NGA 70 Properties of Natural Gas and Abnormal Operating
Conditions New Update With 100% Correct Solutions!!
BASED ON STUDY MANUAL
Aldehydes - ANSWER>>Poisonous chemical created from incomplete combustion
Carbon Monoxide - ANSWER>>Toxic by-product generated by incomplete combustion of
natural gas
City Gate - ANSWER>>Regulating station that reduces the pressure and measures the
quantity of gas received from the distribution pipeline and prepares it for consumption
by the consumer, accomplished by injecting a odorant into the gas stream
Combustion - ANSWER>>The three requirements of combustion are fuel, oxygen, and
ignition source
Compressor Station - ANSWER>>Machine that compresses the gas to a higher
pressure, to makeup for pressure drop thru length of pipeline. Three types of
Compressor stations: Production, Storage, Transmission
Emergency Shutdown System ESD answer >> an Emergency shutdown situation
presents itself where in leaking gas calls for shutting the station down the pipeline
would go into an immediate isolation mode generated by automated valves
Excess Flow Valve answer >> inserted on a service line, its sole purpose of serving is in
ensuring the valve simply shuts down and closes any instances of pre-established flow
quantities passed through them
,Heaters - ANSWER>>Used during the processing of natural gas to keep gas from
temperature from falling below freezing to prevent ice ball formation on pipes and
condensation within pipes
Hydrocarbon - ANSWER>>The combination of the elements hydrogen and carbon that
make up the basic elements of oil, natural gas, and coal
Ignition Temperature - ANSWER>>The temperature at which a substance will ignite. The
ignition temperature of natural gas is about 1100F to 1200F
Meter - ANSWER>>A mechanical device which measures the volume of the 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
Odorants - ANSWER>>Natural Gas has little or no odor and no color, so a odorant is
added to aid leak detection
Mercaptan - ANSWER>>Rotten Egg odor, chemical added to natural gas to assist in
detecting gas leaks
Pressure Regulator - ANSWER>>Equipment placed in the gas line for reducing,
maintaining, and controlling the gas pressure in that portion of the piping system
downstream of the equipment
Range of flammability definition - ANSWER>>The range which gas will burn. The range
of flammability for natural gas-air mixtures is approx. 5% to 15% natural gas
Regulating Station - ANSWER>>Reduces the pressure and measures the quantity of
gas received from the distribution pipeline and prepares it by putting in odorants into
the gas stream for consumers.
, Service Line - ANSWER>>A pipe that conveys gas from a common source of supply to a
meter set assembly
Service Regulator - ANSWER>>Mechanical device serving to regulate at constant
pressure, the quantity flow of gas therethrough downstream to satisfy demand. Usual
standard of delivery pressure:7 inches of water column
Specific Gravity - ANSWER>>The weight of gas compared to weight of air. The specific
gravity of natural gas is 0.6
Station By-Pass - ANSWER>>Takes over gas flow by maintaining it in the event of
emergency shutdown
The typical specific gravity of natural gas is, 0.60 or 1.55? - ANSWER>>0.60
The presence of ______ in natural gas distinguishes it from other combustible gases or
gases from decaying material, such as sewer gas - ANSWER>>Ethane
If insufficient amounts of air are fed into the gas burner, incomplete combustion will take
place with the result that there will be increased formulation of - ANSWER>>Carbon
Monoxide snd Aldehydes
Combustion of natural gas will occur when which of the following is present? -
ANSWER>>Oxygen, heat/ignition source, fuel
The most common indication of a gas leak is - ANSWER>>Gas Odor
If gas is leaking from a pipeline under frozen soil, the gas typically migrates what
directions? - ANSWER>>Horizontally and Vertically
Odor fading may be caused by chemical instability of the odorant or _____? -
Conditions New Update With 100% Correct Solutions!!
BASED ON STUDY MANUAL
Aldehydes - ANSWER>>Poisonous chemical created from incomplete combustion
Carbon Monoxide - ANSWER>>Toxic by-product generated by incomplete combustion of
natural gas
City Gate - ANSWER>>Regulating station that reduces the pressure and measures the
quantity of gas received from the distribution pipeline and prepares it for consumption
by the consumer, accomplished by injecting a odorant into the gas stream
Combustion - ANSWER>>The three requirements of combustion are fuel, oxygen, and
ignition source
Compressor Station - ANSWER>>Machine that compresses the gas to a higher
pressure, to makeup for pressure drop thru length of pipeline. Three types of
Compressor stations: Production, Storage, Transmission
Emergency Shutdown System ESD answer >> an Emergency shutdown situation
presents itself where in leaking gas calls for shutting the station down the pipeline
would go into an immediate isolation mode generated by automated valves
Excess Flow Valve answer >> inserted on a service line, its sole purpose of serving is in
ensuring the valve simply shuts down and closes any instances of pre-established flow
quantities passed through them
,Heaters - ANSWER>>Used during the processing of natural gas to keep gas from
temperature from falling below freezing to prevent ice ball formation on pipes and
condensation within pipes
Hydrocarbon - ANSWER>>The combination of the elements hydrogen and carbon that
make up the basic elements of oil, natural gas, and coal
Ignition Temperature - ANSWER>>The temperature at which a substance will ignite. The
ignition temperature of natural gas is about 1100F to 1200F
Meter - ANSWER>>A mechanical device which measures the volume of the 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
Odorants - ANSWER>>Natural Gas has little or no odor and no color, so a odorant is
added to aid leak detection
Mercaptan - ANSWER>>Rotten Egg odor, chemical added to natural gas to assist in
detecting gas leaks
Pressure Regulator - ANSWER>>Equipment placed in the gas line for reducing,
maintaining, and controlling the gas pressure in that portion of the piping system
downstream of the equipment
Range of flammability definition - ANSWER>>The range which gas will burn. The range
of flammability for natural gas-air mixtures is approx. 5% to 15% natural gas
Regulating Station - ANSWER>>Reduces the pressure and measures the quantity of
gas received from the distribution pipeline and prepares it by putting in odorants into
the gas stream for consumers.
, Service Line - ANSWER>>A pipe that conveys gas from a common source of supply to a
meter set assembly
Service Regulator - ANSWER>>Mechanical device serving to regulate at constant
pressure, the quantity flow of gas therethrough downstream to satisfy demand. Usual
standard of delivery pressure:7 inches of water column
Specific Gravity - ANSWER>>The weight of gas compared to weight of air. The specific
gravity of natural gas is 0.6
Station By-Pass - ANSWER>>Takes over gas flow by maintaining it in the event of
emergency shutdown
The typical specific gravity of natural gas is, 0.60 or 1.55? - ANSWER>>0.60
The presence of ______ in natural gas distinguishes it from other combustible gases or
gases from decaying material, such as sewer gas - ANSWER>>Ethane
If insufficient amounts of air are fed into the gas burner, incomplete combustion will take
place with the result that there will be increased formulation of - ANSWER>>Carbon
Monoxide snd Aldehydes
Combustion of natural gas will occur when which of the following is present? -
ANSWER>>Oxygen, heat/ignition source, fuel
The most common indication of a gas leak is - ANSWER>>Gas Odor
If gas is leaking from a pipeline under frozen soil, the gas typically migrates what
directions? - ANSWER>>Horizontally and Vertically
Odor fading may be caused by chemical instability of the odorant or _____? -
