Medical Gas Review NFPA 99 Exam Questions
with Correct Answers
When the initial pressure test conducted, by a medical gas installer, on a
nitrous oxide system?
A) after blowdown of a distribution piping
B) after installation of alarm sensors
C) before blow down of distribution piping
D) before installation of station rough-in assemblies - CORRECT ANSWER -A)
after blowdown of a distribution piping
In those portions of systems intended to handle oxygen at pressures greater
than 350 psi, the interconnecting hose shall NOT contain __________
materials
A) brass
B) copper
C) polymeric
D) stainless steel - CORRECT ANSWER -C) polymeric
In category 1 dental and gas vacuum piping system, which of the following is
an NFPA 99 requirement for the labeling of pipes?
,A) color coding
B) fixed label width
C) label shall wrap completely around the pipe
D) reflective label - CORRECT ANSWER -A) color coding
Refer to diagram #1 identify #5
A) in-line valve
B) main control valve
C) service valve
D) zone valve - CORRECT ANSWER -A) in-line valve
Refer to diagram #1 identify #6
A) alarm sensor
B) future valve
C) history valve
D) service valve - CORRECT ANSWER -D) service valve
Which of the following treatments shall be preformed before brazing cut
ends of a tube to be installed in a medical gas piping system?
, A) An argon purge shall be preformed
B) cut ends shall be rolled smooth or deburred
C) extensions shall be added for brazing
D) treatment is NOT required , they may be brazed "as is" - CORRECT
ANSWER -B) cut ends shall be rolled smooth or deburred
Manifolds for gas cylinders shall actuate a(n) ______ signal and shall activate
an indicator at all _______ alarm panels to indicate when or just before
changeover from one header to the other
A) area, master
B) local, master
C) master, area
D) master, local - CORRECT ANSWER -B) local, master
In a non-anesthetizing area, on which side of a zone valve shall the
pressure/vacuum sensor be located?
A) station outlet/inlet
B) source side
C) upstream side
D) NFPA 99 doesn't specify a requirement - CORRECT ANSWER -B) source
side
with Correct Answers
When the initial pressure test conducted, by a medical gas installer, on a
nitrous oxide system?
A) after blowdown of a distribution piping
B) after installation of alarm sensors
C) before blow down of distribution piping
D) before installation of station rough-in assemblies - CORRECT ANSWER -A)
after blowdown of a distribution piping
In those portions of systems intended to handle oxygen at pressures greater
than 350 psi, the interconnecting hose shall NOT contain __________
materials
A) brass
B) copper
C) polymeric
D) stainless steel - CORRECT ANSWER -C) polymeric
In category 1 dental and gas vacuum piping system, which of the following is
an NFPA 99 requirement for the labeling of pipes?
,A) color coding
B) fixed label width
C) label shall wrap completely around the pipe
D) reflective label - CORRECT ANSWER -A) color coding
Refer to diagram #1 identify #5
A) in-line valve
B) main control valve
C) service valve
D) zone valve - CORRECT ANSWER -A) in-line valve
Refer to diagram #1 identify #6
A) alarm sensor
B) future valve
C) history valve
D) service valve - CORRECT ANSWER -D) service valve
Which of the following treatments shall be preformed before brazing cut
ends of a tube to be installed in a medical gas piping system?
, A) An argon purge shall be preformed
B) cut ends shall be rolled smooth or deburred
C) extensions shall be added for brazing
D) treatment is NOT required , they may be brazed "as is" - CORRECT
ANSWER -B) cut ends shall be rolled smooth or deburred
Manifolds for gas cylinders shall actuate a(n) ______ signal and shall activate
an indicator at all _______ alarm panels to indicate when or just before
changeover from one header to the other
A) area, master
B) local, master
C) master, area
D) master, local - CORRECT ANSWER -B) local, master
In a non-anesthetizing area, on which side of a zone valve shall the
pressure/vacuum sensor be located?
A) station outlet/inlet
B) source side
C) upstream side
D) NFPA 99 doesn't specify a requirement - CORRECT ANSWER -B) source
side
