
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✓ Correct answer: 50 mg/mL
250 mg ÷ 5 mL = 50 mg/mL; dividing total amount by total volume yields unit concentration.
Q5A recipe requires a 3:5 ratio of sugar to flour. If 18 grams of sugar are used, how many grams of flour are needed?
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✓ Correct answer: 30 g
Setting up the proportion 3/5 = 18/x gives x = (18 × 5) ÷ 3 = 30 g of flour.
Q6An IV bag holds 500 mL and must infuse over 4 hours. How many milliliters per minute should the pump deliver (rounded to the nearest hundredth)?
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✓ Correct answer: 2.08 mL/min
500 mL ÷ (4 hr × 60 min/hr) = 500 ÷ 240 ≈ 2.08 mL/min.
Q7A drug is dosed at 0.05 mg/kg for a patient weighing 66 kg. The available vial contains 1.5 mg/mL. How many milliliters should be drawn up?
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✓ Correct answer: 2.2 mL
Required dose = 0.05 × 66 = 3.3 mg; volume = 3.3 ÷ 1.5 = 2.2 mL.
Q8Solve for x: 4x − 7 = 2x + 11
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✓ Correct answer: x = 9
Subtract 2x: 2x − 7 = 11; add 7: 2x = 18; divide by 2: x = 9.
Q9A medication label reads '0.25 mg per tablet.' A physician orders 1.5 mg. How many tablets should be administered?
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✓ Correct answer: 6 tablets
Tablets = ordered dose ÷ dose per tablet = 1.5 ÷ 0.25 = 6 tablets.
Q10A clinical supply budget increased from $4,800 to $6,000. What is the percentage increase?
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✓ Correct answer: 25%
Percentage increase = (increase ÷ original) × 100 = (1200 ÷ 4800) × 100 = 25%.
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