ExxonMobil Test ExxonMobil Safety and Compliance 2 — Questions and Answers
Question 1: What does a flammability range (Lower Explosive Limit to Upper Explosive Limit) indicate for a gas?
- The temperature range at which a gas becomes flammable
- The concentration range in air within which the gas can ignite (Correct answer)
- The pressure range required for combustion
- The duration a gas remains flammable after release
Correct answer: The concentration range in air within which the gas can ignite
The flammability range defines the concentration range (% in air) between which a gas mixture can ignite and burn.
Question 2: What is the hierarchy of controls in ExxonMobil's risk management framework, from most to least preferred?
- PPE → Engineering → Administrative → Elimination
- Administrative → PPE → Engineering → Elimination
- Elimination → Engineering → Administrative → PPE (Correct answer)
- Engineering → Elimination → Administrative → PPE
Correct answer: Elimination → Engineering → Administrative → PPE
The hierarchy of controls prioritizes elimination, then engineering controls, administrative controls, and finally PPE as the last resort.
Question 3: What minimum level of oxygen concentration must be maintained in a confined space for safe entry?
- 14%
- 16%
- 19.5% (Correct answer)
- 21%
Correct answer: 19.5%
OSHA requires a minimum of 19.5% oxygen concentration for safe entry into a confined space.
Question 4: An ExxonMobil worker observes a colleague bypassing a safety interlock. What should the worker do first?
- Report it to management at the end of the shift
- Ignore it if no immediate hazard is apparent
- Stop the work and address the unsafe act immediately (Correct answer)
- Document it in the logbook for future reference
Correct answer: Stop the work and address the unsafe act immediately
Safety culture requires immediate action when an unsafe act is observed; bypassing interlocks creates serious hazards.
Question 5: What does the GHS (Globally Harmonized System) diamond-shaped hazard pictogram with a flame indicate?
- Corrosive material
- Flammable material (Correct answer)
- Oxidizing material
- Explosive material
Correct answer: Flammable material
The GHS flame pictogram indicates flammable materials, including flammable liquids, solids, gases, and aerosols.
Question 6: In ExxonMobil's incident investigation process, what is a 'root cause'?
- The immediate physical event that caused the incident
- The underlying fundamental reason why an incident occurred (Correct answer)
- The person responsible for the incident
- The most recent action taken before the incident
Correct answer: The underlying fundamental reason why an incident occurred
A root cause is the fundamental reason an incident occurred; addressing it prevents recurrence, unlike treating surface-level symptoms.
ExxonMobil Test ExxonMobil Safety and Compliance 2
What does a flammability range (Lower Explosive Limit to Upper Explosive Limit) indicate for a gas?