Browse all practice questions for the California Registered Environmental Health Specialist (REHS) Disaster Management Practice Test. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

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  • For radiation exposure, if distance is doubled, exposure is reduced by what factor?
  • A rem stands for which term?
  • The rem is used to compare biological effects of different radiations on humans.
  • In pet and people sheltering plans, what is a common requirement to minimize conflicts between spaces?
  • Define shelter-in-place and provide a scenario when it is preferred over evacuation.
  • Which of the following can stop a beta particle?
  • Which of the following lists all the forms of ionizing radiation?
  • Which description correctly outlines PPE Level A through Level D and their typical field uses in disaster response?
  • If water service is interrupted to a retail food establishment, which of the following actions is required to protect safety?
  • In ICS, which role is typically NOT part of the Command Staff?
  • In environmental health disasters, when is asbestos risk a concern and what actions should be taken?
  • Why is it important to maintain disinfection residuals in the water supply after a disaster?
  • What is an ionization chamber?
  • Which activity is NOT typically part of the environmental health role in disaster recovery?
  • What is the primary reason for installing backflow preventers in buildings in flood-prone areas?
  • Which SEMS level involves local agencies coordinating through an Emergency Operations Center (EOC)?
  • How long can garbage be stored on-site during an emergency if properly sealed?
  • Which type of ionizing radiation can be deconned?
  • What is the recommended contact time for chlorine in a well-disinfection procedure before flushing?
  • During disaster recovery, environmental health personnel should do which of the following?
  • How should the integrity of a water distribution system be verified during recovery?
  • List three critical food-safety considerations for disaster feeding operations.
  • In a radiation incident, the hot zone corresponds to exposure level of approximately how many mR/hr?
  • Which particles only cause damage when ingested?
  • In incident management, which role is primarily responsible for safety during operations?
  • Which ICS function is responsible for obtaining and moving resources to the incident?
  • What chlorine concentration (ppm) is required to disinfect floors, counters, sinks, and toilets at emergency shelters?
  • SEMS is designed to improve five emergency response elements. Which of the following lists those five elements?
  • What should be included in an After-Action Report (AAR) and Improvement Plan (IP)?
  • Can food be salvaged after a fire or flood? If salvage is allowed, what condition applies and what procedure is used?
  • In SEMS, which term stands for the coordinating role at the Medical Health Operational Area?
  • Which SEMS level in California includes six mutual aid regions?
  • Which components are typically included in a COOP for environmental health?
  • Which parameter should be monitored in the distribution system during a water emergency?
  • How far from the surface should burial stop when burying private garbage?
  • What is the primary purpose of the Incident Command System (ICS) in disaster response, and which are its core organizational components?
  • Which factors help reduce exposure to gamma radiation?
  • If the water is clear, how much bleach should be added to 5 gallons of water to disinfect it?
  • Which of the following describes Air Curtain Incineration?
  • How should a credible exercise be designed to test disaster management capabilities?
  • How far can beta particles travel in the air?
  • The specified trench size is designed to handle approximately how many people per day?
  • What depth is recommended for burying infectious waste?
  • In the field decontamination sequence for chemical exposure, why is removing clothing first?
  • Which statement is listed about fixed facility incineration?
  • During a water outage, which action is explicitly required to protect food safety?
  • Which ICS function is responsible for directing incident objectives and priorities?
  • What is California's incident management system called?
  • Delivered water must have what free chlorine residual?
  • What shelter space per person is recommended for housing during an emergency?
  • During a disaster, which entity is responsible for locating and deploying resources to the State Coordination Center (SCC) from non-impacted areas?
  • Which two tasks are identified as the first priorities for mass care and shelter?
  • What distance from a water source is recommended when burying mass garbage onsite?
  • How many SEMS levels exist?
  • In a radiation incident, how many mR/hour should the staging area be exposed?
  • How does a Geiger counter work?
  • Which practice reduces exposure to gamma radiation?
  • Which two sources of water in a home could be used, though not necessarily for drinking?
  • If there are more than how many evacuees, a full-time environmental health specialist (EHS) must monitor the shelter?
  • Which actions are key to safe shelter sanitation during mass care operations?
  • Which of the following is an advantage of open air burning?
  • Which roles comprise the ICS Command Staff?
  • What is the OSHA maximum permissible concentration for radon?
  • What is the advantage of a Geiger counter?
  • What is the required bed spacing distance in an emergency shelter?
  • What is the general sequence for hazardous materials decontamination in a disaster setting?
  • Which statement best describes the components addressed by a COOP for environmental health services?
  • Which factor influences the type of pit toilets constructed during an emergency?
  • In a disaster, which resource is the top operational priority?
  • Distinguish between Command Staff and General Staff in ICS.
  • How deep should private garbage be buried?
  • How long should emergency-disinfected water be stored?
  • How many steps are listed for implementing a boil water order after service resumes?
  • Teratogenic effects are most closely associated with which outcome?
  • How much household bleach is needed to disinfect 1,000 gallons of clear water?
  • In pet and people combined sheltering, which process is essential for reuniting separated pets with owners?
