Prefilled syringe and needle-free injection technology MCQs With Answer

Introduction: Prefilled Syringe and Needle-Free Injection Technology MCQs With Answer

This quiz set focuses on advanced aspects of prefilled syringes and needle-free injection technologies relevant to M.Pharm students specializing in Pharmaceutical Manufacturing Technology. Questions cover device design, materials science, filling and sterilization processes, regulatory expectations, compatibility issues, extractables/leachables, container-closure integrity, stability of biologics, and operational parameters of jet injectors. The aim is to test and deepen understanding of practical manufacturing challenges, risk mitigation strategies, and quality control methods used when developing and producing parenteral delivery systems. These MCQs combine theoretical concepts with applied problem-solving to prepare candidates for industry and regulatory scenarios.

Q1. Which ISO or regulatory reference is most commonly cited for general requirements of prefilled syringe systems used for injectable drug products?

• ISO 11040 series for injection containers and accessories
• ISO 9001 Quality Management Systems
• ICH Q1A Stability Testing of New Drug Substances and Products
• USP <711> Dissolution

Correct Answer: ISO 11040 series for injection containers and accessories

Q2. What is the primary material characteristic of glass Type I (borosilicate) that makes it preferred for high-value biologic prefilled syringes?

• High sodium content for flexibility
• High chemical resistance and low alkali leachables
• Opacity to protect light-sensitive drugs
• Low hardness enabling easy machining

Correct Answer: High chemical resistance and low alkali leachables

Q3. Which container-closure integrity (CCI) test is most appropriate to detect micro-leaks in assembled prefilled syringes without destroying the sample?

• Dye ingress test with methylene blue
• High-voltage leak detection
• Microbial challenge with Bacillus spores
• Helium mass spectrometry leak detection (non-destructive mode)

Correct Answer: Helium mass spectrometry leak detection (non-destructive mode)

Q4. Silicone oil is commonly used to lubricate syringe barrels. Which is the main formulation risk associated with silicone oil for protein therapeutics?

• Loss of pH stability in the drug solution
• Silicone-mediated protein aggregation and particle formation
• Promotes microbial growth inside the syringe
• Increases ionic strength of the solution

Correct Answer: Silicone-mediated protein aggregation and particle formation

Q5. During filling of prefilled syringes for a sterile biologic, which step is most critical to control to minimize air entrapment and subsequent particle formation?

• Stopper insertion depth and timing
• Rubber stopper color selection
• Visual inspection lighting intensity
• Secondary packaging carton design

Correct Answer: Stopper insertion depth and timing

Q6. Which sterilization method is generally avoided for most protein-filled prefilled syringes due to likely denaturation of the active biological molecule?

• Aseptic processing with sterile filtration
• Gamma irradiation at high dose
• Ethylene oxide sterilization with long aeration
• Steam sterilization (autoclaving) of final filled syringes

Correct Answer: Steam sterilization (autoclaving) of final filled syringes

Q7. What is a principal advantage of dual-chamber prefilled syringe designs for certain parenteral products?

• Allows immediate mixing of lyophilized drug and diluent at point of use
• Reduces overall packaging volume compared to vials
• Eliminates need for needle safety features
• Makes the syringe reusable for multiple doses

Correct Answer: Allows immediate mixing of lyophilized drug and diluent at point of use

Q8. Which parameter of a needle-free jet injector primarily determines skin penetration depth and dose delivery accuracy?

• Volume of the syringe barrel attached to the injector
• Exit orifice geometry and liquid velocity (jet power)
• Color of the injector housing
• Ambient humidity in the clinic

Correct Answer: Exit orifice geometry and liquid velocity (jet power)

Q9. For regulatory E&L (extractables and leachables) assessment of a prefilled syringe, what is the typical initial step performed by manufacturers?

• Compile patient-reported outcome data
• Conduct accelerated photostability testing only
• Perform a comprehensive extractables study using aggressive solvents and conditions
• Run in-use microbiological surveillance after market launch

Correct Answer: Perform a comprehensive extractables study using aggressive solvents and conditions

Q10. Which USP chapter outlines requirements for particulate matter in injections and is critical for prefilled syringes?

