CIH - TLV/BEI Book Questions with solutions 2023

CIH - TLV/BEI Book Questions with solutions 2023 Threshold Limit Value Refers to airborne concentrations of chemical substances and represent conditions under which it is believed that nearly all workers may be repeatedly exposed, day after day, over a working lifetime, without adverse health effects TLV-TWA The TWA concentration for an 8-hour workday and 40-hour workweek, to which it is believed that nearly all workers may be repeatedly exposed, day after day, over a working lifetime without adverse effect TLV-STEL - 15 minute TWA that should not be exceeded at any time during a workday, even if the 8-hour TWA is within the TLV-TWA. Continuous exposure concentration without: o Irritation o Chronic or irreversible tissue damage o Dose-rate-dependent toxic effects o Narcosis of sufficient degree to increase likelihood of accidental injury TLV-C (threshold limit value-ceiling) Concentration that should not be exceeded during any part of the working exposure 3/5 rule Applies to TLV-TWAs that do not have a TLV-STEL. Exposures may exceed 3x the TWA for no more than 15 mins at a time, on no more than 4 occasions spaced 1 hour apart Aerosol Suspension of solid particles or liquid droplets in a gaseous medium Nanomaterials Objects 100nm or smaller in one or more dimension 5 times the value of TWA Under the 3/5 rule, an exposure above the TWA cannot exceed __ times the value of the TWA TLV-C The best TLV for fast-acting chemicals and short sampling time. Dust, mist, fume, fog, fiber, smoke, smog Name the 7 types of aerosols Brief and Scala Model Refers to unusual work schedules. The model reduces the TLV proportionately for increased exposure time and reduced non-exposure time. It is generally intended to apply to work schedules longer than 8 hours/day or 40 hours/week. Tier 1 On the ACGIH Under Study list, chemicals/physical agents which may move forward as Notice of Intended Change or Notice of Intent to Establish will fall in what tier? Tier 2 On the ACGIH Under Study list, chemicals/physical agents which will not move forward but will remain on or be removed from the Under Study list for the next year will fall in what tier? Confirmed human carcinogen Carcinogenicity group A1 145dB 1/3 octave band levels for frequencies 1-80Hz should not exceed sound pressure level (SPL) ceiling limit of ___dB 50-60hz Low frequency sound in chest resonance range form ___-___ hz can cause whole-body vibration CO, lead, manganese, styrene, toluene, xylene Name the 6 common ototoxins 140dB For impulsive and impact noise, there are no permitted exposures of unprotected ears in excess of a c-weighted sound pressure level of ___dB Photokeratitis Sunburn of the cornea Rheumatoid arthritis, endocrinological disorders, acute trauma, age, gender, pregnancy, level of physical condition, etc. Non-occupational factors for work-related musculoskeletal disorders Particles Not Otherwise Specified These particles are classified by ACGIH as biologically inert and insoluble (or partially soluble) TLV Basis The adverse effect(s) upon which the TLV is based