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 - ANSWER-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. ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/25 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 - ANSWER-$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% ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/25 C 200 mL of the 50% and 400 mL of the 5% D 300 mL of the 50% and 300 mL of the 5% - ANSWER-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 - ANSWER-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? ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/25 A 40 minutes B 125 minutes C 50 minutes D 100 minutes - ANSWER-125 minutes 10 gtt/mL means 10 drops per mL. So for 500 mL you will get: 10 X 500 = 5,000 drops. The flow rate is 40 gtt/min, which means 40 drops per minute, so divide total drops by 40 to get the number of minutes: 5,000/40 = 125. Convert 5.5 kg to pounds. A 1.21 lb B 55 lb C 12.1 lb D 0.55 lb - ANSWER-12.1 lb ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 5/25 A kilogram is equal to 2.2 pounds. 5.5 X 2.2 = 12.1 The percent equivalent of a 1:125 ratio is: A 12.5% B 0.8% C 8.0% D 0.08% - ANSWER-0.8% Percent means parts per hundred. 1/125 = x/100 which means 125x = 100 which m