Risk & Hazard Control Flashcards
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Read the first 7 Risk & Hazard Control flashcards as text
In the context of confined space entry, a 'non-permit required' confined space is one that:
Answer: Does not contain or have the potential to contain serious safety or health hazards
A non-permit confined space meets the definition of a confined space but does not contain atmospheric, engulfment, or other serious hazards requiring a permit.
The primary goal of a pre-task planning (PTP) meeting before beginning high-risk work is to:
Answer: Identify hazards, review controls, and ensure all workers understand safe work procedures
Pre-task planning meetings allow the work crew to collectively identify site-specific hazards, confirm controls are in place, and align on safe work methods before starting.
Which hazard control approach is exemplified by installing machine guards that automatically prevent access to danger zones during operation?
Answer: Engineering control
Machine guarding is an engineering control that physically prevents contact with hazardous parts, reducing risk without relying on worker behavior.
A chemical's Immediately Dangerous to Life or Health (IDLH) concentration is defined as the level that could:
Answer: Cause irreversible adverse health effects or impair escape within 30 minutes of exposure
IDLH concentrations are those that could cause irreversible harm or impair a worker's ability to escape in 30 minutes, used to select the highest-level respiratory protection.
Which of the following is the most effective way to verify that a hazard control measure is working?
Answer: Conducting post-control monitoring and measuring actual exposure or incident rates
Post-control monitoring through air sampling, noise dosimetry, injury rate tracking, or similar methods provides objective evidence that controls are achieving the intended risk reduction.
The concept of 'defense in depth' in safety management refers to:
Answer: Implementing multiple, independent layers of protection so that failure of one layer does not cause an incident
Defense in depth uses multiple overlapping safeguards so that if one control fails, others remain to prevent an incident — reducing reliance on any single barrier.
When a new chemical process is introduced to a workplace, the most proactive approach to hazard control is to:
Answer: Conduct a pre-startup safety review (PSSR) before operations begin
A PSSR ensures that safety, health, and environmental requirements are met before a new or modified process is started, identifying and correcting hazards proactively.