Chapter 9: Sample Collection and Identification

Weber, Hazardous Materials Technician Chapter 8: Detection and Air Monitoring Airborne concentrations of gases and vapors are measured in: (p.230) Percentage per million Points per million Parts per million Parts per mass The process of resetting an electronic air monitor and/or sample identification equipment to a known value is called: (p. 231) Bump checking Calibration Regulation Gradation A bump check should be conducted: (p.232 ) To determine if the instrument if functioning properly Before every use Along with a fresh air calibration All of above Prior to entering into an unknown atmosphere, in what order should we monitor for hazardous materials? (p.234 ) Oxygen, corrosive atmospheres, flammable atmospheres, toxic atmospheres, gamma, neutron, alpha, and beta radiation Oxygen, flammable atmospheres, corrosive atmospheres, toxic atmospheres, gamma, neutron, alpha, and beta radiation Gamma and neutron radiation from a distance, corrosive atmosphere, oxygen, flammable atmospheres, toxic atmospheres, alpha and beta radiation Gamma and neutron radiation from a distance, oxygen, corrosive atmosphere, flammable atmospheres, toxic atmospheres, alpha and beta radiation What is the maximum dose of radiation for emergency responders engaged in life safety? (p.239 ) 25 REM 10 REM 5 REM 2.5 REM Which of the following detection equipment is configured to measure alpha, beta, and gamma radiation? (p.238 ) Geiger–Mueller tubes (Geiger counters) Ionization detectors Neutron detectors Dosimeters Which of the following statements about pH paper is INCORRECT? (p.240 ) Used to detect corrosive materials Wetting the pH paper will decrease the sensitivity of the response, decreasing the response time of the paper Corrosives such as ammonia are more water-soluble and will respond better to wet pH paper Corrosives such as chlorine are less water-soluble and will respond better to dry pH paper All of the following statements about electrochemical sensors are considered advantageous EXCEPT: (p.242) Specificity Wide operational temperature range Cross-sensitivity to chemically similar compounds Low cost What is the proper guideline sequence when using oxygen sensors? (p.242 ) Inspect the instrument, check the last calibration date, fresh air zero the instrument, bump check the instrument, perform the measurement, and record the results Check the last calibration date, inspect the instrument, bump test the instrument, fresh air zero the instrument, perform the measurement, and record the results Check the last calibration date, fresh air zero the instrument, bump test the instrument, perform the measurement, record the results, and inspect the instrument Fresh air zero the instrument, bump test the instrument, inspect the instrument, check the last calibration date, perform the measurement, and record the results Which instrument is designed to detect flammable and combustible gases/vapors that are below the lower explosive limit and report their values as a percentage of a flammable vapor or gas in air? (p.243 ) Photo ionization detector (PID Combustible gas indicator (CGI) Ion mobility spectroscopy (IMS) Colorimetric tubes Which toxic chemical detection technology has the capability to detect oxygen, carbon monoxide, hydrogen sulfide, ammonia, arsine, chlorine, hydrogen chloride, hydrogen cyanide, hydrogen fluoride, phosgene, and sulfur dioxide? (p. 244) Photo ionization detector (PID) Ion mobility spectroscopy (IMS) Electrochemical sensors Flame ionization detector (FID) Which detection instrument is designed to detect a wide range of organic and inorganic gases/vapors in the low parts per million range? (p.246 ) Photo ionization detector (PID) Electrochemical sensors Combustible gas instrument (CGI) Ion mobility spectroscopy (IMS) A photo ionization detector utilizes what process for detecting toxic material? (p.247 ) Uses a radioactive isotope to ionize gases and vapors and then separates the ions by size and mobility in a drift tube. A signal is created that provides a unique pattern or signature that identifies the unknown material Ionization of the target gas using an ultraviolet lamp Uses a hydrogen flame to ionize gases and vapors Uses a color response to certain chemical or chemical families Which of the following statements about colorimetric tubes is INCORRECT? (p. 253) Colorimetric tubes indicate a color response to specific chemicals or chemical families Colorimetric tubes can detect more than 100 different chemicals Colorimetric tubes have a 99% accuracy to an indicated concentration Colorimetric tubes can measure in both parts per million range and percentage range The method for detecting mercury using a Lumex mercury detector relies on a process called: (p.259 ) Aromatic detection Ionization Weight classification Atomic absorption What type of detection instrument uses the process of using a hydrogen flame to ionize a gas sample to cause the emission of a unique wavelength of light to identify the presence of the specific nuclei within a specific chemical? (p.262 ) Flame photometric detector (FPD) Electrochemical detector Photo ionization detector (PID) Ion mobility spectroscopy (IMS) When determining the identity of a chemical, at least how many detectors should be used to avoid false positives? (p.263 ) Two detectors should be used as a redundancy measure Three detectors should be used when possible Four different types of detectors should be used One is sufficient providing that the detector was recently calibrated and fresh air zeroed prior to use The criteria for the selection of detection instrumentation at an emergency should include all the following EXCEPT: (p.263 ) Portability and ruggedness Ease of use and reliability Initial cost and annual maintenance cost Accuracy, selectivity, and intrinsic safety The National Electrical Code (NEC) based upon the NFPA standard defines the different flammable and combustible material into classes and groups. This information is used when making the decision on which type of detection equipment will be used. Combustible gases and vapors are defined as a: (p.264 ) Class I Class II Class III Class IV If you have a chemical that is measured on your colorimetric tube at 7%, how many parts per million (ppm) are present? (p.230 ) 7000 ppm 70,000 ppm 700 ppm 7,000,000 ppm Answer Key: 1. c 2. b 3. d 4. c 5. a 6. a 7. b 8. c 9. a 10. b 11. c 12. a 13. b 14. c 15. d 16. a 17. b 18. c 19. a 20. b Weber, Hazardous Materials Technician ©2013 by Education, Inc.