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EFMB WRITTEN TEST 2024/2025 with Verified Answers| 100% Correct| Rated A+
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EFMB WRITTEN TEST 2024/2025 with Verified Answers| 100%Correct| Rated A+
Heat exhaustion is the most common form of heat injury and is generally not associated with evidence
of organ damage. It is a result of peripheral vascular collapse due to excessive salt depletion and
dehydration. This condition is the result of excessive loss of both salt and water, usually due to profuse
sweating as the body attempts to cool itself. As evidenced by the profuse sweating, with heat
exhaustion the body's heat balance mechanism is still functioning normally. Classic symptoms include
profuse sweating, trembling, weakness, loss of coordination. Additional symptoms may include
headache, tingling in the hands and feet, paleness, difficulty breathing, irregular heartbeat, loss of
appetite, nausea, and vomiting. The skin is generally cool and moist from the evaporation of sweat, the
pulse rate is rapid (120 to 200 beats per minute), blood pressure may be low, and body temperature
may be lower than normal (as in cases where hyperventilation is present) or slightly elevated, but the
rectal temperature is usually elevated.
Fill in the moderate work/rest cycle timelines for the Wet Bulb-globe temperatures (WBGT) below:
(picture not included) - ✔✔Review work/rest and water consumption guide.
(No limit = NL, quarts per hour = qt/hr, wet bulb globe temperature = WBGT)
Heat Cat 1 - WBGT Index 78-81.9 °F
Easy Work: NL work/rest, 1/2 qt/hr water
Moderate Work: NL work/rest, 3/4 qt/hr water
Hard Work: 40/20 work/rest, 3/4 qt/hr water
Heat Cat 2 (Green) - WBGT Index 82-84.9 °F
Easy Work: NL work/rest, 1/2 qt/hr water
,Moderate Work: 50/10 work/rest, 3/4 qt/hr water
Hard Work: 30/30 work/rest, 1 qt/hr water
Heat Cat 3 (Yellow) - WBGT Index 85-87.9 °F
Easy Work: NL work/rest, 3/4 qt/hr water
Moderate Work: 40/20 work/rest, 3/4 qt/hr water
Hard Work: 30/30 work/rest, 1 qt/hr water
Heat Cat 4 (Red) - WBGT Index 88-89.9 °F
Easy Work: NL work/rest, 3/4 qt/hr water
Moderate Work: 30/30 work/rest, 3/4 qt/hr water
Hard Work: 20/40 work/rest, 1 qt/hr water
Heat Cat 5 (Black) - WBGT Index >90 °F
Easy Work: 50/10 work/rest, 1 qt/hr water
Moderate Work: 20/40 work/rest, 1 qt/hr water
Hard Work: 10/50 work/rest, 1 qt/hr water
Notes:
, The work/rest times and fluid replacement volumes will sustain performance and hydration for at least
4 hours of work in the specified heat category. Individual water needs will vary ± ¼ qt/hr. Rest means
minimal physical activity (sitting or standing), accomplished in the shade if possible. CAUTION: Hourly
fluid intake should not exceed 1½ quarts. Daily fluid intake should not exceed 12 quarts. Wearing body
armor in humid climates adds 5°F to the WBGT index. Wearing chemical, biological, radiological, and
nuclear protective ensemble in humid climates adds 10°F to the WBGT index.
Noise: this determines pitch; high-pitched noises are more dangerous to hearing than low-pitched
noises. - ✔✔Frequency
The frequency of a noise determines its pitch, which is that attribute of an auditory sensation in which
sounds may be ordered on a scale extending from low to high. High-frequency (high-pitched) noises are
more dangerous to hearing than low-frequency (low-pitched) noises.
Noise: the relative loudness of the noise, expressed in decibels, will play a large part in determining the
degree of hazard; the louder the noise, the greater it's potential for causing hearing loss. - ✔✔Intensity
The relative loudness of the noise, expressed in decibels, will play a large part in determining the
degree of hazard; the louder the noise, the greater it's potential for causing hearing loss
Noise: may be continuous or intermittent; it may be steady or made up of a series of impact or
impulse noises. - ✔✔Nature of the Noise
Noise may be continuous or intermittent. It may be steady or made up of a series of impact or impulse
noises.
Noise: the longer the exposure, the greater the damage to the hearing mechanism. -
✔✔Exposure Duration
The longer the exposure, the greater the damage to the hearing mechanism. Exposure duration is
usually expressed in terms of a time-weighted average, which takes into account both intensity of noise
and duration of the exposure.
You are a member of the Field Sanitation Team. You are responsible for ensuring that the unit water
supply is safe for human consumption. From the terms listed below, your task is to select and explain
the best term that describes water that is safe for consumption.
Non-potable Water, Palatable Water, Potable Water - ✔✔Potable water is water from a source that has
been treated and approved by preventive medicine personnel to meet the short-term potability or long-
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