NEBOSH Award in Oil and Gas
Operational Safety – Practice Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following best defines a hazard in an oil and gas
operational environment?
A. An event that causes an accident
B. Anything with the potential to cause harm
C. A type of risk assessment
D. A safety procedure
B. Anything with the potential to cause harm
Rationale: A hazard is defined as anything that has the potential to
cause injury, ill health, damage to property, or harm to the environment.
Identifying hazards is the first step in risk management.
, 2. What is the primary purpose of a risk assessment in oil and gas
operations?
A. To eliminate all risks
B. To comply with legislation only
C. To identify hazards and implement control measures
D. To record incidents
C. To identify hazards and implement control measures
Rationale: Risk assessments aim to evaluate potential hazards and
implement measures to control or mitigate them, thereby reducing the
likelihood and severity of accidents.
3. In oil and gas operations, which hierarchy of control is considered
the most effective method to control hazards?
A. Personal protective equipment (PPE)
B. Administrative controls
C. Elimination of the hazard
D. Training programs
C. Elimination of the hazard
Rationale: The hierarchy of control ranks hazard control measures by
effectiveness. Eliminating the hazard entirely is the most effective,
followed by substitution, engineering controls, administrative controls,
and PPE as the last line of defense.
, 4. What is the key reason for using a permit-to-work (PTW) system?
A. To reduce paperwork
B. To ensure hazardous work is carried out safely
C. To track employee working hours
D. To identify hazards
B. To ensure hazardous work is carried out safely
Rationale: PTW systems provide a formalized approach to controlling
high-risk work activities, ensuring that work is planned, authorized, and
carried out safely.
5. Which of the following is considered a major hazard in offshore oil
and gas operations?
A. Paper cuts
B. Fire and explosion
C. Noise from office equipment
D. Slip on wet floors
B. Fire and explosion
Rationale: Major hazards in oil and gas include high-consequence
events like fires, explosions, hydrocarbon releases, and well blowouts
due to the presence of flammable substances.
6. What does HAZID stand for in oil and gas safety management?
A. Hazard Identification
, B. Hazard Identification and Decision
C. Hazard Identification and Determination
D. Hazard Identification
A. Hazard Identification
Rationale: HAZID is a structured technique used to identify hazards and
their potential consequences early in the design or operational phases.
7. What is the primary purpose of a Safety Case in offshore
operations?
A. To calculate operational costs
B. To demonstrate that risks are reduced as low as reasonably
practicable (ALARP)
C. To provide emergency contact details
D. To report incidents
B. To demonstrate that risks are reduced as low as reasonably
practicable (ALARP)
Rationale: A Safety Case shows that the operator has systematically
assessed hazards and implemented controls to reduce risks to ALARP
levels, complying with regulatory requirements.
8. In oil and gas operations, which gas is particularly associated with
asphyxiation hazards?
A. Carbon monoxide (CO)
Operational Safety – Practice Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following best defines a hazard in an oil and gas
operational environment?
A. An event that causes an accident
B. Anything with the potential to cause harm
C. A type of risk assessment
D. A safety procedure
B. Anything with the potential to cause harm
Rationale: A hazard is defined as anything that has the potential to
cause injury, ill health, damage to property, or harm to the environment.
Identifying hazards is the first step in risk management.
, 2. What is the primary purpose of a risk assessment in oil and gas
operations?
A. To eliminate all risks
B. To comply with legislation only
C. To identify hazards and implement control measures
D. To record incidents
C. To identify hazards and implement control measures
Rationale: Risk assessments aim to evaluate potential hazards and
implement measures to control or mitigate them, thereby reducing the
likelihood and severity of accidents.
3. In oil and gas operations, which hierarchy of control is considered
the most effective method to control hazards?
A. Personal protective equipment (PPE)
B. Administrative controls
C. Elimination of the hazard
D. Training programs
C. Elimination of the hazard
Rationale: The hierarchy of control ranks hazard control measures by
effectiveness. Eliminating the hazard entirely is the most effective,
followed by substitution, engineering controls, administrative controls,
and PPE as the last line of defense.
, 4. What is the key reason for using a permit-to-work (PTW) system?
A. To reduce paperwork
B. To ensure hazardous work is carried out safely
C. To track employee working hours
D. To identify hazards
B. To ensure hazardous work is carried out safely
Rationale: PTW systems provide a formalized approach to controlling
high-risk work activities, ensuring that work is planned, authorized, and
carried out safely.
5. Which of the following is considered a major hazard in offshore oil
and gas operations?
A. Paper cuts
B. Fire and explosion
C. Noise from office equipment
D. Slip on wet floors
B. Fire and explosion
Rationale: Major hazards in oil and gas include high-consequence
events like fires, explosions, hydrocarbon releases, and well blowouts
due to the presence of flammable substances.
6. What does HAZID stand for in oil and gas safety management?
A. Hazard Identification
, B. Hazard Identification and Decision
C. Hazard Identification and Determination
D. Hazard Identification
A. Hazard Identification
Rationale: HAZID is a structured technique used to identify hazards and
their potential consequences early in the design or operational phases.
7. What is the primary purpose of a Safety Case in offshore
operations?
A. To calculate operational costs
B. To demonstrate that risks are reduced as low as reasonably
practicable (ALARP)
C. To provide emergency contact details
D. To report incidents
B. To demonstrate that risks are reduced as low as reasonably
practicable (ALARP)
Rationale: A Safety Case shows that the operator has systematically
assessed hazards and implemented controls to reduce risks to ALARP
levels, complying with regulatory requirements.
8. In oil and gas operations, which gas is particularly associated with
asphyxiation hazards?
A. Carbon monoxide (CO)
