COSS Hazard Recognition and Control 5 — Questions and Answers
Question 1: Which type of confined space requires a written permit, attendant, and trained entry supervisor before entry?
- Non-permit required confined space
- Permit-required confined space (Correct answer)
- Restricted access space
- Regulated confined space
Correct answer: Permit-required confined space
A permit-required confined space has one or more serious hazards (atmospheric, engulfment, entrapment) and requires a formal entry permit system.
Question 2: During an incident investigation, a safety specialist discovers that a worker was not trained on a new chemical introduced to the worksite. This is BEST classified as which type of cause?
- Immediate cause
- Contributing cause
- Root cause (Correct answer)
- Proximate cause
Correct answer: Root cause
A systemic failure such as lack of required training is a root cause—the underlying deficiency that allowed the hazardous condition to exist.
Question 3: What is the primary purpose of a 'change analysis' or 'Management of Change' (MOC) process in hazard recognition?
- Document past injuries related to equipment changes
- Identify new hazards introduced by process, equipment, or material changes before implementation (Correct answer)
- Train employees whenever new equipment arrives
- Ensure regulatory compliance for all equipment modifications
Correct answer: Identify new hazards introduced by process, equipment, or material changes before implementation
MOC systematically evaluates changes before they are implemented to identify and control new hazards they may introduce.
Question 4: Which ionizing radiation type has the GREATEST penetrating power and requires the most shielding?
- Alpha particles
- Beta particles
- Gamma rays (Correct answer)
- Neutron radiation
Correct answer: Gamma rays
Gamma rays are highly penetrating electromagnetic radiation requiring dense shielding such as lead or thick concrete to attenuate effectively.
Question 5: A safety specialist is assessing a warehouse where workers manually lift boxes weighing 50 lbs repeatedly throughout the day. Which NIOSH lifting equation component accounts for the horizontal distance of the hands from the body?
- Vertical multiplier (VM)
- Horizontal multiplier (HM) (Correct answer)
- Asymmetric multiplier (AM)
- Coupling multiplier (CM)
Correct answer: Horizontal multiplier (HM)
The horizontal multiplier (HM) in the NIOSH Revised Lifting Equation penalizes lifts where the load is held far from the body's midline.
Question 6: A facility stores flammable liquids in an inside storage room. OSHA requires that the room be constructed with what minimum fire resistance rating for the walls?
- 30 minutes
- 1 hour (Correct answer)
- 2 hours
- 4 hours
Correct answer: 1 hour
OSHA 29 CFR 1910.106 requires inside storage rooms for flammable and combustible liquids to have walls with at least a 1-hour fire resistance rating.
Question 7: Which hazard recognition technique uses the question 'What could go wrong if...?' to systematically evaluate potential failure scenarios?
- Fault Tree Analysis (FTA)
- What-If Analysis (Correct answer)
- Hazard and Operability Study (HAZOP)
- Layer of Protection Analysis (LOPA)
Correct answer: What-If Analysis
What-If Analysis uses open-ended 'what if' questions to brainstorm potential failure scenarios and their consequences.
COSS Hazard Recognition and Control 5
Which type of confined space requires a written permit, attendant, and trained entry supervisor before entry?