A boiling liquid expanding vapor explosion (BLEVE) is caused by: (147)A. sublimation of a boiling liquid.B. application of a pressure stream.C. a heated liquid or gas expanding.D. inadequate internal vessel pressureCGases with a vapor density of _____ will rise quickly and spread to a wide geographical area. (148)A. oneB. less than oneC. more than oneD. one through fiveBWhere are you MOST likely to find gases or vapors with vapor density greater than one? (149)A. AtticsB. TrenchesC. Near the ceilingD. Flat open spacesBPartially water-soluble chemicals will penetrate into the lower respiratory system and cause: (149)A. sudden gastrointestinal distress.B. itching, scratching, and bloody skin lesions.C. immediate symptoms such as coughing and throat irritations.D. delayed symptoms that include pulmonary edema and coughing up bloodDMost flammable liquids will float on water because they have: (151)A. high solubility.B. high miscibility.C. specific gravities less than one.D. specific gravities greater than oneCViscosity determines the ease with which a product will flow and is greatly affected by: (152)A. sublimation.B. temperature.C. specific gravity.D. appearance and odorBThe concentration (in air) at which the “average person” can smell a particular compound is the: (154)A. solubility.B. vapor density.C. odor threshold.D. vapor pressureCThe way a substance behaves and interacts at the molecular level are: (154)A. physical properties.B. chemical properties.C. biological properties.D. radiologic propertiesBFlash point, autoignition temperature, and flammable range are properties related to a material’s: (154)A. reactivity.B. corrosivity.C. flammability.D. radioactivityCThe temperature at which a liquid or volatile substance gives off enough vapors to support continuous burning is its: (154)A. fire point.B. flash point.C. flammable range.D. autoignition temperatureAFlammable gases have: (154)A. no flash point.B. higher fire points.C. very low flash points.D. no autoignition temperatureAThe lowest concentration (or lowest percentage of the substance in the air) that will produce a flash of fire when an ignition source is present is the: (156)A. LLL (lower liability limit).B. LFL (lower flammable limit).C. UEL (upper explosive limit).D. UFL (upper flammable limit)BA fuel that has moved beyond its upper flammable limit will: (156)A. be too rich to burn.B. flash if exposed to an ignition source.C. immediately reach its autoignition temperature.D. reach the correct ratio of fuel to oxygen to sustain combustionAThe chemical property used to describe substances that destroy living tissue is: (157)A. reactivity.B. corrosivity.C. flammability.D. radioactivityBWhat type of materials break down fatty skin tissues and can penetrate deeply into the body? (157)A. AcidsB. BasesC. GasesD. VaporsBThe reactivity triangle has three components: an oxidizing agent, a reducing agent, and a(an): (159)A. solubility.B. flash point.C. reactivity point.D. activation energy
DThe reducing agent in the fire tetrahedron acts as the _____ source for the reaction. (159)A. fuelB. oxygenC. activationD. autoignitionAWhat will increase the rate of polymerization and decrease the activation energy necessary for further polymerization? (161)A. FuelB. CatalystC. InhibitorD. ContaminationBThe most energetic and hazardous forms of radiation are: (163)A. ionizing.B. nonionizing.C. visible light.D. electromagneticAWhich type of radiation can be reduced or stopped by a layer of clothing, a thin sheet of metal, or a thick Plexiglass? (165)A. AlphaB. BetaC. GammaD. NeutronBWhich type of ionizing radiation consists of high-energy photons? (165)A. AlphaB. BetaC. GammaD. NeutronCWhich of the following statements about radiation is MOST accurate? (166)A. Exposure to radiation will make a person radioactive.B. Exposure to any amount of radiation will cause radiation sickness.C. Radioactive contamination occurs when radiation passes through people or things.D. Damage is often described in terms of dosage, indicating the amount of energy absorbed by matterDThe damaging effects of ionizing radiation occur at the _____ level. (167)A. organB. cellularC. externalD. environmentalBWhich of the following statements about radiation dose is MOST accurate? (167)A. Lethal doses of radiation are commonly encountered.B. Exposure to radiation received in a short period of time is a chronic dose.C. Small amounts of radiation received over a long period of time is a chronic dose.D. The body is better equipped to handle an acute dose of radiation than a chronic doseCWhich of the following statements about radiation dose is MOST accurate? (167)A. Lethal doses of radiation are commonly encountered.B. Exposure to radiation received in a short period of time is a chronic dose.C. Small amounts of radiation received over a long period of time is a chronic dose.D. The body is better equipped to handle an acute dose of radiation than a chronic doseAAsphyxiants, irritants, convulsants, and carcinogens are types of: (172-173)A. toxics.B. radiation.C. polymers.D. corrosivesAWhich