Equipment Selection for Parenterals MCQs With Answer

Introduction: This quiz set on “Equipment Selection for Parenterals” is designed for M.Pharm students studying Scale Up & Technology Transfer (MIP 202T). It focuses on practical and regulatory considerations when choosing equipment for sterile parenteral manufacturing: cleanability and sterilizability, material selection, containment, filtration, transfer systems, and validation requirements. Questions challenge understanding of design features (surface finish, drainability, valves, pumps), sterile barriers (isolators, RABS), sterilization modalities (steam, dry heat, filtration), and scale-up impacts on aseptic processing and environmental control. Use these MCQs to test conceptual knowledge, aid exam preparation, and reinforce decisions required for compliant parenteral production.

Q1. What is the most critical equipment attribute to ensure sterility during parenteral manufacturing?

• Ease of operator training
• Cleanability and ability to be sterilized without compromising integrity
• Low initial capital cost
• Brand reputation of the manufacturer

Correct Answer: Cleanability and ability to be sterilized without compromising integrity

Q2. Which material of construction is preferred for parenteral process equipment due to corrosion resistance and cleanability?

• Untreated carbon steel
• 316L stainless steel with electropolished surface
• Aluminum alloy with painted finish
• Polypropylene sheet metal

Correct Answer: 316L stainless steel with electropolished surface

Q3. For aseptic liquid filling of parenterals, which filling technology best minimizes product contact with the environment?

• Open-bowl gravity filling
• Isolator-based closed aseptic filling line
• Manual syringe filling in a laminar hood
• Non-sterile pump filling followed by terminal sterilization

Correct Answer: Isolator-based closed aseptic filling line

Q4. Which filtration pore size is typically used for terminal sterile filtration of aqueous parenteral solutions to retain bacteria?

• 0.45 µm
• 0.22 µm
• 0.1 µm
• 1.2 µm

Correct Answer: 0.22 µm

Q5. When selecting a pump for sterile parenteral transfer that avoids product shear and particulate generation, which is most appropriate?

• Centrifugal high-speed pump
• Peristaltic pump or gentle piston pump designed for sterile transfer
• Open-impeller axial flow pump
• Air-lift pump with exposed rotors

Correct Answer: Peristaltic pump or gentle piston pump designed for sterile transfer

Q6. Which valve type is preferred in sanitary parenteral systems to minimize dead leg and facilitate cleaning and sterilization?

• Standard gate valve with long bonnet
• Sanitary diaphragm valve or fully drained aseptic valve
• Butterfly valve with pocketed seat
• Plug valve without CIP capability

Correct Answer: Sanitary diaphragm valve or fully drained aseptic valve

Q7. In selection of a lyophilizer for parenteral freeze-drying, which specification most directly affects scale-up from lab to production?

• Color of cabinet
• Shelf surface area and heat transfer coefficient
• Number of doors for operator access only
• Type of lighting inside the chamber

Correct Answer: Shelf surface area and heat transfer coefficient

Q8. For depyrogenation of glass vials before aseptic filling, what equipment is commonly selected?

• Low-temperature humidification tunnel
• Dry-heat depyrogenation tunnel or oven operating at validated temperature/time
• Cold-water rinse station
• Gamma irradiation unit situated post-filling

Correct Answer: Dry-heat depyrogenation tunnel or oven operating at validated temperature/time

Q9. When choosing between single‑use systems and stainless-steel equipment for parenteral manufacturing, which is a valid advantage of single-use?

• Unlimited solvent compatibility
• Reduced cleaning validation burden and faster changeover
• Lower per-batch consumable cost for high-volume continuous production
• Better long-term robustness for steam sterilization

Correct Answer: Reduced cleaning validation burden and faster changeover

Q10. Which air filtration device is specified for supplying ISO Class 5 (Grade A) air in an aseptic filling zone?

