Red Card Environmental Health & Safety 5 — Questions and Answers
Question 1: What is the primary physiological mechanism by which heat stroke differs from heat exhaustion?
- Heat stroke occurs only in humid climates while heat exhaustion occurs in dry heat
- In heat stroke the body's thermoregulation fails and sweating stops, causing core temperature to rise dangerously (Correct answer)
- Heat stroke is caused by dehydration alone while heat exhaustion involves electrolyte loss
- Heat exhaustion is more severe and life-threatening than heat stroke
Correct answer: In heat stroke the body's thermoregulation fails and sweating stops, causing core temperature to rise dangerously
Heat stroke represents a failure of the body's cooling system — sweating ceases and core temperature can exceed 104°F, causing organ damage and death if untreated.
Question 2: When conducting a Lookout, Communications, Escape routes, Safety zones (LCES) briefing, who is responsible for verifying that all crew members understand the plan?
- The Incident Commander at the Incident Command Post
- The crew supervisor or Division Supervisor before committing the crew to the assignment (Correct answer)
- The Safety Officer after reviewing the Incident Action Plan
- Each individual firefighter is solely responsible for their own awareness
Correct answer: The crew supervisor or Division Supervisor before committing the crew to the assignment
The crew supervisor must brief and verify crew understanding of LCES before deploying them on any assignment.
Question 3: What environmental impact consideration must crews follow when establishing spike camps in wilderness areas?
- Camps should be placed at ridgelines for maximum radio communication
- Minimum impact practices must be used, including no-trace camping and avoiding sensitive riparian areas (Correct answer)
- Latrines must be placed as close to water sources as possible for sanitation
- Vehicle access roads must be permanently graded for future access
Correct answer: Minimum impact practices must be used, including no-trace camping and avoiding sensitive riparian areas
Minimum impact camping practices are required on wildland fires to protect wilderness resources, including soil, water, and vegetation.
Question 4: A sudden wind shift on a wildland fire is most dangerous because it:
- Increases relative humidity and slows fire spread temporarily
- Can instantly turn the black (burned area) into the green (unburned fuel), trapping firefighters working the line (Correct answer)
- Causes air tankers to divert away from the fire
- Reduces visibility for lookouts positioned upwind
Correct answer: Can instantly turn the black (burned area) into the green (unburned fuel), trapping firefighters working the line
A wind shift can place firefighters who were safely in the black directly in the path of advancing fire from a new direction with no warning.
Question 5: Which of the following actions best reduces the risk of carbon monoxide (CO) poisoning at a fire camp with generator use?
- Running generators inside tents during cold nights to keep equipment warm
- Positioning generators downwind of sleeping areas and never operating them inside enclosed spaces (Correct answer)
- Placing generators as close to the command post as possible for efficiency
- Using CO detectors only in command tents while other areas rely on ventilation
Correct answer: Positioning generators downwind of sleeping areas and never operating them inside enclosed spaces
Generators must always be operated outdoors and downwind of sleeping or working areas because CO is odorless and can be lethal in enclosed or semi-enclosed spaces.
Question 6: When a firefighter reports symptoms of nausea, headache, and confusion after working in a smoke-filled area, the first responder should prioritize:
- Providing extra food and electrolyte drinks and continuing the shift
- Moving the firefighter to fresh air, monitoring vital signs, and seeking medical evaluation (Correct answer)
- Having the firefighter rest for 15 minutes before reassessing
- Administering supplemental oxygen only if the firefighter loses consciousness
Correct answer: Moving the firefighter to fresh air, monitoring vital signs, and seeking medical evaluation
Smoke inhalation causing these symptoms requires immediate removal from the toxic environment and medical evaluation to rule out CO poisoning or other toxic exposure.
Question 7: What is the correct protocol for handling a used fire shelter after it has been deployed in an emergency?
- Refold and repack it for potential reuse on the same assignment
- Retire the shelter from service — a deployed shelter cannot be reused and must be replaced (Correct answer)
- Clean and inspect it, then certify it for limited secondary use
- Leave it in place as a marker for investigation teams
Correct answer: Retire the shelter from service — a deployed shelter cannot be reused and must be replaced
A deployed fire shelter is compromised by heat and stress and must be replaced; it should never be reused and must be retired from service.
Red Card Environmental Health & Safety 5
What is the primary physiological mechanism by which heat stroke differs from heat exhaustion?