  • If the water is cloudy, how much bleach should be added to 5 gallons of water to disinfect it?
  • What type of particles are emitted by radon?
  • How many people can one pit toilet serve?
  • In a mass feeding center, how many sinks are recommended and what are their functions?
  • Which meter is better for high levels of radiation - Geiger or Ionization?
  • Which factor is explicitly listed as affecting vector/pest management during a disaster?
  • Which ICS function oversees cost accounting and reimbursement documentation?
  • Which condition allows salvage of a container after a fire or flood?
  • At what point should you stop using a buried mass garbage trench?
  • Syndromic surveillance data is used to guide interventions by detecting outbreaks based on?
  • In shelter operations, why are separate facilities for families with infants important?
  • In ICS, which group is responsible for Operations, Planning, Logistics, and Finance/Administration?
  • What sanitizing solution concentration is recommended for a mass feeding center (chlorine bleach per gallon of water)?
  • Why is animal sheltering important in disaster management, and what considerations apply to pets?
  • Which ICS function is primarily responsible for information sharing and incident status?
  • How deep should human waste be buried at minimum?
  • Which practice is recommended to prevent disease spread through shelter sanitation?
  • What makes NIMS valuable?
  • During a disaster, which statement best describes the responsibilities of the state Office of Emergency Services (OES)?
  • Which of the following is a disadvantage of mass burials?
  • Which considerations are involved in providing safe food in disaster shelters?
  • If trucks are used to haul water, how must they be cleaned prior to use?
  • What must be done after the two-week storage period for garbage stored on-site?
  • Which statement best describes the role of the Public Information Officer during an incident?
  • If burying mass garbage onsite, what are the trench dimensions?
  • How many emergency functions exist under CalOES?
  • Which statement correctly describes the relationship between distance and radiation exposure according to the inverse square law?
  • What are the first two priorities for mass care and shelter?
  • In an emergency, pit privies should be at least how many feet from lakes, streams, and wells?
  • Which of the following is an option for removal of dead animal carcasses?
  • ALARA stands for what phrase?
  • Which items are required to be contained in the medical log book at an emergency shelter?
  • What are best practices for managing volunteers in a disaster response?
  • What best describes Air Curtain Incineration?
  • Which particles are hazardous without ingesting/inhaling?
  • Which type of radiation is most dangerous if ingested/inhaled?
  • Which option best describes the complete process to disinfect a well using chlorine?
  • What mold remediation practices are recommended after water intrusion in buildings?
  • When asbestos-containing materials are damaged during a disaster, who should conduct abatement and what precautions should be followed?
  • What daily covering practice is recommended for mass garbage trenches?
  • Which option correctly defines ionizing radiation interacting with matter?
  • What is a key practice for segregation of hazardous and nonhazardous waste in disaster settings?
  • In incident management, Unified Command is used under which condition?
  • ICS stands for what does ICS stand for?
  • What can stop gamma rays?
  • Which option is NOT a recommended practice for emergency power generation safety?
  • Rad measures energy deposited or absorbed in what?
  • Which factor should be posted with buried human waste?
  • What are essential components of shelter infection prevention and control?
  • Do bacteria and viruses survive incineration?
  • What are cultural and language considerations in disaster risk communication?
  • Somatic effects may take what to become evident?
  • Which of the following is listed as a disadvantage of fixed facility incineration?
  • Teratogenic effects are associated with what outcome?
  • Which of the following best describes essential sanitation facility considerations in shelter operations?
  • Per SEMS, are emergencies managed at the highest or lowest level?
  • Which statement about the ICS-214 Unit Log is true?
  • What is syndromic surveillance and how is it used in disaster response?
  • What are Medical Countermeasures (MCM) stockpiles and their role in disasters?
  • Who can request a Presidential declaration of emergency or major disaster?
  • Which of the following factors influence evacuation decision-making in a disaster?
  • What is backflow in sewer systems, and why is it a hazard after floods?
  • What does EMAC stand for?
  • Under ICS, what is considered a manageable span of control?
  • During a disaster, the State Operations Center (SOC) is responsible for which of the following?
  • Are alpha or beta particles smaller?
  • A COOP aims to preserve essential functions during emergencies. Which is NOT a typical feature?
  • Rad is primarily a measure of what?
  • In a hazardous materials decontamination process, what is the purpose of the warm zone?
  • What will protect you from gamma rays?
  • What is the most useful way to measure radiation exposure?
  • How much iodine is needed to disinfect 5 gallons of water?
  • Which unit is used to express radiation exposure in the given guidelines?
  • Unity of command means which of the following?
  • The Operational Planning Worksheet (ICS-215) is used primarily for what purpose?
  • Which of the following correctly lists the five ICS functions?
  • Which ICS forms are commonly used for resource management and planning?
  • Which of the following best describes the purpose of a COOP for environmental health services?
  • Which expression correctly represents the general formula for calculating the amount of chlorine bleach needed to achieve a desired ppm, given the percent chlorine in the product?
  • Which statement best defines risk communication in disaster management?
