ACSA NCSO Exam Questions and Verified Answers | Complete
and Accurate | 2026/2027 Edition
1. What is the primary role of a National Construction Safety
Officer (NCSO) on a construction project?
• A) Managing company payroll and financial accounts
• B) Administering and implementing the company health
and safety program
• C) Designing structural engineering blueprints
• D) Procuring construction materials and equipment
• Answer: B
• Rationale: An NCSO assists management in maintaining,
administering, and evaluating the safety program to ensure
compliance with OHS regulations and minimize workplace
losses.
2. Which legal concept serves as a primary defense for
employers facing strict liability charges under occupational
health and safety legislation?
• A) Ignorance of the law
• B) Due diligence
• C) Production pressure exemption
, • D) Subcontractor waiver
• Answer: B
• Rationale: Demonstrating due diligence (proving that all
reasonable care was exercised through foreseeability,
preventability, and control) is a recognized defense in strict
liability offenses.
3. How many core elements comprise the standard ACSA
Certificate of Recognition (COR) audit tool?
• A) 8 elements
• B) 10 elements
• C) 12 elements
• D) 14 elements
• Answer: B
• Rationale: The ACSA COR audit tool evaluates Health and
Safety Management Systems (HSMS) using 10 standard
audit elements.
4. What formula calculates the Lost Time Frequency Rate
(LTFR)?
• A) (Lost work days × 100,000)/Total employee hours
• B) (Lost time cases × 200,000)/Total employee hours
• C) (Medical aids × 200,000)/Total employee hours
, • D) (Total recordable incidents × 1,000,000)/
Total employee hours
• Answer: B
• Rationale: LTFR scales lost time cases against a baseline of
200,000 hours (equivalent to 100 full-time workers
working a full year).
5. What are the three foundational factors that establish legal
"due diligence"?
• A) Planning, Execution, Monitoring
• B) Foreseeability, Preventability, Control
• C) Assessment, Mitigation, Review
• D) Budgeting, Staffing, Training
• Answer: B
• Rationale: To prove due diligence, an organization must
show it could foresee risks, had the capability to prevent
them, and maintained active control over the
environment.
6. According to the hierarchy of controls, which measure is
considered the least effective method of hazard mitigation?
• A) Elimination
• B) Engineering controls
, • C) Administrative controls
• D) Personal Protective Equipment (PPE)
• Answer: D
• Rationale: PPE relies on human behavior and does not
eliminate or alter the hazard at the source; therefore, it
ranks lowest in effectiveness compared to elimination or
engineering controls.
7. What are the three levels of incident causes typically
identified during an effective accident investigation?
• A) Primary, Secondary, Tertiary
• B) Direct, Basic, Root
• C) Minor, Moderate, Catastrophic
• D) Internal, External, Environmental
• Answer: B
• Rationale: Investigations identify direct causes (energy
transfer/contact), basic/indirect causes (job/personal
factors), and root causes (management system failures).
8. What is the primary purpose of conducting regular
workplace safety inspections?
• A) To penalize non-compliant workers
and Accurate | 2026/2027 Edition
1. What is the primary role of a National Construction Safety
Officer (NCSO) on a construction project?
• A) Managing company payroll and financial accounts
• B) Administering and implementing the company health
and safety program
• C) Designing structural engineering blueprints
• D) Procuring construction materials and equipment
• Answer: B
• Rationale: An NCSO assists management in maintaining,
administering, and evaluating the safety program to ensure
compliance with OHS regulations and minimize workplace
losses.
2. Which legal concept serves as a primary defense for
employers facing strict liability charges under occupational
health and safety legislation?
• A) Ignorance of the law
• B) Due diligence
• C) Production pressure exemption
, • D) Subcontractor waiver
• Answer: B
• Rationale: Demonstrating due diligence (proving that all
reasonable care was exercised through foreseeability,
preventability, and control) is a recognized defense in strict
liability offenses.
3. How many core elements comprise the standard ACSA
Certificate of Recognition (COR) audit tool?
• A) 8 elements
• B) 10 elements
• C) 12 elements
• D) 14 elements
• Answer: B
• Rationale: The ACSA COR audit tool evaluates Health and
Safety Management Systems (HSMS) using 10 standard
audit elements.
4. What formula calculates the Lost Time Frequency Rate
(LTFR)?
• A) (Lost work days × 100,000)/Total employee hours
• B) (Lost time cases × 200,000)/Total employee hours
• C) (Medical aids × 200,000)/Total employee hours
, • D) (Total recordable incidents × 1,000,000)/
Total employee hours
• Answer: B
• Rationale: LTFR scales lost time cases against a baseline of
200,000 hours (equivalent to 100 full-time workers
working a full year).
5. What are the three foundational factors that establish legal
"due diligence"?
• A) Planning, Execution, Monitoring
• B) Foreseeability, Preventability, Control
• C) Assessment, Mitigation, Review
• D) Budgeting, Staffing, Training
• Answer: B
• Rationale: To prove due diligence, an organization must
show it could foresee risks, had the capability to prevent
them, and maintained active control over the
environment.
6. According to the hierarchy of controls, which measure is
considered the least effective method of hazard mitigation?
• A) Elimination
• B) Engineering controls
, • C) Administrative controls
• D) Personal Protective Equipment (PPE)
• Answer: D
• Rationale: PPE relies on human behavior and does not
eliminate or alter the hazard at the source; therefore, it
ranks lowest in effectiveness compared to elimination or
engineering controls.
7. What are the three levels of incident causes typically
identified during an effective accident investigation?
• A) Primary, Secondary, Tertiary
• B) Direct, Basic, Root
• C) Minor, Moderate, Catastrophic
• D) Internal, External, Environmental
• Answer: B
• Rationale: Investigations identify direct causes (energy
transfer/contact), basic/indirect causes (job/personal
factors), and root causes (management system failures).
8. What is the primary purpose of conducting regular
workplace safety inspections?
• A) To penalize non-compliant workers
