PTCB Practice Exam 5
1. If a physician writes an order for 400 mL of D5W to be infused over a 4-hourtime 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 = 20drops per
minute.
2. A drug sells for $29.99 retail and has a wholesale cost of $19.74.Thedispensing 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 tosubtract the
dispensing cost as well.
3. You are planning to prepare 600 mL of 20% dextrose solution,by mixing your5% 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%
Answer: 200 mL of the 50% and 400 mL of the 5%
4. Seventy-four degrees Fahrenheit is equal to what temperature in Celsius?