  • In California, which statutory framework authorizes local disaster declarations and sets powers for public health emergencies?
  • What is the percentage of chlorine residual in typical household bleach?
  • Which indicators are used to assess a potential hazardous materials release?
  • In disaster response planning, which item is listed as the first priority for protecting food safety?
  • How should disaster waste management handle household hazardous waste after a disaster?
  • SEMS stands for which phrase?
  • The rem is used to compare radiation types on the same scale.
  • Describe the process for coordinating food recalls during a disaster.
  • What does SCC stand for in SEMS?
  • Which option is NOT a key element of a debris management plan?
  • What is the ALARA principle in radiation safety?
  • Which statement best distinguishes sanitation, disinfection, and sterilization in environmental health practice?
  • Which action is required immediately when a boil water order is issued for a retail facility?
  • What is a core element of integrated planning for pet sheltering or co-sheltering in disasters?
  • In hazardous materials operations, which zone is the clean area?
  • What is the recommended span of control for supervisors in ICS?
  • Which federal agency makes recommendations for radon exposure in homes?
  • Which material can stop a beta particle?
  • What can stop an alpha particle?
  • During a disaster, what happens when an incident overwhelms local response capabilities?
  • What is ionizing radiation?
  • In a hazardous materials or decontamination area, which statement correctly defines hot, warm, and cold zones?
  • What 4 things could happen when radiation hits a cell?
  • How can you protect yourself from gamma radiation?
  • Genetic effects refer to biological effects on which group?
  • Which ratio correctly states the required number of restrooms for an emergency shelter relative to residents?
  • Roentgen measures what?
  • The unit pCi/L is used to measure which quantity in the context of radon?
  • Which of the following is NOT a form of ionizing radiation?
  • In a disaster, when coordinating food recalls, which group should be notified first?
  • Which functions are included in the ICS General Staff?
  • X-rays vs gamma rays: which penetrates farther?
  • Lead exposure risk in housing after a disaster, and how should it be mitigated?
  • Which ICS group procures equipment, food, transportation, and communications?
  • What is a staging area?
  • What chlorine concentration (ppm) is required to disinfect food contact surfaces and toys at emergency shelters?
  • Which practice is recommended for safety when using emergency power at shelters?
  • Which describes a possible cellular outcome after radiation exposure?
  • What is the purpose of CHEMTREC?
  • Somatic effects refer to damage to which type of cells?
  • During well disinfection, why should you open the farthest tap until a chlorine odor is detected?
  • Which penetrates further, X-rays or gamma rays?
  • If there is low water pressure after an emergency, what is the concern?
  • Which roles report directly to the Incident Commander?
  • Which ICS group is responsible for developing the tactical action plan and the incident action plan?
  • Which steps are involved in vector control following floods or periods of standing water?
  • What is mutual aid, and why is resource typing important in disaster management?
  • Which statement accurately differentiates a drill from a tabletop exercise?
  • What is the first priority in solid waste disposal during a disaster?
  • What is the most important aspect of solid waste management after a disaster?
  • Environmental health is supported under which Emergency Support Functions (ESFs)?
  • When assessing the status of the drinking water supply, which of the following should you check?
  • Which ICS function is established first after command?
  • In the ICS system, which set of roles comprises the command staff?
  • What is a disadvantage of a Geiger counter?
  • Which of the following is NOT listed as a basic emergency function?
  • What is the purpose of having four sinks in a mass feeding center?
  • Inhalation of radon alpha particles increases the risk of which health effect?
  • When a retail food facility is under a boil water order, what is the first action to take?
  • How deep and wide should a burial hole for private garbage be?
  • What does picocuries measure?
  • What type of container should be used to store emergency-disinfected water?
  • What is the typical sequence for decontaminating a patient exposed to chemical agents in the field?
  • Which outcome is achieved by integrated planning for pet sheltering or co-sheltering?
  • Which statement correctly describes ionization chamber measurement?
  • How many inches of soil should be placed over private garbage per day?
  • What does NIMS stand for?
  • What triggers a boil-water advisory, and what steps should be taken in response?
  • Which description best captures risk communication in disaster management?
  • Resource typing in disaster management serves what main purpose?
  • What constitutes a Multi-Casualty Incident (MCI) and how does it affect local response?
  • What is the role of the Emergency Operations Center (EOC) during a disaster?
  • Which SEMS level encompasses multiple jurisdictions and mutual aid and includes the involvement of MHOAC?
  • Medical Countermeasures (MCM) stockpiles are typically managed by which entity?
  • How should water quality be managed after a disaster event?
  • What are the key elements of a debris management plan following a disaster?
  • Radon concentration is typically reported in which unit?
  • Which burial procedure for human waste is recommended?
  • How long should water be boiled to disinfect it?
  • How much water is ideal to provide per person per day in emergency planning?
  • At the Operational Level of SEMS, which role coordinates medical health operations?
  • How are water system operations and sampling coordinated after a contamination event?
  • What is the recommended maximum radon exposure in a home?
  • For state reimbursement, which management system must an EOC utilize?
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