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NSM vol 2 ch 1
| Question | Answer |
|---|---|
| Which Safe Drinking Water Act regulation protects public health by limiting levels of contamination in drinking water? | National Primary Drinking Water Regulations |
| Why are drinking water regulations sometimes called interim regulations? | Research continues on drinking water contaminants |
| Which contaminants make up the Contaminant Candidate List (CCL)? | Contaminants not regulated by the National Primary Drinking Water Regulations |
| What does the Unregulated Contaminant Monitoring Regulation provide the EPA? | Scientifically valid data on unregulated contaminants in drinking water |
| Why are primary standards or MCLs enforceable by law? | These cover substances that are of health concern. |
| Where is arsenic found naturally? | Foods, tobacco, shellfish and drinking water |
| What is the main source of chlorite in drinking water? | Chlorine dioxide used for disinfection |
| Why is nitrite regulated? | To prevent methemoblobinemia |
| What are some uses of synthetic organic chemicals (SOC's)? | Pesticides, paints and food additives. |
| Among the VOCs found in groundwater, which are encountered most frequently and in the highest concentrations? | 1,1,1-Tricholoroethane and trichloroethylene |
| Which waterborne diseases have been traced to improperly disinfected drinking water? | Typhoid, cholera and dysentery |
| The final RTCR requires ------ to notify the public if a test exceeds the -------- for E. coli in drinking water. | Public water systems; MCL |
| How do the Surface Water Treatment Rules define surface water? | All water open to the atmosphere and subject to surface runoff |
| What is the major reason that turbidity is undesirable? | It causes health hazards |
| What is a CT value? | The residual concentration of a given disinfectant in mg/L times the disinfectant's contact time in minutes |
| Calculate the effluent concentration if the influent concentration is 100 mg/L and the removal efficiency is 95% | 5 mg/L |
| Calculate the log removal value (LRV) if the influent concentration is 90 mg/L and the effluent concentration is 1.2 mg/L. | 1.88 |
| The major provisions of the LT1ESWTR include the control of ---- and ------- turbidity performance standards. | cryptosporidium; combined filter effluent (CFE) |
| What do the routine monitoring requirements of the Stage 1 DBPR include? | TTHM/HAA5 and chlorite |
| What is the new MCL for uranium established by the final Radionuclides Rule? | 30 ug/L |
| What has caused a significant increase in environmental aluminum exposure? | acid rain |
| What is skeletal fluorosis? | A disease where bones become brittle. |
| What is the one objective of a safety program? | preventing harm |
| How can an operator accept responsibility for an active role in the safety program? | Being aware of the utility's safety policies and conforming to established regulations. |
| What is the best way to deal with accidents or safety incidents? | Keep them from happening in the first place. |
| What are important considerations when using self contained breathing equipment? | Maintenance and training |
| What is the main, easiest way to identify a confined space? | Whether or not an operator can enter while standing upright. |
| What is the only reliable method of detecting hydrogen sulfide in the air? | Atmospheric monitoring |
| When can wearing gloves be a hazard? | When working around machinery that is revolving or has moving parts. |
| What are hearing protection devices given to evaluate their effectiveness? | Noise reduction rating (NRR). |
| To provide adequate protection, what should the noise reduction rating (NRR) of the hearing protection device be? | 85 dB or less. |
| Why are cold weather conditions an added hazard when working around water? | The thermal shock of cold water can paralyze muscles, making it hard or impossible to save oneself. |
| What should you base a safe stopping distance behind the vehicle in front of you on? | The road, traffic and weather conditions. |
| Which skin condition has more resistance to electrical current flow? | Dry skin |
| Why is electrical power entering a water treatment facility usually routed through transformers? | To reduce the voltage |
| Even after equipment is locked out and tagged, why might it still be unsafe to repair? | Stored energy in gas, electricity, air, water, steam and hydraulic systems. |
| What can greatly reduce fire hazards? | The prompt disposal of common fire hazards, a wastepaper collection system and debris removal. |
| What fires require a Class D fire extinguisher? | Combustible metals such as magnesium, sodium, zinc and potassium. |
| What is a safety data sheet used for? | Chemical management |
| What is another name for hydrochloric acid (HCL)? | Muriatic acid |
| Where in the treatment plant is nitric acid most commonly used? | To clean the equipment |
| What is the function of bases in a treatment plant? | To slow chemical reactions |
| What is the result of overexposure to hypochlorite compounds? | Severe burns |
| What are the potential hazards when handling activated carbon? | Dust and fire |
| What is glassy phosphate? | Small broken glass-like particles of sodium polymetaphosphate. |
Created by:
sgaskell