Home

Tutoring

Subjects

Live Classes

Study Coach

Essay Review

On-Demand Courses

Colleges

Games

Opening subject page...

Loading your content

← Back to quizzes

Nclexpn

Nclexpn Quiz: Iv Flow Rate Calculations

Practice Iv Flow Rate Calculations in Nclexpn with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Iv Flow Rate Calculations, giving you a quick way to practice the rules, question types, and explanations that matter most for Nclexpn.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

An order is written to infuse 250 mL of packed red blood cells (PRBCs) over 4 hours. The blood tubing has a drop factor of 10 gtt/mL.

The nurse calculates that the manual infusion rate should be set to how many drops per minute (gtt/min)? (Round to the nearest whole number).

  1. 10 gtt/min
  2. 21 gtt/min
  3. 42 gtt/min
  4. 63 gtt/min
Explanation: First, convert the infusion time to minutes: (4 \text{ hours} \times 60 \text{ min/hr} = 240 \text{ minutes}). Then use the drip rate formula: (\text{Rate (gtt/min)} = \frac{\text{Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Time (min)}}). So, (\frac{250 \text{ mL} \times 10 \text{ gtt/mL}}{240 \text{ min}} = \frac{2500}{240} = 10.416... \text{ gtt/min}). Rounding to the nearest whole number gives 10 gtt/min.

Question 2

A client is to receive vancomycin 1 g in 250 mL of D5W to be infused over 90 minutes.

To administer this medication, the nurse should set the infusion pump to what rate in mL/hr? (Round to the nearest whole number).

  1. 167 mL/hr
  2. 188 mL/hr
  3. 250 mL/hr
  4. 278 mL/hr
Explanation: The formula for rate is volume divided by time. To get a rate in mL per hour, the time must be in hours. Convert 90 minutes to hours: (\frac{90 \text{ min}}{60 \text{ min/hr}} = 1.5 \text{ hours}). Now, calculate the rate: (\frac{250 \text{ mL}}{1.5 \text{ hr}} = 166.66... \text{ mL/hr}). Rounding to the nearest whole number gives 167 mL/hr.

Question 3

A primary health care provider orders 1,000 mL of 0.9% sodium chloride to be infused intravenously over 8 hours for a client who is dehydrated.

The nurse is preparing to set the infusion pump. At what rate, in mL/hr, should the nurse set the pump? (Round to the nearest whole number).

  1. 100 mL/hr
  2. 125 mL/hr
  3. 150 mL/hr
  4. 80 mL/hr
Explanation: To calculate the infusion rate in mL/hr, divide the total volume in mL by the total time in hours. The formula is: (\text{Rate (mL/hr)} = \frac{\text{Total Volume (mL)}}{\text{Total Time (hr)}}). In this case, (\frac{1000 \text{ mL}}{8 \text{ hr}} = 125 \text{ mL/hr}).

Question 4

A primary health care provider orders an IV fluid bolus of 500 mL of 0.9% sodium chloride to be administered over 2 hours.

The nurse should set the infusion pump to deliver how many mL/hr?

  1. 125 mL/hr
  2. 200 mL/hr
  3. 250 mL/hr
  4. 500 mL/hr
Explanation: To find the rate in mL/hr, the nurse should divide the total volume to be infused by the total number of hours for the infusion. The calculation is: (\frac{500 \text{ mL}}{2 \text{ hours}} = 250 \text{ mL/hr}).

Question 5

A client needs to receive 1200 mL of an IV solution over 10 hours. The IV administration set delivers 20 gtt/mL.

The nurse should regulate the manual IV infusion to deliver how many drops per minute (gtt/min)?

  1. 20 gtt/min
  2. 30 gtt/min
  3. 40 gtt/min
  4. 60 gtt/min
Explanation: First, calculate the total infusion time in minutes: (10 \text{ hours} \times 60 \text{ min/hr} = 600 \text{ minutes}). Next, use the drip rate formula: (\text{Rate (gtt/min)} = \frac{\text{Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Time (min)}}). So, (\frac{1200 \text{ mL} \times 20 \text{ gtt/mL}}{600 \text{ min}} = \frac{24000}{600} = 40 \text{ gtt/min}).

Question 6

A pediatric client is to receive 50 mL of an antibiotic solution over 1 hour. The IV is to be administered using a microdrip tubing set.

The nurse should set the gravity flow rate to how many drops per minute (gtt/min)?

  1. 25 gtt/min
  2. 50 gtt/min
  3. 60 gtt/min
  4. 100 gtt/min
Explanation: Microdrip tubing always has a drop factor of 60 gtt/mL. The formula for drip rate is (\text{Rate (gtt/min)} = \frac{\text{Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Time (min)}}). The time is 1 hour, which is 60 minutes. So, (\frac{50 \text{ mL} \times 60 \text{ gtt/mL}}{60 \text{ min}} = 50 \text{ gtt/min}). A useful shortcut for microdrip tubing is that the rate in mL/hr is equal to the rate in gtt/min.

