Safety and Regulations Flashcards
7 cards from real WTO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety and Regulations flashcards as text
Which type of respirator provides the highest level of respiratory protection for water treatment operators responding to a major chemical release?
Answer: Self-Contained Breathing Apparatus (SCBA)
An SCBA supplies its own clean air and provides the highest level of respiratory protection, required for immediately dangerous to life or health (IDLH) atmospheres.
What is the primary purpose of secondary containment around chemical storage tanks at a water treatment facility?
Answer: To prevent chemical spills from reaching the environment or water supply
Secondary containment systems are designed to capture spills or leaks from primary storage, preventing hazardous chemicals from contaminating groundwater, surface water, or the treatment process.
A water treatment operator must use ammonia and chlorine in the same work area. What serious hazard does this combination present?
Answer: Formation of chloramines, which are toxic to inhale
Mixing chlorine and ammonia produces chloramines, toxic compounds that can cause severe respiratory irritation and chemical pneumonia if inhaled.
According to EPA regulations, how often must operators of a community water system serving more than 10,000 people report monthly monitoring results for disinfection byproducts?
Answer: Within 10 days after the end of each month
EPA's Stage 2 Disinfectants and Disinfection Byproducts Rule requires large community water systems to report monitoring data to the primacy agency within 10 days after the end of the monitoring period.
What does 'immediately dangerous to life or health' (IDLH) concentration mean in the context of chemical safety at a water plant?
Answer: The concentration that poses an immediate threat of death or irreversible health effects within 30 minutes of exposure
IDLH is defined by NIOSH as the maximum airborne concentration of a substance from which a worker could escape within 30 minutes without experiencing escape-impairing or irreversible health effects.
Which regulation requires water treatment facilities to develop and maintain an Emergency Response Plan (ERP)?
Answer: Public Health Security and Bioterrorism Preparedness and Response Act (Bioterrorism Act)
The 2002 Bioterrorism Act requires community water systems serving more than 3,300 people to conduct a vulnerability assessment and develop an Emergency Response Plan.
When storing compressed chlorine gas cylinders at a water treatment plant, which safety practice is required?
Answer: Secure cylinders upright with chains or straps to prevent tipping
Compressed gas cylinders must be stored upright and secured with restraints such as chains or straps to prevent them from tipping and damaging the valve, which could cause a catastrophic release.