Equipment Operation & Maintenance Flashcards
7 cards from real CHT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Equipment Operation & Maintenance flashcards as text
A continuous-flow oxygen analyzer installed in a multiplace hyperbaric chamber is alarming at 25% O2. The appropriate technician response is to:
Answer: Increase ventilation rate, identify the O2 source leak, and consider suspending treatment if the level continues to rise
Rising O2 above 23.5% triggers fire risk protocols: increase ventilation, find and stop the leak source, and escalate per facility procedures.
The recommended method for leak-testing high-pressure oxygen fittings and connections on a hyperbaric chamber is:
Answer: Apply oxygen-compatible leak-detection solution or soapy water and look for bubbles
Oxygen-compatible leak detection fluid creates visible bubbles at leak points without introducing flammable materials or ignition sources.
What is the purpose of back-pressure regulators (BPR) used on the exhaust side of some hyperbaric BIBS systems?
Answer: They maintain a slight positive pressure differential to prevent chamber gas from entering the exhaust mask during breath-hold
A BPR on the BIBS exhaust keeps slight back-pressure so that inhalation pulls cleanly from the supply side and chamber gas cannot contaminate the mask.
A hyperbaric technician must replace a section of high-pressure oxygen tubing. Which tubing material is generally acceptable for this application?
Answer: Stainless steel or copper tubing rated and cleaned for oxygen service
Stainless steel and copper are the accepted materials for high-pressure oxygen lines; PVC, galvanized, and iron with hydrocarbon-based sealants are prohibited.
During a routine maintenance inspection, the hyperbaric technician finds that the chamber's door interlock mechanism does not prevent pressurization with the door open. The correct action is to:
Answer: Lock out/tag out the chamber and remove it from service until the interlock is repaired and tested
A failed interlock is a critical safety device failure; the chamber must be taken out of service until the interlock is restored and verified per LOCKOUT/TAGOUT procedures.
What is the purpose of moisture separators (water traps) installed in the compressed-air supply line to a hyperbaric chamber?
Answer: To remove condensed water that could corrode valves, degrade air quality, and damage regulators
Water traps prevent liquid water condensed during compression from entering and damaging downstream valves, gauges, and the chamber interior.
Which document must accompany a hyperbaric pressure vessel and be retained on-site throughout its service life?
Answer: The ASME Manufacturer's Data Report (Form U-1 or equivalent) and ongoing inspection records
ASME PVHO-1 and code authorities require the Manufacturer's Data Report and all subsequent inspection records to remain with the vessel for its operational life.