NFPA 99 Code Worksheet 10 2026–2027 – Practice
Questions, Answers & Test Prep
After a final tie in on an active vacuum system, each vacuum joint shall be tested with a BLANK leak
detector or other means that will allow detectant on an active vacuum system - correct answers -
Ultrasonic
After the final tie in each joint shall be leak tested by the source gas. New work and the existing system
at the normal operating pressure shall be leak checked with a leak detectant that is safe for use with
oxygen and does not contain - correct answers -Ammonia
After the piping system, the blow down test shall be done. Then the installer must perform which test? -
correct answers -Initial pressure test
Alarm panels and shutoff valves labeling shall be ____________ when modifications are made, changing
the areas serviced - correct answers -Updated
Area alarms shall be tested to verify the warning signals for all vital life support and critical care areas if
the pressure in the piping system increases or decreases by BLANK - correct answers -20%
At the sample port a demand of approximated 25% load shall be created to cause the compressors to
cycle on and off continuously and the dryers to operate for the ______ period. - correct answers -12
hour
Before the piping system is put into use, who is responsible for the ascertaining that the gas delivered to
the outlet/inlet has the proper labels and connecting fittings. - correct answers -Facility Authority
1
Questions, Answers & Test Prep
After a final tie in on an active vacuum system, each vacuum joint shall be tested with a BLANK leak
detector or other means that will allow detectant on an active vacuum system - correct answers -
Ultrasonic
After the final tie in each joint shall be leak tested by the source gas. New work and the existing system
at the normal operating pressure shall be leak checked with a leak detectant that is safe for use with
oxygen and does not contain - correct answers -Ammonia
After the piping system, the blow down test shall be done. Then the installer must perform which test? -
correct answers -Initial pressure test
Alarm panels and shutoff valves labeling shall be ____________ when modifications are made, changing
the areas serviced - correct answers -Updated
Area alarms shall be tested to verify the warning signals for all vital life support and critical care areas if
the pressure in the piping system increases or decreases by BLANK - correct answers -20%
At the sample port a demand of approximated 25% load shall be created to cause the compressors to
cycle on and off continuously and the dryers to operate for the ______ period. - correct answers -12
hour
Before the piping system is put into use, who is responsible for the ascertaining that the gas delivered to
the outlet/inlet has the proper labels and connecting fittings. - correct answers -Facility Authority
1
