Batch reconciliation calculations MCQs With Answer

Introduction: This blog provides a focused set of 20 multiple-choice questions on batch reconciliation calculations tailored for M.Pharm students studying Documentation & Regulatory Writing. The questions cover conceptual principles and practical calculations used in batch reconciliation — including theoretical vs actual yield, percent yield, potency corrections, moisture and solvent losses, overfill, and acceptance criteria. Each MCQ is presented with four options and the correct answer is clearly indicated to help students practice problem-solving and prepare for exams and regulatory documentation tasks. Use these questions to strengthen your ability to detect, quantify and justify discrepancies in batch records and to document reconciliation in compliance with GMP.

Q1. What is the primary objective of batch reconciliation in pharmaceutical manufacturing?

• To calculate manufacturing costs and profit margins
• To compare theoretical and actual quantities to account for losses and ensure traceability
• To determine marketing strategies for new batches
• To standardize packaging artwork across batches

Correct Answer: To compare theoretical and actual quantities to account for losses and ensure traceability

Q2. How is theoretical yield defined in the context of batch reconciliation?

• The amount of finished product actually produced at the end of the process
• The maximum possible quantity of finished product calculated from input quantities and formulation
• The average expected saleable units after stability testing
• The difference between starting material weight and waste

Correct Answer: The maximum possible quantity of finished product calculated from input quantities and formulation

Q3. Which formula correctly calculates percent yield for a batch?

• (Theoretical / Actual) × 100
• (Actual − Theoretical) × 100
• (Actual / Theoretical) × 100
• (Actual × Theoretical) / 100

Correct Answer: (Actual / Theoretical) × 100

Q4. If the theoretical yield of a batch is 100 kg and the actual yield recovered is 96.5 kg, what is the percent yield?

• 3.5%
• 96.5%
• 100.5%
• 95.5%

Correct Answer: 96.5%

Q5. A process requires 100.000 g of pure API. The supplied API has an assay of 95.0% (w/w). How many grams of the supplied API must be weighed to provide 100.000 g of pure API?

• 95.000 g
• 100.000 g
• 105.263 g
• 1050.000 g

Correct Answer: 105.263 g

Q6. When should a batch reconciliation investigation be initiated?

• Only when a product fails stability testing
• Whenever there is any discrepancy regardless of magnitude
• When unexplained discrepancy exceeds predefined acceptance criteria and cannot be justified by records
• Only if the discrepancy results in a financial loss

Correct Answer: When unexplained discrepancy exceeds predefined acceptance criteria and cannot be justified by records

Q7. A wet intermediate weighed 150.0 kg. Laboratory analysis shows moisture loss on drying of 3.0% (w/w). What is the dry weight of the intermediate?

• 153.0 kg
• 150.0 kg
• 145.5 kg
• 3.0 kg

Correct Answer: 145.5 kg

Q8. A pilot batch of 10 kg consistently gives a yield of 9.6 kg (96.0%). If the process is scaled to a 100 kg theoretical batch, what yield is expected assuming identical performance?

• 9.6 kg
• 100.0 kg
• 96.0 kg
• 90.0 kg

Correct Answer: 96.0 kg

Q9. A tablet requires 50.00 mg of pure API. The API assay is 96.0% (w/w). What mass of API should be dispensed per tablet to meet the label claim?

• 48.000 mg
• 50.000 mg
• 52.083 mg
• 96.000 mg

Correct Answer: 52.083 mg

Q10. An API has an assay of 96.0% and water content (LOD) of 2.0%. What effective active content (%) should be used for potency correction in formulation calculations?

• 98.0%
• 2.0%
• 94.0%
• 96.0%

Correct Answer: 94.0%

Q11. Starting input of API was 500.0 g; expected API in final product was 480.0 g; actual recovered was 472.0 g. What is the unaccounted loss as a percentage of the expected amount?

• 1.60%
• 8.00%
• 1.67%
• 4.00%

Correct Answer: 1.67%

Q12. Target tablet weight of ingredient per tablet is 200.0 mg; sample average found is 203.0 mg. For a batch of 1,000 tablets, what is the per-tablet overfill and total overfill?

• Per tablet 3.0 mg; total 3.0 g
• Per tablet 203.0 mg; total 203.0 g
• Per tablet 0.03 mg; total 0.03 g
• Per tablet 200.0 mg; total 200.0 g

Correct Answer: Per tablet 3.0 mg; total 3.0 g

Q13. A solvent tank initially contained 100.0 L. After use and recovery, 92.0 L was reclaimed. What is the percent solvent loss?

• 8.0%
• 92.0%
• 0.8%
• 12.0%

Correct Answer: 8.0%

Q14. Which of the following best describes the regulatory significance of batch reconciliation?

• It documents marketing claims and advertising language
• It demonstrates material traceability, quantifies losses, and supports product disposition decisions
• It replaces stability studies for expired batches
• It primarily determines employee performance bonuses

Correct Answer: It demonstrates material traceability, quantifies losses, and supports product disposition decisions

Q15. For a 200.0 kg batch at 2.0% w/w API, required API amount is calculated. If 5.0 kg of API is available, what is the required API and surplus/shortage?

• Required API = 4.0 kg; surplus = 1.0 kg
• Required API = 10.0 kg; shortage = 5.0 kg
• Required API = 2.0 kg; surplus = 3.0 kg
• Required API = 5.0 kg; surplus = 0.0 kg

Correct Answer: Required API = 4.0 kg; surplus = 1.0 kg

Q16. What is the correct potency correction factor to calculate the amount of API to weigh when the measured assay is A%?

• Correction factor = A / 100
• Correction factor = 100 × A
• Correction factor = 100 / A
• Correction factor = A

Correct Answer: Correction factor = 100 / A

Q17. Which statement best reflects proper documentation practice for rounding reconciliation calculations?

• Apply any rounding method as long as the final number looks reasonable
• Follow the site-specific SOP for rounding consistently and record the rounding rules used
• Always round down to avoid overestimation
• Never round numbers; always report infinite decimal places

Correct Answer: Follow the site-specific SOP for rounding consistently and record the rounding rules used

Q18. If an API has a loss on drying (LOD) of 2.0%, how should this be accounted for in batch reconciliation when calculating active content?

• Ignore LOD since it is unrelated to potency
• Use dry active mass = weighed mass × (1 − LOD fraction) for potency and reconciliation calculations
• Add LOD percentage to the assay value
• Subtract LOD from the final product weight only

Correct Answer: Use dry active mass = weighed mass × (1 − LOD fraction) for potency and reconciliation calculations

Q19. Theoretical yield = 100.0 kg; actual recovered = 98.2 kg; acceptance criteria = 98.0% to 102.0%. Is the batch acceptable based on yield?

• Batch unacceptable; yield below 99.0%
• Batch acceptable; yield 98.2% within criteria
• Batch unacceptable; yield above 100.0%
• Acceptability cannot be determined without potency data

Correct Answer: Batch acceptable; yield 98.2% within criteria

Q20. Required pure API dose = 1000.0 mg. The API assay is 101.0% (w/w). What mass of the API should be weighed to obtain 1000.0 mg of pure API?

• 1010.000 mg
• 1000.000 mg
• 990.099 mg
• 100.000 mg

Correct Answer: 990.099 mg

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