CBET Medical Gas Systems 5

Question 1

A hospital's master alarm panel shows a 'Source Valve Closed' alarm for the surgical vacuum system. What is the FIRST corrective action?

Accepted Answer

Locate and open the source shutoff valve

Answer

Shut down all surgical suites

Answer

Bypass the alarm and notify engineering in 24 hours

Answer

Replace the vacuum pump immediately

Question 2

What minimum purity level is required for medical-grade oxygen supplied by bulk cryogenic systems in the US?

Accepted Answer

99%

Answer

93%

Answer

95%

Answer

99.5%

Question 3

Which type of medical gas outlet connector system uses non-interchangeable, gas-specific body configurations to prevent misconnections?

Accepted Answer

Both DISS and NIST

Answer

DISS (Diameter Index Safety System)

Answer

CGA pin-index system

Answer

NIST (Non-Interchangeable Screw Thread) system

Question 4

During routine PM on a medical gas manifold, a technician finds a pressure gauge reading 10% lower than the adjacent calibrated reference gauge. What is the appropriate action?

Accepted Answer

Recalibrate or replace the gauge and document the finding

Answer

Adjust the regulator set point to compensate

Answer

Ignore if within 15% of reference value

Answer

Increase supply cylinder pressure

Question 5

What is the purpose of a pressure/vacuum indicator (PVI) installed in a medical gas zone?

Accepted Answer

Provide local visual indication of line pressure without requiring tools

Answer

Control flow rate to patient equipment

Answer

Automatically shut off gas if pressure drops below set point

Answer

Filter particulate from the gas line

Question 6

Which regulatory body classifies medical gas systems components as medical devices subject to 510(k) or PMA review?

Accepted Answer

FDA

Answer

OSHA

Answer

EPA

Answer

CMS

Question 7

A technician notices ice formation on the exterior of a liquid oxygen supply line during normal operation. What does this most likely indicate?

Accepted Answer

Normal condensation and freezing due to cryogenic temperatures

Answer

A dangerous pressure surge in the line

Answer

A significant leak of liquid oxygen

Answer

Contamination of the oxygen with water vapor