Ambient air - Study guides, Class notes & Summaries

EPA 608 CORE Exam Questions and Answers (2022/2023) (Verified Answers) Graded A+ What characteristic or characteristics of CFCs make them more likely than other chlorine compounds to reach the stratosphere? Dont disolve iin water Each chlorine atom in the stratosphere can destroy how many ozone molecules? 100,000 ozone molecules Which refrigerant contains a CFC? R500, R12, R113 or R11? Theyre all CFC's HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? Hydrogen, chlorine, flouri...

Polyethylene What is the most often used material for potable water system tanks? 1. Copper Alloys (incl. bronze, brass and nickel-copper) 2. AISI Type 300 series stainless steel 3. Glass-lined metal 4. FDA approved plastic 5. FDA approved rubber Name 5 materials allowable for contact use in potable water systems: Siphon Break What device can be used to separate potable water from other water systems? Accumulator Tank, after pump/filter and before check-valve What is the device used t...

A Calibration procedure calls for checking a chemical cell oxygen analyzer daily. The range of the analyzer is 0 to 1000 PPM, and the procedure states that ambient air be used for the check. The chemical cell costs $350 and has a rated six months life. Cells are being replaced monthly.You Should: - A. Try to find a supplier of the sensor cells that is not as expensive. B. recommend a different type analyzer be used. C. recommend that a calibration system be installed using a 1000 PPM calibr...

IICRC WRT Test 2024 #1. During the inspection process, restorers shall make a reasonable effort to - Answer ️️ -C. identify and address potential safety hazards #2. A significant amount of water absorption and evaporation load where wet porous materials represent ~5% to ~40% of combined ceiling, walls, and flooring surface areas and where low evaporation materials and assemblies are minimally wet is - Answer ️️ -B. class 2 #3. Multiple extraction of salvageable materials, especiall...

MD Stationary Engineer Practice Questions and Answers Latest Updated 2024/2025 (100% Correct) Gases of Combustion that cool on Contact with the boiler heating Surface before combushion is completed Cause a(n) _________ - Answer Formation of soot and smoke In the event of a flame failure, the programmer will______ - Answer Secure the fuel, purge the firebox, and then shut down Boil the water must be conditioned to prevent ______ (3 Answers) - Answer Formation of scale, oxygen pitting, carry...

IFSTA 7 Question Bank with Complete Questions & Answers 100% Verified IFSTA 7 Question Bank with Complete Questions & Answers 100% Verified IFSTA 7 Question Bank with Complete Questions & Answers 100% Verified IFSTA 7 Question Bank with Complete Questions & Answers 100% Verified Which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood, leading to hypoxia of the brain and tissues? A) Carbon dioxide (CO2) B) Carbon monoxide (CO) C) Aerosolized fuel particle...

What are restrictions placed on a First Officer correct answer: Captain Will: Make all takeoffs when the weather is below Cat I IFR landing minimums. Make all takeoffs and landings on runways that are shorter than 4,500 feet. Make all takeoff and landings when Breaking action is reported Runway Condition Code 2 or less (Poor or Nil). Make all takeoff and landings when he/she determines that conditions dictate. First Officers with Less Than 100 Hours correct answer: The Captain s...

Absolute Temperature. CORRECT ANSWER A temperature measured in Kelvins (K) or Rankines (R). Accelerant. CORRECT ANSWER A fuel or oxidizer, often an ignitable liquid, intentionally used to initiate a fire or increase the rate of growth or spread of fire. Accident. CORRECT ANSWER An unplanned event that interrupts an activity and sometimes causes injury or damage or a chance occurrence arising from unknown causes; an unexpected happening due to carelessness, ignorance, and the like. Ambie...

Acceptable Risk The average rate of loss that is considered tolerable for a given activity. Accident An unplanned event or sequence of events that results in an undesirable consequence. An occurrence where property damage, material loss, detrimental environmental impact or human injury occurs. Accidental Release An unanticipated emission of a regulated substance or other extremely hazardous substance into the ambient air. Action Items A column in the What-If/Checklist Wo...

NFPA 10 Exam 71 Questions with Verified Answers When should wheeled fire extinguishers be considered? - CORRECT ANSWER • High hazard areas are present. • Limited available personnel are present. Requiring: High agent flow rate, Increased agent stream range, increased agent capacity NON-DOT low pressure fire extinguisher cylinders that pass a hydrostatic test shall have the following recorded on a label: - CORRECT ANSWER • Month and year test was performed (perforated) • Test pre...