Question 7

A provider orders an IV infusion of 1 L of D5 1/2 NS with 20 mEq of KCl to run over 10 hours.

At what rate in mL/hr should the nurse program the infusion pump?

  1. 100 mL/hr
  2. 120 mL/hr
  3. 150 mL/hr
  4. 200 mL/hr
Explanation: The volume to be infused is 1 L, which is equal to 1,000 mL. The medication (20 mEq of KCl) is dissolved in this volume and does not change the total volume for calculation purposes. To find the rate, divide the total volume by the total time: (\frac{1000 \text{ mL}}{10 \text{ hours}} = 100 \text{ mL/hr}).

Question 8

A client is to receive an IV piggyback (IVPB) of cefazolin 1 g in 50 mL D5W over 20 minutes.

The nurse needs to program the infusion pump. What is the correct rate in mL/hr?

  1. 100 mL/hr
  2. 150 mL/hr
  3. 200 mL/hr
  4. 250 mL/hr
Explanation: To calculate the rate in mL/hr for an infusion over minutes, use the formula: (\text{Rate (mL/hr)} = \frac{\text{Volume (mL)}}{\text{Time (min)}} \times 60 \text{ min/hr}). So, (\frac{50 \text{ mL}}{20 \text{ min}} \times 60 \text{ min/hr} = 2.5 \times 60 = 150 \text{ mL/hr}).

Question 9

A client has an IV infusion of 1000 mL D5W running at 150 mL/hr. At the beginning of the shift, the nurse notes 800 mL remaining in the bag.

How many hours will it take for the remaining fluid to infuse completely? (Round to the nearest tenth).

  1. 5.3 hours
  2. 6.0 hours
  3. 6.7 hours
  4. 8.0 hours
Explanation: To calculate the remaining infusion time, divide the remaining volume by the infusion rate. The formula is: (\text{Time (hr)} = \frac{\text{Remaining Volume (mL)}}{\text{Rate (mL/hr)}}). Using the values: (\frac{800 \text{ mL}}{150 \text{ mL/hr}} = 5.333... \text{ hours}). Rounding to the nearest tenth gives 5.3 hours.

Question 10

A client is receiving total parenteral nutrition (TPN). The order is to infuse 2,400 mL over 24 hours.

The nurse should ensure the infusion pump is programmed to deliver the TPN at what rate?

  1. 80 mL/hr
  2. 100 mL/hr
  3. 120 mL/hr
  4. 240 mL/hr
Explanation: To calculate the hourly rate for the infusion pump, divide the total volume by the total time. The formula is (\text{Rate (mL/hr)} = \frac{\text{Total Volume (mL)}}{\text{Total Time (hr)}}). In this case, (\frac{2400 \text{ mL}}{24 \text{ hr}} = 100 \text{ mL/hr}).

Question 11

A client is receiving an IV infusion at a rate of 80 mL/hr. The nurse starts a 1,000 mL bag of fluid.

How many hours will it take for the entire bag to infuse?

  1. 8.0 hours
  2. 10.5 hours
  3. 12.5 hours
  4. 15.0 hours
Explanation: To determine the total infusion time, divide the total volume by the rate of infusion. The formula is: (\text{Time (hr)} = \frac{\text{Total Volume (mL)}}{\text{Rate (mL/hr)}}). In this case, (\frac{1000 \text{ mL}}{80 \text{ mL/hr}} = 12.5 \text{ hours}).

Question 12

An order is written to infuse 3,000 mL of an IV solution over 24 hours.

The nurse should program the infusion pump to deliver the fluid at what rate in mL/hr?

  1. 100 mL/hr
  2. 125 mL/hr
  3. 150 mL/hr
  4. 175 mL/hr
Explanation: To calculate the rate in mL/hr, divide the total volume by the total time. The calculation is: (\frac{3000 \text{ mL}}{24 \text{ hours}} = 125 \text{ mL/hr}).

Question 13

A client is ordered to receive 100 mL of an IV solution over 15 minutes.

The nurse should set the infusion pump to deliver the solution at what rate in mL/hr?

  1. 100 mL/hr
  2. 200 mL/hr
  3. 300 mL/hr
  4. 400 mL/hr
Explanation: There are four 15-minute periods in one hour (60 min / 15 min = 4). To find the hourly rate, multiply the volume by this factor: (100 \text{ mL} \times 4 = 400 \text{ mL/hr}). Alternatively, use the formula: (\text{Rate (mL/hr)} = \frac{\text{Volume (mL)}}{\text{Time (min)}} \times 60 \text{ min/hr}). So, (\frac{100 \text{ mL}}{15 \text{ min}} \times 60 \text{ min/hr} = 400 \text{ mL/hr}).

Question 14

A health care provider orders 250 mL of D5W to be infused over 3 hours. The available IV tubing has a drop factor of 20 gtt/mL.

The nurse should regulate the gravity infusion to what rate in drops per minute (gtt/min)? (Round to the nearest whole number).

