Exam (elaborations)
CIH Prep Questions and Answers 2024
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Exam of 10 pages for the course CIH at CIH (CIH Prep)
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CIH PrepMist/Fog particle size - answer5-100 um
Smoke particle size - answerless than 1 um
Fume particle size - answerless than 1 um (tend to agglomerate into clusters)
Breathing Zone - answer NEW - hemisphere forward of Sholders with a radius of 6-9"
OLD - 2' diameter sphere centered on head
Systematic Error - answer Correctable error - malfunction of sampler, instrument, or
operator - affects accuracy (not precision)
Random Error - answer Unknown/uncontrollable error - random fluctuations of
equipment/procedure - affects precision
Activated Charcoal - answer organic vapors
Silica Gel - answer polar and high-boiling organics/inorganics
Porous Polymers (XAD, Tenax) - answer organic vapors
Molecular Sieves, Alumina Gel - answer polar vapors
Adsorption - answer one substance just hangs onto the outside of another. Think of
people holding onto a car trolley with one hand and leaning off the side
Absorption - answer one substance enters completely into another. Think of people
walking into and sitting down in a car trolley.
Solvent Desorption Efficiency (NIOSH) - answer greater than 75%
Spectrophotometers - answerIR - MIRAN, simple organic vapor mixtures, FTIR
UV - Hg detetor
Vis - Halide meter (halogen compounds)
Ionization Detectors - answerFID - (flame) general hydrocarbon
PID - (photo) sensitive for aromatic HC, 9-12 eV
Catalytic Combustion - answerLEL meter - heated wire - percent level detection - needs
O2
, Electrochemical Cells - answergood for reactive inorganics (O2, O3, NOx, SO2, CO)
Flame Photometric Detectors - answergood for sulfur containing compounds
Gas Chromatography - answeruses various detectors - FID, PID, FPD, ECD (electron
capture - chlorinated or brominated organics)
Nitrous Oxide - answerTedlar Bag, Portable IR
Benzene - answerTedlar bag, GC-PID
Vinyl Chloride - answerCharcoal tube
Ketones - answerCharcoal tube
Aromatic Hydrocarbons - answerCharcoal tube (PID)
Aromatic Amines - answerSilica Gel tube
Methylcyclohexanone - answerPorapak Q (porous polymer/bonded phases)
Mercury - answersilvered Chromosorb P (impregnated filter/solid)
Formaldehyde - answer2-(benzylamino) ethanol on Chromosorb 102 (impregnated
filter/solid)
Phenol - answerimpinger/bubbler (NAOH)
Acetic anhydride - answerimpinger/bubbler (hydroxylamine)
Formaldehyde - answerimpinger/bubbler (sodium bisulfite)
Hydrogen Cyanide - answerimpinger/bubbler (KOH)
Nitrogen dioxide - answerpassive monitor (triethanolamine)
Ammonia - answerpassive monitor (sulfuric acid)
Allergic Contact Dermatitis - answerCr, Ni, epoxy resin, amines, isocyanates, biologicals
Hematotoxicology (blood) - answerbenzene, naphthalene, organochlorine insecticides,
arsine, phosphene, nitrates, nitrites, aromatic amines, nitro-compounds, chlorate salts
Carboxyhemoglobinemia - answerCO, methylene chloride, smoking
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