RMGA Medical Gas Systems Design & Components 3

Question 1

What is the maximum allowable concentration of carbon monoxide (CO) in medical-grade compressed air per NFPA 99?

Accepted Answer

5 ppm

Answer

NFPA 99 limits carbon monoxide in medical compressed air to no more than 5 ppm to protect patients from CO toxicity.

Question 2

Which of the following piping materials is explicitly prohibited for use in medical gas distribution systems?

Accepted Answer

Galvanized steel pipe

Answer

Galvanized steel pipe is prohibited because zinc coating can react with oxygen and other medical gases, creating contamination hazards.

Question 3

In a medical vacuum system, what is the standard design inlet pressure (vacuum level) required at patient care area outlets per NFPA 99?

Accepted Answer

15 in Hg minimum

Answer

Medical vacuum systems must provide a minimum of 15 inches of mercury (in Hg) vacuum at any outlet in a patient care area under full system load.

Question 4

What type of joint is required for all brazed copper medical gas piping connections per NFPA 99?

Accepted Answer

Brazed socket joint using BCuP or BAg filler metals

Answer

All medical gas piping joints must be brazed using approved BCuP or BAg filler metals; soft solder is prohibited due to insufficient strength and melting point.

Question 5

A ceiling-mounted medical gas outlet boom in an ICU is supplied from which part of the zone distribution system?

Accepted Answer

The local zone branch downstream of the zone valve box

Answer

Ceiling booms and pendants receive medical gases from the zone branch line, which is controlled by the zone valve box for that care area.

(RMGA) Registered Medical Gas Administrator Certification Practice Test

(RMGA) Registered Medical Gas Administrator Certification Practice Test

RMGA Medical Gas Systems Design & Components 3