CWEA Study guides, Class notes & Summaries

CWEA Grade I Laboratory Analyst Exam 2024.

CWEA E1 Study Set with Questions and Answers Confined Space ANSWER A space that: -is large enough to enter and work. -has limited or restricted means for entry. -is not designed for continuous occupancy. Hot Work Permit ANSWER An employer's written authorization to perform work capable of providing a source of ignition. Inerting ANSWER A form of purging or ventilating a confined space where an inert gas (such as nitrogen, carbon dioxide or argon) is used to displace the atmosphere i...

CWEA Electrical and Instrument Grade 2 Study Guide with Questions and Answers What is PPE Category 1? ANSWER Arc-Rated clothing, Minimum Arc Rating of Arc 4 cal/cm2 arc-rated long sleeve shirt and pants or overall Parshall Flume Measurement point? 1.2 FT Water Height 20.8xH at measurement point ANSWER Possible answer:72,607 MGD Absoulte Pressure Gauge? What is True? ANSWER Possible answer: Read more accurate or 14.7 PSI higher Flow meter that uses electrodes is? ANSWER Magnetic Flo...

Legally responsible officals are required to report catagory 1 sanitary sewer overflows: Within two hours When testing a manhole for explosive gases when should the first test be made? Before removing the manhole cover When setting up to ventilate a manhole,the air inlet should be how many feet above street level? 2.0 feet Which chemical may be used for odor control in a sewer system? Hydrogen peroxide A category 2 is: Any sso which is not a category 1 Which tool would you use for...

Receiving job instruction and planning equipment use are part of: a. craft data. b. job preparation. c. work factors. d. leveled time. b. job preparation Anticipating other tasks or problems: a. usually creates additional problems. b. wastes time. c. sharply reduces the number of emergencies. d. often is not worth the effort. c sharply reduces the number of emergencies Making job planning a group effort: a. wastes time. b. improves productivity. c. causes confusion. d. All ...

In order to accurately estimate the flow of a sanitary sewer overflow (SSO) you must have: Spill start time, spill end time and spill rate Providing a plan and schedule to properly manage, operate and maintain all parts of the sanitary sewer system is the goal of a: A sewer system management plan (SSMP) What are the basics elements of a safety program? Safety policy, statement, safety training, accident investigation What factor must be considered when obtaining an easement for construc...

What does COLOR measure? Amount of color units (CU) in a sample. Color caused by natural metallic ions (Fe & Mg) & industrial wastes. What is the test summary for COLOR? Sample -> Tubes -> Compare to color standards over light source Which of the following techniques is used to isolate anionic surfactants (as MBAS) from the sample matrix? Extraction In the cyanide determination, which one of the following is not an interference? Halogenated aromatics Which of the following is n...

An industry operating an 8-hour shift, 5 days per week, generates 100,000 gallons of wastewater per shift. Their pretreatment system has a capacity of 150 gallons per minute. How long must the pretreatment facility operate to process the wastewater generated each day? 11.1 hours An industry has five sewer connections with the following discharge rates: 1) 300 gpd, 2) 75 gpd, 3) 725 gpd, 4) 1,200 gpd, 5) 200 gpd A flow-weighted composite sample of 5 liters is desired. How many milliliters of s...

If the potential difference across the coil is low, the coil will: A-draw too much current B-become too hot C-Produce too much magnetic force D-not heat up D-not heat up The NEC identifies environments that contain flammable vapors and gases as which class of hazardous location? A-Class I B-Class II C-Class III D-Class IV A-Class I Which of the following reduces high voltages and currents to save values for measurements? A-auto transformer B-megohmmeter C-instrument transforme...

Why are gasoline and volatile solvents objectionable when present in a sewer? They produce an explosion hazard You should never attempt to install, maintain, repair or replace electrical equipment panels, controls, wiring or circuits unless You know what you are doing, are qualified and are authorized What are the different areas of traffic zones? Advance Warning Area, Transition Area, Activity Area (buffer space and work space), Termination Area. Could be 4 or 5, justify your answer on th...