NFPA 99 Practice Test Questions 2026–2027 – Questions, Answers & References.

NFPA 99 Practice Test Questions 2026–2027 –
Questions, Answers & References
**Under which of these conditions shall the instrument Air Reserve header cylinders be permitted to be
stored with the instrument air compressor?

A) the mechanical equipment room does not contain a boiler.

B) the medical air compressors are in the same room.

C) the only motor-driven machinery in the room is for instrument air equipment.

D) the room is secured with lockable doors. - correct answers -C) The only motor-driven machinery in
the room is for the instrument air equipment




Riser valves are those valves located where?

A) adjacent to the main riser downstream of any zone valve.

B) anywhere in the lateral branches of the piping system.

C) in the mainline adjacent to the base of the riser.

D) in the riser adjacent to the mainline. - correct answers -D) In the riser adjacent to the main line
{5.1.4.4}




When is the initial pressure test conducted by the installer?

A) after blowdown of the distribution piping.

B) after installation of alarm sensors.

C) before blowdown of distribution piping.

D) before installation of station rough in assembly. - correct answers -A) After blow-down of the
distribution piping.{5.1.12.2.3.2(1)}




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,**In those portions of systems intended to handle oxygen at pressure greater than 350 psi the inter
connecting hose shall not contain what materials?

A) brass.

B) copper

C) polymeric

D) stainless steel - correct answers -C) Polymeric




The tool shown here allows the installer to mechanically limit the makeup depth of the fitting to be
brazed. Under what condition is this method permitted for the installation of medical gas piping?

A) only on final line connectors.

B) only on vacuum systems.

C) where only B cup 5 brazing rod is used

D) where the limited makeup depth is not less than minimum cut depth her ANSI / ASME
recommendations - correct answers -D) Where the limited makeup depth is not less than minimum cup
depth current ANSI\ASME recommendation {5.1.10.4.6.1}




What is the standard gauge pressure for nitrogen gas service?

A) 15 - 30

B) 50 - 55

C) 162 185

D) it varies with system type. - correct answers -C) 160 - 185psi {5.1.11}




What is a NFPA 99 requirement for labeling of pipes in medical gas system?

A) color coding

B) fixed label width

2

, C) label shall wrap completely around pipe.

D) reflective label - correct answers -A) Color coding {5.1.11.1(1)}




A wireless communication device is employed in a medical gas or vacuum warning system. what type of
supervision is required for this device?

A) a visual indicator Shelby located in maintenance officer or engineering department.

B) this device shall be installed at the medical gas or vacuum source.

C) this device shall be located at nurses station.

D) this device will be supervised such that failure communication shall initiate an alarm. - correct
answers -D) This device will be supervised such that failure of communication shall initiate an alarm
{5.1.9.1 (12)}




In a facility where Medical Gas vacuum systems are present and the failure of such equipment or
systems is likely to cause any major injury or death to patients or caregivers this system shall be
designed to meet which category requirements?

A) 1

B) 2

C) 3

D) 4 - correct answers -A) category 1 {5.1.1.2(2) or 4.1.1}




A faculty is in the planning stages of installing an emergency oxygen service connection (ESOC). How
many feet is the minimum amount of clearance required around this connection?

A) 1 foot

B) 3 feet

C) 5 feet

D) Clearance must be 1-1/2 times the width of the auxiliary. - correct answers -B) 3 feet {5.1.3.5.15.2(7)}

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