Flashcard · Mathematical Calculations
Total recordable incidence rate formula?
Recordable cases x 200,000 / hours worked.
Safety math: incidence rate
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- Total recordable incidence rate formula?
- Recordable cases x 200,000 / hours worked.Safety math: incidence rate
- What does the 200,000-hour base represent?
- 100 full-time workers x 40 hours a week x 50 weeks.Safety math: incidence rate
- What goes in the DART rate numerator?
- Cases with days away, restricted work or job transfer. Count cases, not days.Safety math: DART rate
- Severity rate counts what?
- Days lost or charged x 200,000 / hours worked.Safety math: severity rate
- Allowed hours at level L with a 90 dBA criterion and 5 dB exchange?
- T = 8 / 2^((L - 90) / 5). 95 dBA allows 4 h; 100 dBA allows 2 h.OSHA 29 CFR 1926.52, Table D-2
- Noise dose formula?
- D = 100 x sum of (time at each level / allowed time at that level), in percent.Noise dose (general acoustics)
- Two equal noise sources combine to how much more?
- About 3 dB more than one alone. Ten equal sources add 10 dB.Decibel addition (general acoustics)
- Point source in open air: level change when distance doubles?
- Falls about 6 dB.General acoustics
- Fall clearance stack, measured from the anchor?
- Free fall + deceleration + harness stretch + D-ring to feet + safety margin.Fall clearance (method)
- NIOSH lifting equation load constant (US units)?
- 51 lb. RWL = 51 x HM x VM x DM x AM x FM x CM.NIOSH lifting equation
- Lifting index formula and meaning above 1.0?
- LI = load / RWL. Above 1.0, more workers are at risk; redesign by priority.NIOSH lifting equation
- Flow through a duct?
- Q (cfm) = V (fpm) x A (sq ft).Ventilation (general principle)