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Pharmacy Technician

PTCB Nonsterile Compounding Certificate Examination Practice Test

Nonsterile compounding combines measurement, ingredient handling, and dosage-form preparation outside sterile environments. This practice material samples calculations involving mass and liquid density, powder blending, particle-size considerations, and incorporation of poorly water-soluble ingredients into creams. It also touches on selecting equipment, reducing contamination risk, and packaging oral liquids for consistent patient measurement.

Exam overview

Exam providerPharmacy Technician Certification Board
Exam codeNot listed
CategoryPharmacy Technician

About the PTCB Nonsterile Compounding Certificate Examination Exam

Nonsterile preparation calls for accurate quantities and suitable techniques for the ingredients and dosage form. Calculation work includes interpreting balance precision and converting a measured liquid volume to mass using density. Powder handling includes trituration and geometric dilution, in which portions are combined progressively to distribute a small-quantity ingredient through a larger blend. Formulation decisions may involve distinguishing a solution from a suspension, considering how solubility affects ingredient incorporation, and recognizing why particle size can influence a preparation. Practical workflow also includes choosing a mortar-and-pestle pairing for the task, limiting contamination during handling, and selecting a measuring device or package feature that supports repeatable home doses. These concepts connect calculations and bench technique to the consistency and usability of a compounded product.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A formula contains 30 mL of a liquid with a density of 1.2 g/mL. What is the liquid's mass?

  1. A25 g
  2. B31.2 g
  3. C36 g
  4. D360 g
Show answerCorrect answer: C

Mass equals volume multiplied by density: 30 mL × 1.2 g/mL = 36 g. The milliliter units cancel, leaving grams.

Question 2

During geometric dilution of a powder blend, what is the appropriate general sequence for adding the diluent?

  1. AAdd all the diluent at once and stir only the surface
  2. BAdd an amount of diluent approximately equal to the powder mixture, mix thoroughly, and repeat in portions
  3. CAdd the diluent only after the blend has been packaged
  4. DAdd progressively smaller portions without mixing between additions
Show answerCorrect answer: B

Geometric dilution generally involves mixing the smaller amount of ingredient with a similar amount of diluent, then adding further portions with thorough mixing. This is a way to promote uniform distribution when combining powders.

Question 3

A formulation uses a water-soluble ingredient in a water-based preparation. Which general statement about the ingredient is accurate?

  1. AIt can dissolve in the aqueous vehicle when the formulation conditions permit
  2. BIt must always be levigated with oil
  3. CIt cannot be used in a liquid preparation
  4. DIt will necessarily remain as visible particles
Show answerCorrect answer: A

A water-soluble ingredient may dissolve in an aqueous vehicle when concentration, pH, and other formulation conditions are suitable. The actual formula and ingredient properties still need to be followed.

Question 4

A prescription calls for a cream containing an ingredient that is poorly soluble in water. Which preparation approach is generally appropriate when incorporating the ingredient as a fine solid into the cream base?

  1. ADissolve it in water regardless of its solubility
  2. BLevigation with a compatible liquid to form a smooth paste before incorporation
  3. CHeat it until it becomes a gas
  4. DAdd it directly to the finished cream without mixing
Show answerCorrect answer: B

Levigation reduces particle size and helps wet a solid with a compatible liquid, producing a smooth paste that can be incorporated more evenly into a base. The liquid must be suitable for the ingredient and formulation.

Question 5

A technician needs to prepare a product using an ingredient with a specified particle-size range. Why can particle size matter?

  1. AIt can affect dissolution, texture, and uniformity of distribution
  2. BIt determines whether the preparation is sterile
  3. CIt changes the patient’s prescribed route automatically
  4. DIt guarantees a particular beyond-use date
Show answerCorrect answer: A

Particle size can influence how quickly a solid dissolves, the texture of a preparation, and how evenly particles are distributed. It does not by itself establish sterility, route, or beyond-use date.

Question 6

A technician needs to triturate a small quantity of a solid ingredient for a nonsterile compound. Which equipment pairing is intended for this task?

  1. AMortar and pestle
  2. BGraduated cylinder and funnel
  3. CFilter paper and forceps
  4. DThermometer and spatula
Show answerCorrect answer: A

A mortar and pestle are commonly used to reduce particle size and mix small quantities of solids. Other tools may support measuring or transferring, but are not the standard pairing for trituration.

Question 7

When preparing a nonsterile compound, which action best reduces the risk of contaminating the preparation?

  1. AKeep the container open while gathering ingredients
  2. BClean the compounding work surface before beginning
  3. CUse the same spatula for every ingredient without cleaning it
  4. DPlace ingredient containers directly on the floor
Show answerCorrect answer: B

Cleaning the work surface before compounding helps remove residue and contaminants that could enter the preparation. Tools and containers should also be handled in a way that avoids cross-contamination.

How to use this practice test

The free practice session draws up to 20 random questions from the 50-question bank. Work through the calculations and preparation scenarios, then use the displayed results to identify topics to revisit, such as density, geometric dilution, dosage-form distinctions, or contamination control.

Preparation tips

  • Practice converting liquid volume to mass with density, and check that the units cancel correctly.
  • For geometric dilution exercises, track how each portion of diluent is combined with the existing powder blend.
  • Compare solutions and suspensions by asking whether the ingredient dissolves in the vehicle; connect that distinction to preparation and dose measurement.
  • Review how particle size and trituration affect solid ingredients, and match the task to appropriate mortar-and-pestle equipment.
  • For oral-liquid scenarios, identify packaging or measuring features that help patients deliver consistent doses at home.
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