PTCB Practice Test #6 2

Question 1

A laminar flow hood must be operated for how long before use to ensure a clean environment?

Accepted Answer

30 minutes

Answer

According to USP 797 guidelines, laminar airflow workbenches (LAFWs) must be operated for at least 30 minutes before being used for sterile compounding to ensure adequate air purging.

Question 2

Which of the following is the correct ISO class for a horizontal laminar airflow workbench (LAFW) used for IV compounding?

Accepted Answer

ISO Class 5

Answer

The critical zone (where sterile products are prepared) in a LAFW must meet ISO Class 5 (formerly Class 100), with no more than 3,520 particles ≥ 0.5 µm per cubic meter of air.

Question 3

What is the correct technique for withdrawing medication from a single-dose vial?

Accepted Answer

Inject air equal to the volume you will withdraw, then pull back on the syringe

Answer

When withdrawing from a vial, inject a volume of air equal to the volume to be withdrawn to create positive pressure, facilitating fluid withdrawal. For multi-dose vials, this prevents creation of a vacuum.

Question 4

How should a pharmacy technician respond if they discover a medication error after dispensing?

Accepted Answer

Report it immediately to the pharmacist

Answer

Medication errors must be reported immediately to the pharmacist, who determines patient safety risk and notifies the prescriber if needed. Transparency is essential for patient safety and error prevention programs.

Question 5

Which of the following describes the "right" way to document a controlled substance wastage?

Accepted Answer

Wastage must be witnessed and co-signed by a second licensed healthcare provider

Answer

Controlled substance wastage must be witnessed by a second authorized healthcare provider and co-signed on the appropriate documentation to ensure accountability and prevent diversion.

Pharmacy Practice Test

Pharmacy Practice Test

PTCB Practice Test #6 2