CHMM Final Exam Questions With 100% Correct Answers | Latest Update Graded A+ (2023/2024)

CHMM Final Exam Questions With 100% Correct Answers | Latest Update Graded A+ (2023/2024). Cobalt-60 has a 5 year half life. If the initial activity of a Cobalt-60 source is 20 mCi, what is the activity after 10 years in mCi? a. 5 b. 0 c. 2 d. 10 - Answer a. 5 The exposure rate at a distance of 1 foot from a radioactive source is 20 rnR/hr. What is the exposure rate in mR/hr. at 10 feet? a. 0.1 b. 0.2 c. 0.3 d. 0.4 - Answer b. 0.2 Which of the following is not regulated by EPA as an environmentally toxic metal? a. arsenic b. lead c. cadmium d. iron - Answer d. iron Which of the following chemicals is heavier than air? Chemical Name Vapor Density a. Methane 0.55 b. Carbon Monoxide 0.97 c. Nitrogen 0.97 d. Propane 1.52 - Answer d. Propane 1.52 Which federal statute regulates both stationary and mobile pollutant sources? a. TSCA b. CAA c. CWA d. SDWA - Answer b. CAA (Clean Air Act) In mg/m3, what is equivalent to 100 ppm for a gas with a molecular weight of 24.45? a. 1 b. 10 c. 100 d. 1000 - Answer c. 100 RCRA characteristic wastes are: a. corrosive only b. reactive and ignitable only c. ignitable and corrosive only d. toxic, ignitable, reactive or corrosive - Answer d. toxic, ignitable, reactive or corrosive A UST is defined as "any one or combination of tanks which is used to contain an accumulation of regulated substances, and the volume of which including the volume of underground pipes connected thereto is": a. Twenty percent or more beneath the surface of the ground b. One hundred percent beneath the surface of the ground c. Fifty percent or more beneath the surface of the ground d. Ten percent or more beneath the surface of the ground - Answer d. Ten percent or more beneath the surface of the ground For a 40-hour work week, TLV is: a. the airborne concentration of a substance with specified conditions under which it is believed that nearly all workers may be exposed day after day without adverse effects b. the airborne concentration of a substance set by OSHA as an enforceable standard which may not be exceeded c. the lowest dose of a substance introduced by any route other than inhalation, over a given period of time, and reported to produce any toxic effect in humans or carcinogenic, neoplastigenic, or teratogenic effects in animals or humans d. is the dose of a material at which 50 percent of test animals die. - Answer a. the airborne concentration of a substance with specified conditions under which it is believed that nearly all workers may be exposed day after day without adverse effects CHMM Practice Exam(CHMM)Questions And Answers 2023 What should be done if the large quantity generator does not receive a final copy of the manifest from the disposal facility? a. nothing, the generator is not responsible b. change disposal facilities c. contact the disposer within 35 days after shipping & file within 45 days d. none of the above - Answer c. contact the disposer within 35 days after shipping & file within 45 days RCRA solid waste definition doesn't include: