Qualification of DHS MCQs With Answer
Introduction: This quiz set on the qualification of DHS is designed for M.Pharm students studying MIP 202T – Scale Up & Technology Transfer. The questions focus on practical and regulatory aspects of qualifying equipment and systems referred to as DHS within a manufacturing environment, emphasizing IQ/OQ/PQ phases, protocol preparation, acceptance criteria, risk assessment, utilities, calibration and documentation practices. Each question reinforces deeper understanding of validation lifecycle, critical quality attributes and process parameters, FAT/SAT distinctions, computerized system considerations and requalification triggers. Use these MCQs for self-assessment and exam preparation to build competence in systematic technology transfer and scale-up qualification practices.
Q1. What is the primary objective of Installation Qualification (IQ) for a DHS?
- To demonstrate the process can produce acceptable product quality over time
- To verify that the DHS is installed according to design and manufacturer specifications
- To optimize process parameters for maximum yield
- To validate analytical methods used for product testing
Correct Answer: To verify that the DHS is installed according to design and manufacturer specifications
Q2. What is the correct sequence of qualification stages for a DHS?
- PQ → OQ → IQ
- OQ → IQ → PQ
- IQ → OQ → PQ
- IQ → PQ → OQ
Correct Answer: IQ → OQ → PQ
Q3. Factory Acceptance Testing (FAT) is typically performed:
- After installation at the user site to verify process performance
- At the vendor’s site before shipment to verify design and functionality
- Only during PQ with production materials
- Only for computerized systems and not for mechanical equipment
Correct Answer: At the vendor’s site before shipment to verify design and functionality
Q4. Operational Qualification (OQ) primarily verifies:
- That the equipment is physically installed according to drawings
- The equipment operates correctly across intended operating ranges and alarms function
- Long-term stability of the final product in packaging
- The training competency of operations staff
Correct Answer: The equipment operates correctly across intended operating ranges and alarms function
Q5. Performance Qualification (PQ) should demonstrate:
- Compliance of supplier quality systems
- That the DHS performs under simulated laboratory conditions
- That the DHS performs reliably under actual production conditions with real materials
- Only that instruments are calibrated to specifications
Correct Answer: That the DHS performs reliably under actual production conditions with real materials
Q6. Acceptance criteria for qualification tests must be:
- Established during PQ after test results are reviewed
- Defined and documented in protocols before testing
- Left to the discretion of the operator conducting the test
- Identical across all types of equipment regardless of intended use
Correct Answer: Defined and documented in protocols before testing
Q7. Which guidance document is widely used for validation of computerized systems in pharmaceutical operations?
- ISO 9001
- GAMP 5
- ICH Q3
- USP General Notices
Correct Answer: GAMP 5
Q8. In DHS qualification, a Critical Quality Attribute (CQA) is best defined as:
- A production parameter unrelated to product quality
- A property that must be within defined limits to ensure product quality
- An equipment maintenance checklist item
- A supplier performance metric
Correct Answer: A property that must be within defined limits to ensure product quality
Q9. The frequency of requalification for a DHS should be decided based on:
- Manufacturer’s suggested retail price
- A fixed calendar interval only, regardless of usage
- Change control actions, risk assessment and preventive maintenance history
- The preference of the operations manager
Correct Answer: Change control actions, risk assessment and preventive maintenance history
Q10. Calibration certificates used during qualification should be traceable to:
- The manufacturer’s in-house standards only
- National or international standards (e.g., NIST)
- Previous calibration certificates without calibration data
- Arbitrary internal references created at installation
Correct Answer: National or international standards (e.g., NIST)
Q11. Which document should generally be completed before initiating any qualification activity for a DHS?
- Performance Qualification report
- User Requirements Specification (URS)
- Final batch record
- Marketing authorization dossier
Correct Answer: User Requirements Specification (URS)
Q12. Cleaning validation of DHS product-contact surfaces is required when:
- The system is used only for non-pharmaceutical utilities
- There is any potential for product cross-contamination between batches
- The equipment is disposable and single-use for all products
- Operators manually clean using a visual inspection only
Correct Answer: There is any potential for product cross-contamination between batches
Q13. During OQ, alarm and interlock setpoints should be:
- Documented but not tested to avoid interruption of equipment
- Tested and verified against predefined acceptance criteria
- Ignored and tested only during PQ
- Left configurable by end-users without documentation
Correct Answer: Tested and verified against predefined acceptance criteria
Q14. How many consecutive successful production batches are generally required to demonstrate PQ for a DHS?
- One batch is always sufficient
- Three consecutive successful batches is the common regulatory expectation
- Ten batches irrespective of results
- No batches are needed if OQ passed
Correct Answer: Three consecutive successful batches is the common regulatory expectation
Q15. The main difference between preventive maintenance (PM) and calibration in qualification activities is:
- PM ensures measurement accuracy; calibration prevents mechanical failure
- PM ensures mechanical reliability and longevity; calibration ensures measurement accuracy
- There is no difference; both terms are interchangeable
- Calibration is only for electrical systems while PM is for software
Correct Answer: PM ensures mechanical reliability and longevity; calibration ensures measurement accuracy
Q16. Which qualification phase is the most appropriate to validate automated control logic and sequence of operations for DHS?
- IQ, because it documents installation drawings only
- OQ, because it verifies operation of control logic across setpoints
- PQ, because control logic is validated during long-term production runs only
- No qualification phase; control logic does not need validation
Correct Answer: OQ, because it verifies operation of control logic across setpoints
Q17. Utility qualification (e.g., for compressed air or chilled water) is important for DHS because:
- Utilities never influence product quality
- Qualified utilities ensure consistent supply and meet quality requirements impacting process performance
- Utilities are only relevant for office buildings, not manufacturing
- Utility qualification replaces the need for equipment qualification
Correct Answer: Qualified utilities ensure consistent supply and meet quality requirements impacting process performance
Q18. Which records must be retained as part of DHS qualification documentation?
- Only the final PQ report; IQ and OQ can be discarded
- All protocols, raw data, reports, deviations, and approvals generated during qualification
- Only calibration certificates with no supporting data
- Only electronic logs without signed reports
Correct Answer: All protocols, raw data, reports, deviations, and approvals generated during qualification
Q19. Applying ICH Q9 risk management during DHS qualification primarily helps to:
- Eliminate the need for IQ altogether
- Identify critical aspects and prioritize testing to focus on patient safety and product quality
- Reduce documentation requirements to a minimum
- Set marketing strategies for the product
Correct Answer: Identify critical aspects and prioritize testing to focus on patient safety and product quality
Q20. Which event typically triggers a requirement for partial or full requalification of a DHS?
- Routine daily use without any changes
- A significant modification to the system, relocation, or major repair
- Receipt of routine spare parts with no system change
- Completion of a single successful PQ batch two years ago
Correct Answer: A significant modification to the system, relocation, or major repair
