NGA 85 EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026
atmospheric corrosion - Answers Corrosion caused by the action of the gaseous elements in the
atmosphere
corrosion - Answers disintegration of a material into its constituent atoms due to chemical reactions
with its surroundings. The loss of electrons of metals reacting with moisture and oxygen
Galvanic Corrosion - Answers Corrosion that occurs when dissimilar metals are in direct contact and
exposed to a moist or wet environment that, in relation to fire protection systems, causes piping to
break down and leak or form hard crystal-like structures in and around the point of contact between
the metals.
Ignition source - Answers Heat related factor, such as smoking, open flames, sparks, etc. that
contribute to the combustion process.
meter - Answers a mechanical device which measure the volume of gas delivered from the operator
to the customer. They are used at residential commercial and industrial buildings that consume fuel
gas supplied by a gas utility.
Meter bar - Answers A pre assembled unit designed to connect gas meters to supply piping and
provide support
Meter Index - Answers Also known as a meter "face" generally consists of the encased metering
hands and dials
Meter loop - Answers A mechanical piping system in which a meter is attached
Meter swivel - Answers The fitting that connects to the inlet and the outlet of a small gas meter.
Meter Union - Answers consists of appropriate fittings used to connect the outlet piping to the
customer's piping
Pressure Regulator - Answers Equipment placed in a gas line for reducing, controlling, and
maintaining the pressure in that portion of the piping system downstream of the equipment
Regulator Vent - Answers An opening in a regulator to the atmosphere
Riser - Answers A general term for vertical runs of gas piping
Service line - Answers a distribution line that transports gas from a common source of supply to a
customer meter or connection to a customers piping whichever is farther downstream or the
connection to a customers piping if there is no customer meter. A customer meter is the meter that
measures the transfer of gas from an operator to a customer.
Surface Oxidation - Answers Commonly known as rust, but it is not considered to be atmospheric
corrosion. Rust does not generally impact pipe wall thickness to the extent wall strength would be
impaired
valve - Answers A device capable of restricting, controlling, or shutting off the flow of gas using s
moving plug, disk, ball, gate, or other device.
192.353 Customers meters and regulators: Location - Answers (A) Accessible, protected from
corrosion and other damage - if outside vehicle damage anticipated
(B) Each service regulator installed within a building just be located as near as practical to the point of
service line entrance
(C) Each meter installed within a building must be located in a ventilated place and not less than 3
feet from any source of ignition or any source of heat which might damage the meter
(D) Where feasible upstream regulator in a series must be located outside the building unless it is
located in a separating metering or regulating building
192.357 Customers meters and regulators : Installation - Answers (A) Each meter and each regulator
must be installed so as to minimize anticipated stresses upon the connecting piping and the meter.
(B) When close all-three nipples are used, the wall thickness remaining after the threads are cut must
meet the minimum wall thickness requirements of this part
(C) Connections made of lead or other easily damaged material may not be used in the installation of
meters or regulators
(D) Each regulator that might release gas in its operation must be vented to the outside atmosphere
atmospheric corrosion - Answers Corrosion caused by the action of the gaseous elements in the
atmosphere
corrosion - Answers disintegration of a material into its constituent atoms due to chemical reactions
with its surroundings. The loss of electrons of metals reacting with moisture and oxygen
Galvanic Corrosion - Answers Corrosion that occurs when dissimilar metals are in direct contact and
exposed to a moist or wet environment that, in relation to fire protection systems, causes piping to
break down and leak or form hard crystal-like structures in and around the point of contact between
the metals.
Ignition source - Answers Heat related factor, such as smoking, open flames, sparks, etc. that
contribute to the combustion process.
meter - Answers a mechanical device which measure the volume of gas delivered from the operator
to the customer. They are used at residential commercial and industrial buildings that consume fuel
gas supplied by a gas utility.
Meter bar - Answers A pre assembled unit designed to connect gas meters to supply piping and
provide support
Meter Index - Answers Also known as a meter "face" generally consists of the encased metering
hands and dials
Meter loop - Answers A mechanical piping system in which a meter is attached
Meter swivel - Answers The fitting that connects to the inlet and the outlet of a small gas meter.
Meter Union - Answers consists of appropriate fittings used to connect the outlet piping to the
customer's piping
Pressure Regulator - Answers Equipment placed in a gas line for reducing, controlling, and
maintaining the pressure in that portion of the piping system downstream of the equipment
Regulator Vent - Answers An opening in a regulator to the atmosphere
Riser - Answers A general term for vertical runs of gas piping
Service line - Answers a distribution line that transports gas from a common source of supply to a
customer meter or connection to a customers piping whichever is farther downstream or the
connection to a customers piping if there is no customer meter. A customer meter is the meter that
measures the transfer of gas from an operator to a customer.
Surface Oxidation - Answers Commonly known as rust, but it is not considered to be atmospheric
corrosion. Rust does not generally impact pipe wall thickness to the extent wall strength would be
impaired
valve - Answers A device capable of restricting, controlling, or shutting off the flow of gas using s
moving plug, disk, ball, gate, or other device.
192.353 Customers meters and regulators: Location - Answers (A) Accessible, protected from
corrosion and other damage - if outside vehicle damage anticipated
(B) Each service regulator installed within a building just be located as near as practical to the point of
service line entrance
(C) Each meter installed within a building must be located in a ventilated place and not less than 3
feet from any source of ignition or any source of heat which might damage the meter
(D) Where feasible upstream regulator in a series must be located outside the building unless it is
located in a separating metering or regulating building
192.357 Customers meters and regulators : Installation - Answers (A) Each meter and each regulator
must be installed so as to minimize anticipated stresses upon the connecting piping and the meter.
(B) When close all-three nipples are used, the wall thickness remaining after the threads are cut must
meet the minimum wall thickness requirements of this part
(C) Connections made of lead or other easily damaged material may not be used in the installation of
meters or regulators
(D) Each regulator that might release gas in its operation must be vented to the outside atmosphere
