Scale-Up Issues in Capsules MCQs With Answer

Scale-Up Issues in Capsules MCQs With Answer

This collection of multiple-choice questions focuses on the critical scale-up and technology transfer challenges encountered during capsule development and manufacturing. Aimed at M.Pharm students preparing for MIP 202T – Scale Up & Technology Transfer, the quiz covers formulation, equipment selection, powder handling, capsule shell behavior, process parameters, and regulatory considerations. Questions emphasize practical causes of variability such as blend segregation, dosing mechanisms, moisture control, lubricant effects, and machine-specific variables (dosator, auger, tamping). Answers highlight control strategies, measurement techniques, and scale-up criteria to help you deepen conceptual understanding and improve problem-solving skills for both exams and real-world batch scale-up scenarios.

Q1. What is the most common primary challenge when scaling up a capsule filling process?

• Meeting increased raw material lead times
• Maintaining blend uniformity and consistent fill weight
• Changing capsule color to meet marketing needs
• Obtaining larger capsule sizes from suppliers

Correct Answer: Maintaining blend uniformity and consistent fill weight

Q2. Which dosing mechanism is most suitable for accurately filling free‑flowing powders and granules at production scale?

• Dosator
• Auger filler
• Tamping pin
• Vacuum-assisted die

Correct Answer: Auger filler

Q3. During scale-up, powder segregation becomes more likely because of which factor?

• Decreased API potency
• Longer material handling, particle size and density differences
• Higher capsule moisture content only
• Use of gelatin vs HPMC shells

Correct Answer: Longer material handling, particle size and density differences

Q4. What is the recommended moisture content range for hard gelatin capsule shells to avoid brittleness or stickiness?

• 2–5%
• 6–9%
• 12–16%
• 20–25%

Correct Answer: 12–16%

Q5. In tamped dosing systems, which parameter most directly controls filled mass per capsule?

• Tamping depth
• Capsule color
• Ambient light levels
• Dosing disk diameter only

Correct Answer: Tamping depth

Q6. Which material attribute is most critical to control to minimize weight variation during capsule filling?

• Glass transition temperature
• Powder flowability and bulk density uniformity
• API crystalline form only
• Surface area of the capsule pin

Correct Answer: Powder flowability and bulk density uniformity

Q7. How does excess magnesium stearate typically affect capsule performance after scale-up?

• Enhances dissolution by increasing wettability
• Has no measurable effect on dissolution
• Reduces wettability and can slow dissolution
• Converts API into a different polymorph

Correct Answer: Reduces wettability and can slow dissolution

Q8. Which scale-up similarity criterion is most appropriate when scaling a tumbling blender to keep similar powder flow regimes?

• Constant power per unit volume
• Constant tip speed
• Constant Froude number
• Constant humidity

Correct Answer: Constant Froude number

Q9. Gelatin cross-linking that slows capsule dissolution is most frequently caused by exposure to which chemical class?

• Surfactants
• Aldehydes (e.g., formaldehyde)
• Plasticizers
• Antioxidants

Correct Answer: Aldehydes (e.g., formaldehyde)

Q10. Which test is essential during scale-up to confirm each capsule contains the intended amount of API?

• Uniformity of content (individual assay) test
• Color fastness test
• Disintegration only of pooled samples
• Particle size of the raw API only

Correct Answer: Uniformity of content (individual assay) test

Q11. Electrostatic charging of powder during high‑speed filling is best mitigated by which control measures?

• Lowering API potency and increasing filler
• Using ionizers, proper grounding and controlled humidity
• Increasing auger speed only
• Switching to gelatin shells

Correct Answer: Using ionizers, proper grounding and controlled humidity

Q12. A common cause for slower dissolution observed after scale-up is:

• Reduced capsule color contrast
• Increased fill density and decreased porosity of the compacted bed
• Smaller capsule size selection
• Lower API purity

Correct Answer: Increased fill density and decreased porosity of the compacted bed

Q13. Why is granulation often performed before capsule filling at commercial scale?

• To chemically modify the API
• To improve powder flowability and reduce segregation
• To increase manufacturing cost
• To change the capsule shell composition

Correct Answer: To improve powder flowability and reduce segregation

Q14. Compared to hard capsule filling, which factor is most critical when scaling up soft gelatin (softgel) fill operations?

• Color matching of shells
• Fill material viscosity and thermal sensitivity
• Using tamping pins
• Outsourcing capsule supply

Correct Answer: Fill material viscosity and thermal sensitivity

Q15. Which instrument provides the most direct, quantitative assessment of flow and shear properties for powders used in capsules?

• High-performance liquid chromatograph (HPLC)
• Mass spectrometer
• Powder shear cell (powder rheometer)
• UV-Vis spectrophotometer

Correct Answer: Powder shear cell (powder rheometer)

Q16. Capsule size selection during scale-up primarily depends on which two factors?

• Color and transparency of shell
• Fill-weight requirement and powder bulk density
• Machine brand and ambient temperature
• Marketing preference and tablet hardness

Correct Answer: Fill-weight requirement and powder bulk density

Q17. Adding colloidal silicon dioxide (glidant) at optimal levels typically results in:

• Worse flowability and immediate segregation
• Improved bulk flow and reduced friction between particles
• Conversion of API to amorphous form
• Complete elimination of electrostatics

Correct Answer: Improved bulk flow and reduced friction between particles

Q18. For process qualification during capsule scale-up, regulatory guidance commonly expects which minimum number of consecutive successful batches?

• One
• Two
• Three
• Five

Correct Answer: Three

Q19. Which environmental parameter is most important to control in a capsule filling area to prevent shell deformation and powder issues?

• Relative humidity
• Ambient light intensity
• Background noise levels
• Courier delivery schedules

Correct Answer: Relative humidity

Q20. The primary objective when scaling up capsule manufacturing from pilot to production scale is to:

• Reduce the number of operators regardless of product quality
• Maintain product critical quality attributes by controlling critical process parameters
• Change formulation to lower raw material cost only
• Switch all processes to continuous mode without qualification

Correct Answer: Maintain product critical quality attributes by controlling critical process parameters

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