• Pre-filter only
• HEPA filter rated 99.97% at 0.3 µm
• Activated carbon filter
• Coarse particle filter (G4)

Correct Answer: HEPA filter rated 99.97% at 0.3 µm

Q11. What is a primary reason to select an isolator over a RABS for highly potent parenteral manufacture?

• Isolators are cheaper to install
• Isolators provide superior physical separation and operator containment for higher containment needs
• RABS offer better operator visibility for sterile interventions
• Isolators require less engineered airflow control

Correct Answer: Isolators provide superior physical separation and operator containment for higher containment needs

Q12. During equipment selection, why is surface roughness (Ra) specified for stainless steel contact parts?

• Smoother surfaces reduce microbial attachment and improve cleanability
• Rougher surfaces are cheaper to polish
• Higher Ra values improve heat transfer
• Surface roughness is unrelated to cleaning effectiveness

Correct Answer: Smoother surfaces reduce microbial attachment and improve cleanability

Q13. Which sterilization method is best suited for prefilled syringes filled with a thermolabile biologic that cannot tolerate heat?

• Dry heat depyrogenation at 250°C
• Steam autoclave at 121°C
• Aseptic processing with sterile filtration and sterile filling
• Ethylene oxide sterilization without validation

Correct Answer: Aseptic processing with sterile filtration and sterile filling

Q14. What equipment feature is most important to prevent microbial ingress at sterile connections during transfer?

• Use of non-validated hose clamps
• Validated sterile connectors (aseptic quick connectors) and closed transfer systems
• Manual open-bag transfer under general room air
• Relying solely on operator skill without barrier technology

Correct Answer: Validated sterile connectors (aseptic quick connectors) and closed transfer systems

Q15. For scale-up, which factor of an aseptic filling line most directly impacts particle generation and thus environmental classification?

• Label printer brand
• Filling speed and mechanical design leading to turbulence and droplet formation
• Color of conveyor belts
• Operator uniform fabric composition only

Correct Answer: Filling speed and mechanical design leading to turbulence and droplet formation

Q16. Which validation requirement influences the choice of an autoclave for sterilizing equipment and components?

• Autoclave door color
• Ability to demonstrate uniform temperature distribution and biological indicator kill across loads
• Number of control panels on the unit
• Compatibility with open-air drying only

Correct Answer: Ability to demonstrate uniform temperature distribution and biological indicator kill across loads

Q17. When designing piping for parenteral processes, what is the preferred approach to minimize contamination risk?

• Create multiple dead-end branches to allow sampling
• Design fully drainable, sloped piping with tri-clamp sanitary fittings and no dead legs
• Use threaded joints to speed assembly
• Place low points without drains to reduce cost

Correct Answer: Design fully drainable, sloped piping with tri-clamp sanitary fittings and no dead legs

Q18. Which in‑line monitoring or test is essential to verify filter integrity after sterile filtration in parenteral manufacture?

• Visual color check only
• Differential pressure without challenge testing
• Bubble point or diffusion test for filter integrity
• pH measurement of filtrate only

Correct Answer: Bubble point or diffusion test for filter integrity

Q19. What is a key consideration when selecting equipment for handling cytotoxic parenterals to protect operators and product?

• Open handling under laminar flow only
• Containment features, closed systems, appropriate exhaust HEPA/HEPA or dedicated HVAC and validated decontamination
• Operators should rely on PPE alone
• Using standard non-segregated utilities

Correct Answer: Containment features, closed systems, appropriate exhaust HEPA/HEPA or dedicated HVAC and validated decontamination

Q20. Which criterion is most important when selecting a filling needle or nozzle for sterile vial filling to reduce particle generation and maintain sterility?

• Needle material and finish to ensure smooth flow and minimize cavitation and aerosolization
• Needle color matching the line
• Using the longest possible needle regardless of flow dynamics
• Needles with rough machined surfaces to reduce cost

Correct Answer: Needle material and finish to ensure smooth flow and minimize cavitation and aerosolization

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