Question 1
A gas-filled space decreases in volume as surrounding pressure increases. Which law explains this?
Show answer & explanation
Correct answer: C - Boyle's Law
10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The CHRN exam has 120 questions and runs 2 hours.
These 10 free CHRN questions are organized by exam domain, so you can see how each part of the Certified Hyperbaric Registered Nurse blueprint is tested. Reveal the answer and explanation under each question.
A gas-filled space decreases in volume as surrounding pressure increases. Which law explains this?
Correct answer: C - Boyle's Law
Which tool is used to evaluate residual nitrogen for repetitive air dives?
Correct answer: A - U.S. Navy Residual Nitrogen Timetable
Increased oxygen availability to tissues during HBO exposure is known as which mechanism?
Correct answer: B - Hyperoxygenation
A patient is referred for HBO therapy after gas enters the arterial circulation. Which condition is a UHMS-accepted indication?
Correct answer: A - Air or gas embolism
During treatment a patient develops nausea, visual changes, facial twitching, and seizure activity. Which toxicity pattern is most likely?
Correct answer: B - CNS oxygen toxicity (Paul Bert effect)
A patient develops chest discomfort and respiratory distress during decompression. Which complication requires immediate recognition?
Correct answer: C - Pulmonary barotrauma of ascent
Which statement accurately compares chamber types?
Correct answer: A - Monoplace chambers serve one patient while multiplace chambers accommodate multiple occupants
Before compression, a patient arrives wearing battery-operated hearing equipment. What is the best action?
Correct answer: A - Remove the restricted equipment before treatment
Which step is appropriate when preparing a TcPO2 study?
Correct answer: B - Inspect monitor and ancillary equipment
Which action best demonstrates the nursing process during HBO care?
Correct answer: C - Assessing, planning interventions, and evaluating outcomes
The CHRN exam also covers these domains. Drill them in the full free practice test:
The full bank has 1,020 more CHRN questions with explanations.
Continue in the free practice test →
View plans