REHS EXAM- Residential and institutional Environmental Questions With Complete Solutions

Cross-connection controls include air gaps, backflow preventers, vacuum breakers and a. gate valves b. indirect waste piping c. air vents d. water meters correct answer: b. indirect waste piping A BSC national performance standard has been developed by a. NSF b. NSC c. NIH d. ABSA correct answer: a. NSF Biological safety cabinets should be performance tested every a. 1 year b. 1 month c. 2 years d. 10 years correct answer: a. 1 year The ASHRAE recommended minimal thermal standard for dwellings is ______ degrees F at 40% humidity and an air circulation rate of 45 fpm. a. 57 b. 60 c. 68 d. 76 correct answer: d. 76 Campylobacter (C. jejuni/C. coli, C. fetus subsp. fetus) may be safely used in the laboratory as a minimum at a. biosafety level 1 b. biosafety level 2 c. biosafety level 3 d. biosafety level 4 correct answer: b. biosafety level 2 Minimum wash water temperature in a hospital laundry is a. 146 to 150 degrees F b. 160 to 167 degrees F c. 170 to 178 degrees F d. 185 to 196 degrees F correct answer: b. 160 to 167 degrees F Universal precautions refer to a. specific respiratory protection used in hospitals