CEN Practice Exam | Actual Questions and Answers Latest
Updated 2026/2027 (Graded A+)
• Question
Acids do what to body tissue?
Correct Answer: Cause a coagulation type necrosis
• Question
Alkalis do what to body tissue?
Correct Answer: Liquify tissue on contact
• Question
What do radiation RAYS cause?
Correct Answer: Internal contamination, minimal surface damage (decreases risk to
caregivers)
• Question
What do radiation PARTICLES cause?
Correct Answer: These can be stopped by clothing and remain on surfaces which pose a
threat to others, including caregivers
• Question
How do you treat stings by coelenterates? (i.e. jellyfish, corals)
Correct Answer: Treat these stings with SALT water, because fresh water can stimulate
nematocysts that have not yet fired
• Question
Venom of a black widow is...?
Correct Answer: Neurotoxin
• Question
What causes heat cramps? What do heat cramps usually effect?
Correct Answer: Excessive sodium and potassium loss, effecting large muscle groups i.e.
upper arms, upper legs, abdomen
• Question
Submersion in salt water causes? (3)
Correct Answer: I. Pulmonary edema
II. hypovolemia
III. increased serum electrolyte levels
, • Question
How long should chemical exposure patients be decontaminated
Correct Answer: Minimum of 15 minutes, continue longer until patient states burning
sensation has subsided
• Question
What do you use to treat black widow bites? (4)
Correct Answer: Ice, narcotics, muscle relaxants, and antivenin (lactrodectus)
• Question
Warm frost bite tissue until when?
Correct Answer: Until pink or reddened
• Question
Brown recluse spider bite
Correct Answer: Painless
• Question
Hemorrhagic vs nonhemorhagic blisters in frostbite?
Correct Answer: Hemorrhagic - leave intact Nonhemorrhagic - decried and rinse w sterile
water
• Question
Electrical burns with higher chance of Vfib
Correct Answer: Entrance in one hand and exit in the other (higher chance than feet and
legs)
• Question
Decompression lines involving the Central Nervous System causes what (6)
Correct Answer: I. Visual disturbances
II. Flushing
III. Persistent HA
IV. Partial Paralysis
V. Inability to speak OR hear
VI. Facial and jaw pain
• Question
Pulmonary edema onset
Correct Answer: Shortly after exposure or can take up to 24 hours
Updated 2026/2027 (Graded A+)
• Question
Acids do what to body tissue?
Correct Answer: Cause a coagulation type necrosis
• Question
Alkalis do what to body tissue?
Correct Answer: Liquify tissue on contact
• Question
What do radiation RAYS cause?
Correct Answer: Internal contamination, minimal surface damage (decreases risk to
caregivers)
• Question
What do radiation PARTICLES cause?
Correct Answer: These can be stopped by clothing and remain on surfaces which pose a
threat to others, including caregivers
• Question
How do you treat stings by coelenterates? (i.e. jellyfish, corals)
Correct Answer: Treat these stings with SALT water, because fresh water can stimulate
nematocysts that have not yet fired
• Question
Venom of a black widow is...?
Correct Answer: Neurotoxin
• Question
What causes heat cramps? What do heat cramps usually effect?
Correct Answer: Excessive sodium and potassium loss, effecting large muscle groups i.e.
upper arms, upper legs, abdomen
• Question
Submersion in salt water causes? (3)
Correct Answer: I. Pulmonary edema
II. hypovolemia
III. increased serum electrolyte levels
, • Question
How long should chemical exposure patients be decontaminated
Correct Answer: Minimum of 15 minutes, continue longer until patient states burning
sensation has subsided
• Question
What do you use to treat black widow bites? (4)
Correct Answer: Ice, narcotics, muscle relaxants, and antivenin (lactrodectus)
• Question
Warm frost bite tissue until when?
Correct Answer: Until pink or reddened
• Question
Brown recluse spider bite
Correct Answer: Painless
• Question
Hemorrhagic vs nonhemorhagic blisters in frostbite?
Correct Answer: Hemorrhagic - leave intact Nonhemorrhagic - decried and rinse w sterile
water
• Question
Electrical burns with higher chance of Vfib
Correct Answer: Entrance in one hand and exit in the other (higher chance than feet and
legs)
• Question
Decompression lines involving the Central Nervous System causes what (6)
Correct Answer: I. Visual disturbances
II. Flushing
III. Persistent HA
IV. Partial Paralysis
V. Inability to speak OR hear
VI. Facial and jaw pain
• Question
Pulmonary edema onset
Correct Answer: Shortly after exposure or can take up to 24 hours
