A safety technician measures a chemical concentration of 250 ppm. What does "ppm" stand for?
Ohst Math Science Business
Question · Easy
How deep before you need a trench box?
Short
A company experiences 4 recordable injuries in a quarter with 250,000 total hours worked. What is the Total Recordable Incident Rate (TRIR)?
Question · Medium
OSHA's injury figure that adds Columns H, I, and J on Form 300 or 300A.
Math and statistics
Guess the Term
Chapter 1: Exam Overview & Prep Strategy
1.1 OHST Exam Logistics, Blueprint & Scoring
Study guide
What is the primary difference between an acute exposure and a chronic exposure to a hazardous substance?
Read the clue and guess the term in 6 tries.
Game
A facility has direct costs of $50,000 from an accident and indirect costs estimated at 4 times the direct costs. Using the standard indirect cost multiplier, what are the total accident costs?
OSHA reports recordable injury rates per 100 of this staffing unit.
In the context of Process Safety Management (PSM), what is the significance of the lower flammability limit (LFL)?
Question · Hard
Day 1 vs 1 year later
According to the hierarchy of controls, which control method is generally considered most effective?
Ohst Safety Programs Risk
OSHA's Hazard Communication Standard now follows this UN scheme for warning symbols and hazard statements.
Compliance programs
1.2 Study Strategy & Test-Taking Tactics
What is the primary purpose of a Job Hazard Analysis (JHA)?
Swap tiles to line up three of the same term.
Term Match
Under the Globally Harmonized System (GHS) of Classification and Labeling of Chemicals, what information is required on a chemical label?
The 16-section document that a chemical maker must provide for each hazardous product.
During an incident investigation, which approach focuses on identifying system failures rather than assigning blame to individuals?
What the hep B vaccine costs you at work
What is the primary goal of behavior-based safety (BBS) programs?
Federal body whose mission includes clean air, clean water and cleanup of contaminated land.
Chapter 2: Hazard Identification, Risk Assessment & Incident Investigation
2.1 Job Safety Analysis (JSA) & Hazard Recognition
What does the ISO 45001 standard specify?
Flip two cards at a time to find matching terms.
Term Pairs
In the context of risk management, what does "residual risk" refer to?
A study under OSHA's rule for highly dangerous chemicals that asks what could go wrong and which safeguards prevent releases.
What is the purpose of a safety audit?
Never enter a tank before testing the air
What is the primary purpose of the Plan-Do-Check-Act (PDCA) cycle in safety management?
Gear worn by a worker to reduce contact with a hazard that can cause serious injury or illness.
Hazard identification and control
2.2 Risk Assessment Frameworks & Risk Matrix Calculations
Under RCRA (Resource Conservation and Recovery Act), which characteristic is NOT considered a hazardous waste characteristic?
Find five hidden terms in a grid of letters.
Term Search
What is the minimum safe distance required for non-essential personnel during hot work operations near flammable materials?
Ohst Hazard Identification
OSHA's 1910.147 practice that controls hazardous energy during servicing and maintenance of machines.
What is the primary purpose of a fire watch during hot work operations?
OSHA noise limits
According to OSHA, what is the maximum depth of a trench that requires a protective system (shoring, sloping, or trench box)?
Under OSHA construction rules, fast-acting breaker that cuts power when current returning from a tool differs from current going to it by about 5 milliamperes.
2.3 Workplace Inspections & Safety Audits
What is the minimum approach distance for unqualified personnel from exposed energized electrical parts operating at 300V?
What does "lockout/tagout" (LOTO) primarily protect against?
Equipment required on an agricultural tractor by 29 CFR 1928.51 that works with the seatbelt to keep the operator inside a safe zone.
What is the primary purpose of machine guarding?
Lockout/tagout, called like a cup final
At what height is fall protection required in general industry?
OSHA's legally enforceable airborne concentration for a chemical, usually averaged over an 8-hour shift.
Industrial hygiene
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