30 real Quality & Laboratory questions from the Plant Operations bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is QA vs QC?
Junior
A.quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
B.statistically defined number and location of samples, such as √n + 1 containers, drawn from top, middle and bottom of drums
C.index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
D.out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass
2. Which term means: "quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications"?
A.QA vs QC — out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass
B.QA vs QC — index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
C.QA vs QC — quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
D.QA vs QC — quality management system standard built on customer focus, process approach, risk-based thinking and PDCA, certified by third-party audit
A.demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release
B.separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
C.batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
D.liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection
5. Which term means: "batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment"?
A.Certificate of analysis — separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
B.Certificate of analysis — quality management system standard built on customer focus, process approach, risk-based thinking and PDCA, certified by third-party audit
C.Certificate of analysis — X-bar and R control charts with limits at ±3σ; a point outside or seven consecutive points on one side signals a special cause
D.Certificate of analysis — batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
A.index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
B.batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
C.separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
D.out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass
8. Which term means: "separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals"?
A.Gas chromatography — batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
B.Gas chromatography — out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass
C.Gas chromatography — quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
D.Gas chromatography — separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
11. Which term means: "liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection"?
A.HPLC — quality management system standard built on customer focus, process approach, risk-based thinking and PDCA, certified by third-party audit
B.HPLC — separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
C.HPLC — liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection
D.HPLC — demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release
14. Which term means: "out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass"?
A.OOS handling — liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection
B.OOS handling — index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
C.OOS handling — batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
D.OOS handling — out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass
A.separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
B.demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release
C.quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
D.statistically defined number and location of samples, such as √n + 1 containers, drawn from top, middle and bottom of drums
A.Sampling plan — demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release
B.Sampling plan — index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
C.Sampling plan — statistically defined number and location of samples, such as √n + 1 containers, drawn from top, middle and bottom of drums
D.Sampling plan — quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
20. Which term means: "demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release"?
A.Method validation (ICH Q2) — quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
B.Method validation (ICH Q2) — separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
C.Method validation (ICH Q2) — demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release
D.Method validation (ICH Q2) — out-of-specification result investigated in Phase I (laboratory error) and Phase II (manufacturing) before any retest, with no averaging to pass
A.quality management system standard built on customer focus, process approach, risk-based thinking and PDCA, certified by third-party audit
B.liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection
C.separation of volatile compounds by partition between carrier gas and column stationary phase, detected by FID or TCD, for solvent purity and residuals
D.batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
23. Which term means: "quality management system standard built on customer focus, process approach, risk-based thinking and PDCA, certified by third-party audit"?
A.ISO 9001 — batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
B.ISO 9001 — liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection
C.ISO 9001 — quality management system standard built on customer focus, process approach, risk-based thinking and PDCA, certified by third-party audit
D.ISO 9001 — statistically defined number and location of samples, such as √n + 1 containers, drawn from top, middle and bottom of drums
26. Which term means: "X-bar and R control charts with limits at ±3σ; a point outside or seven consecutive points on one side signals a special cause"?
A.Statistical process control — demonstration of specificity, linearity, accuracy, precision, LOD/LOQ and robustness before an analytical method is used for release
B.Statistical process control — X-bar and R control charts with limits at ±3σ; a point outside or seven consecutive points on one side signals a special cause
C.Statistical process control — quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
D.Statistical process control — index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
A.batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
B.liquid chromatography under high pressure for non-volatile or heat-sensitive compounds such as APIs, usually with UV detection
C.quality assurance is the system that prevents defects through procedures, audits and validation; quality control is testing materials and products against specifications
D.index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
29. Which term means: "index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process"?
A.Process capability Cpk — index of how well process spread fits inside specification limits allowing for centring, with 1.33 the usual minimum for a capable process
B.Process capability Cpk — X-bar and R control charts with limits at ±3σ; a point outside or seven consecutive points on one side signals a special cause
C.Process capability Cpk — statistically defined number and location of samples, such as √n + 1 containers, drawn from top, middle and bottom of drums
D.Process capability Cpk — batch document listing each specification parameter, method, limit and result, signed by QC, that accompanies a product shipment
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