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IV Flow Rates & IV Medication Dosage Calculation Questions and Answers

180 Questions and Answers

$5.99

Mastering IV flow rates and dosage calculations is essential for any healthcare professional involved in patient care. This comprehensive practice exam is designed to strengthen your understanding of intravenous medication administration, with a strong focus on real-world clinical application and safety protocols.

This resource dives deep into critical areas such as IV fluid volume calculation, flow rate determination (drops per minute and mL per hour), dosage conversion between units, and time-based medication calculations. It also emphasizes dimensional analysis, ratio-proportion methods, and formula-based calculations to help you approach problems with confidence and precision.

Whether you’re preparing for nursing exams, clinical assessments, or working to enhance your on-the-job accuracy, this exam-style quiz provides targeted practice aligned with common testing frameworks. You’ll engage with realistic scenarios involving IV pumps, gravity flow systems, and drug dosage intervals—key components for medical professionals in both acute care and outpatient settings.

Topics include:

  • Calculating flow rates (gtt/min, mL/hr)

  • IV drip factor adjustments

  • Medication reconstitution and dilution

  • Dosage per weight (mg/kg/hr)

  • Time-to-completion for IV infusions

  • Converting between metric units (mcg, mg, g, mL, L)

  • Pediatric IV dosage calculations

  • Safety and error prevention in IV medication administration

This learning tool supports the development of clinical math proficiency, ideal for nursing students, paramedics, pharmacists, and other allied health professionals. All questions are based on updated medical standards and practices, offering realistic simulations that test both speed and accuracy under timed conditions.

Additionally, this exam preparation material is ideal for brushing up on core skills required for success in healthcare certifications and real-world medication delivery scenarios. With this focused learning content, you’ll strengthen your ability to interpret physician orders, calculate dosages accurately, and deliver medications safely—making you a more competent and confident healthcare provider.

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Sample Questions and Answers

A physician orders 1,000 mL of D5W to be infused over 8 hours. What is the IV flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 200 mL/hr

Answer: B. 125 mL/hr

An order states: Administer 500 mL of NS over 4 hours. What is the IV flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 175 mL/hr

Answer: B. 125 mL/hr

A client is to receive 250 mL of a medication over 2 hours using an infusion pump. What is the flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 250 mL/hr
D. 300 mL/hr

Answer: C. 250 mL/hr

The order reads: Infuse 1,000 mL of NS over 10 hours. Calculate the flow rate in drops per minute (gtt/min) if the drop factor is 15 gtt/mL.

15 gtt/min
B. 20 gtt/min
C. 25 gtt/min
D. 30 gtt/min

Answer: C. 25 gtt/min

How many milliliters are required to deliver a medication if the dose is 50 mg and the concentration is 25 mg/mL?

1 mL
B. 2 mL
C. 3 mL
D. 4 mL

Answer: B. 2 mL

A prescription requires administering 75 mL/hr for 6 hours. How much fluid will the patient receive in total?

400 mL
B. 450 mL
C. 500 mL
D. 600 mL

Answer: D. 600 mL

A nurse is to administer 250 mL of an antibiotic over 2 hours. The drop factor is 20 gtt/mL. Calculate the flow rate in gtt/min.

20 gtt/min
B. 25 gtt/min
C. 42 gtt/min
D. 50 gtt/min

Answer: C. 42 gtt/min

A patient is prescribed 1,500 mL of D5NS over 12 hours. What is the IV flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 175 mL/hr

Answer: C. 150 mL/hr

An infusion is ordered to deliver 100 mL/hr with a drop factor of 10 gtt/mL. What is the flow rate in gtt/min?

10 gtt/min
B. 15 gtt/min
C. 17 gtt/min
D. 20 gtt/min

Answer: D. 20 gtt/min

A patient is prescribed 500 mL of NS to infuse over 4 hours. What is the IV flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 200 mL/hr

Answer: B. 125 mL/hr

If the dose of a drug is 250 mg and the available solution is 500 mg/10 mL, how many milliliters will you administer?

5 mL
B. 10 mL
C. 15 mL
D. 20 mL

Answer: A. 5 mL

The doctor orders 0.5 L of NS to be infused over 6 hours. Calculate the flow rate in mL/hr.

75 mL/hr
B. 80 mL/hr
C. 83.3 mL/hr
D. 90 mL/hr

Answer: C. 83.3 mL/hr

A patient is ordered to receive 2 g of a medication. The medication is available as 1 g/5 mL. How many milliliters will you administer?

5 mL
B. 10 mL
C. 15 mL
D. 20 mL

Answer: B. 10 mL

An infusion of 250 mL is to be given over 3 hours. The drop factor is 15 gtt/mL. What is the flow rate in gtt/min?

15 gtt/min
B. 20 gtt/min
C. 21 gtt/min
D. 25 gtt/min

Answer: C. 21 gtt/min

The nurse is to administer 100 mL/hr for 8 hours. How many mL will the patient receive in total?

700 mL
B. 800 mL
C. 850 mL
D. 900 mL

Answer: B. 800 mL

A prescription states: Administer 250 mL of IV fluid over 4 hours. What is the IV flow rate in mL/hr?

50 mL/hr
B. 62.5 mL/hr
C. 70 mL/hr
D. 80 mL/hr

Answer: B. 62.5 mL/hr

The doctor prescribes 1 L of LR to be infused over 10 hours. What is the IV flow rate in mL/hr?

80 mL/hr
B. 90 mL/hr
C. 100 mL/hr
D. 120 mL/hr

Answer: C. 100 mL/hr

A medication is prescribed as 1.5 g, but the vial contains 750 mg/3 mL. How many mL will you administer?

