Qualification of DHS MCQs With Answer

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

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