• USP <71> Sterility Tests
• USP <788> Particulate Matter in Injections
• USP <795> Pharmaceutical Compounding — Nonsterile Preparations
• USP <51> Antimicrobial Effectiveness Testing

Correct Answer: USP <788> Particulate Matter in Injections

Q11. Which mechanical failure mode is of greatest concern for prefilled syringes during transport and can lead to breakage or loss of sterility?

• Plunger rod color fading
• Glass barrel fracture due to impact or stress corrosion
• Syringe label adhesive failure
• Insufficient outer carton printing quality

Correct Answer: Glass barrel fracture due to impact or stress corrosion

Q12. When evaluating compatibility between an elastomeric stopper and a drug product, which analytical endpoint is most directly relevant?

• Color of the stopper under visible light
• Quantification of leachables that may affect drug potency or safety
• Stopper hardness measured by Shore A only
• Size of the stopper relative to barrel diameter

Correct Answer: Quantification of leachables that may affect drug potency or safety

Q13. In validation of aseptic filling for prefilled syringes, which process performance qualification (PPQ) challenge is commonly used to demonstrate sterile performance?

• Large-scale photostability batches
• Media fill (process simulation) to challenge the aseptic process
• Color uniformity check of syringe plungers
• Freeze-thaw cycles of final product

Correct Answer: Media fill (process simulation) to challenge the aseptic process

Q14. Which design feature of prefilled syringes helps reduce sub-visible particle generation during storage and handling of protein therapeutics?

• Use of rigid polypropylene plungers with minimal silicone coating
• Opaque glass barrels to block light-induced aggregation
• Optimized siliconization method and low-friction plunger coatings to reduce shear at interfaces
• Extra-large needle gauge to reduce flow stress

Correct Answer: Optimized siliconization method and low-friction plunger coatings to reduce shear at interfaces

Q15. For needle-free jet injectors, which safety concern requires particular attention compared to needle-based injections?

• Cross-contamination via back-splash or device contamination between patients
• Needle-stick injuries to healthcare workers
• Difficulty in training staff to attach needles
• Disposal of large quantities of sharps waste

Correct Answer: Cross-contamination via back-splash or device contamination between patients

Q16. Which in-process control is critical during automated filling of prefilled syringes to ensure dose accuracy for low-volume biologic formulations?

• Monitoring ambient lighting near the line
• Real-time gravimetric or volumetric verification of fill weight
• Frequency of label printer maintenance
• Color matching of carton ink

Correct Answer: Real-time gravimetric or volumetric verification of fill weight

Q17. Which packaging consideration is most important for thermostable distribution of prefilled syringes containing mAbs requiring cold chain?

• Use of breathable secondary cartons to allow air exchange
• Validated insulated shippers with temperature monitors and appropriate coolant packs
• Printing storage instructions in multiple languages
• Minimizing carton size for retail shelving

Correct Answer: Validated insulated shippers with temperature monitors and appropriate coolant packs

Q18. Which testing approach is recommended to assess potential immunogenicity risks associated with protein aggregates formed in prefilled syringes?

• Only pH measurement of the formulation over time
• Characterization of sub-visible particles, aggregates, and in vitro immunogenicity assays
• Color stability testing under ambient light
• Viscosity measurement at a single time point only

Correct Answer: Characterization of sub-visible particles, aggregates, and in vitro immunogenicity assays

Q19. For a device intended to deliver a viscous biologic via a prefilled syringe, what syringe feature is most critical to ensure patient usability?

• Thinner syringe wall to reduce material cost
• Low breakaway and glide forces for the plunger to enable injection with reasonable user force
• Extra-long needle for deep intramuscular injection only
• Opaque plunger rod to prevent viewing of the fill level

Correct Answer: Low breakaway and glide forces for the plunger to enable injection with reasonable user force

Q20. Which analytical method is typically used to detect and quantify sub-visible particles (2–100 µm) in prefilled syringes during stability testing?

• Laser diffraction for particle size distribution above 1 mm
• Light obscuration (HIAC) and flow imaging microscopy
• pH meter and conductivity only
• Fourier-transform infrared spectroscopy (FTIR) exclusively

Correct Answer: Light obscuration (HIAC) and flow imaging microscopy

Download