3 mL
B. 6 mL
C. 9 mL
D. 12 mL

Answer: B. 6 mL

A patient is prescribed 200 mL of a medication over 2 hours. The drop factor is 20 gtt/mL. Calculate the IV flow rate in gtt/min.

25 gtt/min
B. 30 gtt/min
C. 33 gtt/min
D. 35 gtt/min

Answer: C. 33 gtt/min

An order is given for 500 mL of fluid over 5 hours. What is the IV flow rate in mL/hr?

80 mL/hr
B. 90 mL/hr
C. 100 mL/hr
D. 120 mL/hr

Answer: C. 100 mL/hr

 

An order states: Administer 1,200 mL of D5W over 24 hours using an infusion pump. What is the flow rate in mL/hr?

25 mL/hr
B. 50 mL/hr
C. 75 mL/hr
D. 100 mL/hr

Answer: B. 50 mL/hr

A patient is prescribed 100 mL of medication to be infused over 45 minutes. Calculate the flow rate in mL/hr.

100 mL/hr
B. 125 mL/hr
C. 133 mL/hr
D. 150 mL/hr

Answer: C. 133 mL/hr

The order is to infuse 800 mL of IV fluid over 16 hours. What is the flow rate in mL/hr?

40 mL/hr
B. 50 mL/hr
C. 60 mL/hr
D. 80 mL/hr

Answer: A. 50 mL/hr

A medication order requires administering 2 g of a drug available in 500 mg/5 mL. How many mL will you administer?

10 mL
B. 15 mL
C. 20 mL
D. 25 mL

Answer: C. 20 mL

A nurse is to administer 1,000 mL of LR over 12 hours. The drop factor is 20 gtt/mL. Calculate the flow rate in gtt/min.

20 gtt/min
B. 25 gtt/min
C. 27 gtt/min
D. 30 gtt/min

Answer: D. 30 gtt/min

The doctor orders 500 mL of NS to be infused at 125 mL/hr. How long will it take to complete the infusion?

3 hours
B. 4 hours
C. 5 hours
D. 6 hours

Answer: B. 4 hours

A prescription requires delivering 400 mL of IV fluid in 5 hours. What is the flow rate in mL/hr?

60 mL/hr
B. 70 mL/hr
C. 80 mL/hr
D. 90 mL/hr

Answer: C. 80 mL/hr

A medication is available as 10 mg/mL. How many mL will you administer for a dose of 25 mg?

2.5 mL
B. 5 mL
C. 7.5 mL
D. 10 mL

Answer: A. 2.5 mL

An IV infusion of 1,200 mL is ordered over 10 hours. What is the IV flow rate in mL/hr?

100 mL/hr
B. 110 mL/hr
C. 120 mL/hr
D. 130 mL/hr

Answer: C. 120 mL/hr

The order is to administer 1.5 L of D5W over 12 hours. The drop factor is 15 gtt/mL. Calculate the flow rate in gtt/min.

25 gtt/min
B. 31 gtt/min
C. 35 gtt/min
D. 38 gtt/min

Answer: B. 31 gtt/min

 

A physician orders 2 g of a medication to be diluted in 500 mL of NS and infused over 4 hours. What is the flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 175 mL/hr

Answer: B. 125 mL/hr

The order is to administer 50 mL/hr of IV fluid using a microdrip set with a drop factor of 60 gtt/mL. What is the flow rate in gtt/min?

30 gtt/min
B. 40 gtt/min
C. 50 gtt/min
D. 60 gtt/min

Answer: C. 50 gtt/min

A nurse is to give 1.5 L of IV fluid over 24 hours using an infusion pump. What is the flow rate in mL/hr?

50 mL/hr
B. 60 mL/hr
C. 65 mL/hr
D. 70 mL/hr

Answer: B. 60 mL/hr

The doctor orders 1 g of a medication to be infused over 2 hours. The solution contains 2 g in 500 mL. What is the flow rate in mL/hr?

100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 250 mL/hr

Answer: D. 250 mL/hr

The order is to infuse 600 mL of D5W over 3 hours. What is the flow rate in mL/hr?

150 mL/hr
B. 175 mL/hr
C. 200 mL/hr
D. 250 mL/hr

Answer: C. 200 mL/hr

A nurse is to administer 500 mL of IV fluid over 8 hours. The drop factor is 15 gtt/mL. What is the flow rate in gtt/min?

10 gtt/min
B. 15 gtt/min
C. 16 gtt/min
D. 20 gtt/min

Answer: B. 15 gtt/min

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FAQs

What is the IV Flow Rates & IV Medication Dosage Calculation Practice Test?
This practice test is an interactive self‑assessment tool offered by StudyLance, focused on intravenous (IV) flow rate and medication dosage calculations. It helps nursing and healthcare students sharpen skills like calculating drops per minute (gtt/min), milliliters per hour (mL/hr), and total infusion time.
Who should use this IV dosage calculation practice test?
This resource is ideal for nursing students preparing for exams (like NCLEX, PTCB), pharmacy tech candidates, medical assistants, and healthcare professionals needing hands‑on practice with IV calculation techniques and infusion scenarios.
What types of questions are included in the test?
Expect questions covering: IV fluid administration volume and duration. Drip factor and tubing type (microdrip vs macrodrip). gtt/min and mL/hr calculations. Infusion time estimations. IV piggyback medication scenarios. This ensures comprehensive coverage of all standard IV calculation formats These are designed to align with clinical standards and licensure exam formats, as seen on Preppool.com.
Do I need a calculator or special equipment to take the test?
While no special device is required, having basic tools like a calculator or pen and paper helps solve formula‑based questions. The format mimics real‑world clinical settings where quick calculations are vital.
Can I revisit the test or retry questions?
Yes. StudyLance allows multiple attempts, offering unlimited practice so you can reinforce weak spots until the calculations become second nature.

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