type of biological/etiological hazard spreads mostly through the bite of infected arthropods? (176)A. VirusesB. BacteriaC. RickettsiasD. Biological toxinsCMost diseases are spread via contact with: (177)A. toxicity.B. rickettsias.C. body fluids.D. radioactive substancesCWhich class of hazards is characterized by thermal and mechanical hazards in the form of blast pressure waves, shrapnel and fragmentation, and incendiary thermal effects? (179-181)A. Class 1B. Class 2C. Class 3D. ClassACryogens and their accompanying cold hazards belong to which hazard class? (182)A. 1.2B. 2.1C. 2.2D. 3.2CMost hazmat incidents, such as gasoline and diesel fuel spills, involve which type of hazard class? (183)A. Class 3B. Class 4C. Class 5D. Class 6AIn addition to burning, all flammable and combustible liquids exhibit varying degrees of: (183)A. toxicity.B. infectivity.C. corrosivity.D. fragmentationA“Spontaneously Combustible Materials” and “Dangerous When Wet” are divisions of which hazard class? (186)A. Class 3B. Class 4C. Class 5D. Class 6BWhich statement about oxidizers is MOST accurate? (189)A. They cannot burn without air being present.B. They vigorously support combustion and may be explosive.C. They may produce hydrogen gas when in contact with metal.D. Although they support combustion, they are not an explosive hazardsBOrganic peroxides are both an oxidizer and a fuel, making them very: (189)A. stable.B. reactive.C. corrosive.D. radioactiveBPoisonous materials are known to be _____ to humans. (192)A. toxicB. corrosiveC. infectiousD. not dangerousABiohazards such as infectious substances are part of which hazardous class? (192)A. Class 3B. Class 4C. Class 5D. Class 6DClass 7 placards may come in white or yellow, and they bear the unique trefoil symbol for: (194)A. radiation.B. explosives.C. infectious diseases or biohazards.D. oxidizing substances or organic peroxidesAClass 8 hazards are either a liquid or solid that cause full thickness destruction of human skin at the site of contact because they are: (196)A. toxic.B. explosive.C. corrosive.D. radioactiveCMiscellaneous hazardous materials such as elevated temperature material or marine pollutants go in what Hazard Class? (198)A. Class 6B. Class 7C. Class 8D. Class 9DWhich statement about gathering information during a hazmat incident is MOST accurate? (199)A. Shipping papers are the last resort in a hazmat incident.B. First responders should use a variety of sources to gather information.C. The ERG should contain all the information that a first responder needs.D. At a highway incident, the driver of the vehicle will have the most up-to-date informationBOverhead power lines, highway traffic, and rail lines are examples of: (200)A. unavoidable risks.B. variables to eliminate.C. potential site hazards.D. potential ignition sourcesCStatic electricity, internal combustion engines, and heated surfaces are examples of: (200)A. unavoidable risks.B. variables to eliminate.C. potential site hazards.D. potential ignition sourcesDWhen is topography a factor in hazmat incidents? (203)A. In both rural and developed environmentsB. Only if there are very tall buildings nearbyC. Topography is not a factor in hazmat incidentsD. Only if the incident is near a state or federal park or preserveAWhich service will an emergency response center provide for first responders? (204)A. Establish a command structure.B. Notify local emergency services.C. Deploy the shipper or manufacturer to the site.D. Provide immediate technical assistance to the callerDWhich type of biological hazard spreads mostly through the bite of infected arthropods?Arboviral disease is a general term used to describe infections caused by a group of viruses spread to people by the bite of infected arthropods (insects) such as mosquitoes and ticks. These infections usually occur during warm weather months, when mosquitoes and ticks are active.
Which type of radiation can be reduced or stopped by a layer of clothing a thin sheet of metal?Beta Particles
They travel farther in air than alpha particles, but can be stopped by a layer of clothing or by a thin layer of a substance such as aluminum. Some beta particles are capable of penetrating the skin and causing damage such as skin burns.
What type of radiation can be reduced or stopped by a layer of clothing a thin sheet of metal or a thick plexiglass?Beta particles travel appreciable distances in air, but can be reduced or stopped by a layer of clothing or by a few millimeters of a substance such as aluminum. Gamma radiation Like visible light and x rays, gamma rays can be considered as a stream of photons.
How many hazard classes are there?The DOT separates hazardous materials into nine different categories or “hazard classes.” They are defined by specific hazardous properties and have distinct regulatory requirements for packaging, markings, and labels.
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Cryogens and their accompanying cold hazards belong to which hazard class?
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