PTCB Practice Exam (Math) Questions and Answers

PTCB Practice Exam (Math) Questions and Answers If a physician writes an order for 400 mL of D5W to be infused over a 4-hour time period, and the IV drop factor is 12 gtt/mL, how many drops per minute should be delivered? a. 12 gtt b. 2 gtt c. 1.67 gtt d. 20 gtt - ANS ️️ 20 gtt First find the total number of minutes: 60 X 4 = 240. Then find mL/min: 400 / 240 = 1.67 ml infused in 1 minute. Then multiply this by the drop factor: 1.67 X 12 = 20 drops per minute. A drug sells for $29.99 retail and has a wholesale cost of $19.74. The dispensing cost is $3.20. What is the pharmacy's net profit? A $10.25 B $29.99 C $3.20 D $7.05 - ANS ️️ $7.05 Gross profit is selling price minus purchase price. For net profit you also need to subtract the dispensing cost as well. You are planning to prepare 600 mL of 20% dextrose solution, by mixing your 5% and 50% dextrose solution. How much of each solution will be needed? A 350 mL of the 50% and 250 mL of the 5% B 300 mL of the 50% and 100 mL of the 5% C 200 mL of the 50% and 400 mL of the 5% D 300 mL of the 50% and 300 mL of the 5% - ANS ️️ 200 mL of the 50% and 400 mL of the 5% Seventy-four degrees Fahrenheit is equal to what temperature in Celsius? A 74.0 B 23.3 C 18.3 D 30.7 - ANS ️️ 23.3 To convert from Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and then divide by 1.8. An order is written for 500 mL of NS to infuse at 40 gtt/min. How long would it take to infuse the NS if the set delivers 10 gtt/mL? A 40 minutes B 125 minutes C 50 minutes D 100 minutes - ANS ️️ 125 minute