  1. 14 gtt/min
  2. 28 gtt/min
  3. 46 gtt/min
  4. 83 gtt/min
Explanation: First, convert the infusion time to minutes: (3 \text{ hours} \times 60 \text{ min/hr} = 180 \text{ minutes}). Then, apply the formula for drip rate: (\text{Rate (gtt/min)} = \frac{\text{Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Time (min)}}). So, (\frac{250 \text{ mL} \times 20 \text{ gtt/mL}}{180 \text{ min}} = \frac{5000}{180} = 27.77... \text{ gtt/min}). Rounding to the nearest whole number gives 28 gtt/min.

Question 15

A client is to receive 500 mL of an IV fluid over 5 hours.

The nurse should program the infusion pump to deliver how many mL/hr?

  1. 50 mL/hr
  2. 75 mL/hr
  3. 100 mL/hr
  4. 125 mL/hr
Explanation: The calculation for the rate in mL/hr is the total volume in mL divided by the total time in hours. (\frac{500 \text{ mL}}{5 \text{ hours}} = 100 \text{ mL/hr}).

Question 16

A client has a continuous IV infusion of 0.9% sodium chloride. The infusion pump is set at 125 mL/hr. The nurse hangs a new 1,000 mL bag at 1200 (noon).

The nurse should anticipate the infusion will be complete at what time?

  1. 1800
  2. 2000
  3. 2200
  4. 2400
Explanation: First, calculate the total infusion time by dividing the volume by the rate: (\frac{1000 \text{ mL}}{125 \text{ mL/hr}} = 8 \text{ hours}). If the infusion is started at 1200, it will be complete 8 hours later. 1200 + 8 hours = 2000.

Question 17

An order is written for a client to receive 500 mL of Dextrose 5% in Water (D5W) intravenously over 4 hours. The available IV tubing has a drop factor of 15 gtt/mL.

The nurse is setting up the infusion to run by gravity. At what rate, in drops per minute (gtt/min), should the nurse regulate the IV? (Round to the nearest whole number).

  1. 21 gtt/min
  2. 31 gtt/min
  3. 83 gtt/min
  4. 125 gtt/min
Explanation: The formula for calculating the drip rate is: (\text{Rate (gtt/min)} = \frac{\text{Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Time (min)}}). First, convert the time from hours to minutes: (4 \text{ hours} \times 60 \text{ min/hr} = 240 \text{ minutes}). Then, apply the formula: (\frac{500 \text{ mL} \times 15 \text{ gtt/mL}}{240 \text{ min}} = \frac{7500}{240} = 31.25 \text{ gtt/min}). Rounding to the nearest whole number gives 31 gtt/min.

Question 18

A client is to receive 1.5 L of Lactated Ringer's solution over 12 hours.

The nurse should program the infusion pump to deliver the fluid at what rate in mL/hr?

  1. 80 mL/hr
  2. 100 mL/hr
  3. 125 mL/hr
  4. 150 mL/hr
Explanation: First, convert the volume from liters (L) to milliliters (mL). Since 1 L = 1,000 mL, 1.5 L = 1,500 mL. Next, calculate the rate in mL/hr by dividing the total volume by the total time: (\frac{1500 \text{ mL}}{12 \text{ hr}} = 125 \text{ mL/hr}).

Question 19

A provider orders 500 mL of an IV solution to infuse over 8 hours. The IV administration set has a drop factor of 60 gtt/mL (microdrip).

The nurse should set the manual infusion to deliver how many drops per minute (gtt/min)? (Round to the nearest whole number).

  1. 42 gtt/min
  2. 50 gtt/min
  3. 63 gtt/min
  4. 80 gtt/min
Explanation: First, convert the infusion time to minutes: (8 \text{ hours} \times 60 \text{ min/hr} = 480 \text{ minutes}). Next, use the drip rate formula: (\text{Rate (gtt/min)} = \frac{\text{Volume (mL)} \times \text{Drop Factor (gtt/mL)}}{\text{Time (min)}}). So, (\frac{500 \text{ mL} \times 60 \text{ gtt/mL}}{480 \text{ min}} = \frac{30000}{480} = 62.5 \text{ gtt/min}). Rounding to the nearest whole number gives 63 gtt/min.

Question 20

A client is to receive regular insulin by continuous intravenous infusion. The pharmacy prepares a solution of 100 units of regular insulin in 100 mL of 0.9% sodium chloride. The order is to infuse at 6 units/hour.

The nurse should program the infusion pump to deliver how many mL/hr?

  1. 6 mL/hr
  2. 10 mL/hr
  3. 16 mL/hr
  4. 60 mL/hr
Explanation: First, determine the concentration of the insulin solution. There are 100 units in 100 mL, which simplifies to 1 unit/mL. The order is for 6 units per hour. Since the concentration is 1 unit per mL, to deliver 6 units, the nurse must infuse 6 mL. Therefore, the rate is 6 mL/hr.