per obra 1987 a facility must have a RN on duty at least ____ per week {Ans: 8 hours a day, 7 days a week}a nurse aide certification is valid for how long? {Ans: 4. indefinitely}An abnormal condition or disorder caused by exposure (inhalation, absorption, ingestion, or direct contact) to environmental factors associated with employment is: 1. An occupational injury 2. a musculaskeletal disorder (MDS) 3. a violation of the hazardous communication standard (HCS) 4. An occupational illness {Ans: 4. That is the definition of occupational illness. An occupational injury is a cut, fracture, sprain or amputation that results from a work accident and requires more than basic first aid}______ hazardous chemicals are ones in which an acute or chronic health effect may occur to exposed employees or residents 1. Physical 2. Nosocomial 3 MSDS 4. Health {Ans: 4. Health hazardous chemical may result in a health issue due to exposure or extended exposure. Physical chemicals are those that are combustible. MSDS are the guidelines that must be followed by manufacturers to ensure protection of persons using hazardous chemicals}In the typical facility, staff turnover is greatest among: 1. Business office 2. CNAs 3. Dietary workers 4.