2021 Practice Test #6

When is the initial pressure test done by a Medical Gas Installer, on a nitrous oxide system?

• After blow down of the distribution piping

• After installation of alarm sensors

• Before blow down of the distribution piping

• Before installation of rough-in assemblies

In those portions systems intended to handle oxygen at pressures greater than 350 psi, the interconnecting hose shall NOT contain ______________ materials.

• brass

• copper

• polymeric

• stainless steel

In a Category 1 Dental and Gas Vacuum piping system, which of the following is an NFPA 99 requirement for the labeling of pipes?

• Color coding and pressure requirements of Table 5.1.11

• Fixed label width

• Label shall wrap completely around the pipe

• Reflective label

Which of the following is permitted to be installed to isolate or shut off piping, for servicing of individual rooms or areas?

• In-line shutoff valve

• Main line valve

• Source valve

• Zone Valve

Which of the following treatments shall be performed before brazing cut ends of a tube, to be installed in a medical gas piping system?

• An argon purge shall be performed

• Cut ends shall be rolled smooth or deburred

• Extensions shall be added for brazing

• Treatment is NOT required; they may be brazed as is

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 another.

• area, master

• local, master

• master, local

• master, area

In a non-anesthetizing area, on which side of the zone valve shall the pressure/vacuum sensor be located?

• Station outlet/inlet side

• Source side

• Upstream side

• NFPA 99 does NOT specify a requirement

What is the purpose of using an oxygen analyzer during the the piping purge prior to brazing?

• To assure that all ambient air has been removed from the pipeline

• Maintain a nitrogen atmosphere of at least 95% within the piping system

• Provide continuous monitoring during the verification test

• Reduce the oxygen content below 5% before brazing

Medical gas master, area and local systems shall be set to actuate a(n) __________ indication when the communication with the alarm-initiating device is disconnected.

• audible

• audible and visual

• service

• visual

Refer to diagram #1: the tool shown allows the installer to mechanically limit the make-up depth of the fitting to be brazed. Under what conditions is this method permitted for the installation of medical gas piping?

• Only on final line connections

• Only on vacuum systems

• Where a BCuP 5 brazing rod is used

• Where socket depths conform to ANSI/AMSE B16.50