CIH Sample Questions and Answers 2023

CIH Sample Questions and Answers 2023 A mixture contains: 50 mL benzene (m.w.=78) v.p. = 75 mm, Hg sp. gr. = 0.879. 25 mL carbon tetrachloride (m.w. = 154), v.p. = 91 mm, Hg sp. gr. = 1.595 25 mL trichloroethylene (m.w. = 131.5), v.p. = 58 mm, Hg sp. gr. = 1.455. Assuming Raoult's Law is obeyed, what will be the concentration of benzene in air at 760 mm Hg saturated with vapor of the above mixture? 5.1% What is the ACGIH Threshold Limit Value for fluoride primarily intended to guard against Respiratory tract Irritation Under usual operating conditions, what is the static pressure at the discharge side of a fan 10' length of discharge duct? Greater than the atmospheric pressure 1000 cfm is to be drawn into a round, freely suspended duct of 6" diameter. What is the expected centerline velocity at 4" outside the duct opening? 765 fpm Workers in a brass foundry complain of a fever and general mailaise on Monday following a weekend respite from work. What should an IH be equipped to obtain upon arrival at the foundry? Air samples to measure exposure to zinc fumes What do the radioisotopes 238U, 40K, 226Ra and 235 U have in common? Each occurs in nature Why is stack sampling for particulate aerosols done in an isokinetic manner? To avoid size discrimination of collected particles Theoretically, what is the minimum number of sound pressure level measurements needed to determine the sound power output from a non-directional noise source in a free field? One What are too many levels of management, chronic and recurring internal problems, and numerous meetings attended by many people typically symptoms of? a flawed organizational structure Thoracic Fraction Lung airway and gas exchange region Respirable Fraction gas-exchange region Inhalable Fraction anywhere in respiratory Part of the human ear that converts air pressure waves into physical vibration Tympanic Membrane Fundamental characteristic of white light Multiple wavelength in the visible spectrum Biological agent most likely to cause serious brain damage Bacteria A workers deep core temp should be maintained 36 Celsius Passive dosimeter badges required a minimum face velocity of... 15 ft/min (OSHA) Bio half-life of water is 10 days. Employee ingests water containing trillium. When take urine sample to estimate amount of trillium. Within 10 days Exposure to result from electroplating operations Cyanide Exposure from operating a muller silica Exposure likely for a welding inspector Ionizing radiation (over metal fumes) At risk for developing Caisson's Deep sea diver