NATIONAL FUEL GAS CODE EXAM FINAL
PAPER 2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ The actual composition of wet natural gas depends on the type of
well and geographical location where the fuel gas originates.
Answer: True
◉ It is important to know the specific gravity of a particular gas
when calculating flows through piping systems and when sizing gas
burner orifices. Answer: True
◉ The three basic requirements for combustion are the existence of
fuel, oxygen or air, and a source of ignition. Answer: True
◉ The second law of thermodynamics, the law of conservation of
energy, states that energy cannot be created or destroyed but can be
changed from one form to another. Answer: False (This describes the
first law of thermodynamics)
◉ Products of combustion are the constituents resulting from the
combustion of a fuel with the oxygen of the air, including the inert
gases but excluding air. Answer: True
, ◉ For combustion to take place, two atoms of oxygen for every one
atom of carbon, and one atom of oxygen for every two atoms of
hydrogen are required. Answer: True
◉ Nitrogen and carbon dioxide are examples of noble gases. Answer:
False (Nitrogen and carbon dioxide are examples of inert gases)
◉ Combustion air includes three components: fuel combustion air,
excess air, and dilution air. Answer: True
◉ Since complete or perfect combustion is only possible under
theoretical conditions, gas appliances must be adjusted so that all
fuel gas is completely burned and no harmful products of incomplete
combustion are produced. Answer: True
◉ Spontaneous combustion is combustion in which the fuel is only
partially burned and is capable of being burned further under
proper conditions. Answer: False (This description is for incomplete
combustion)
◉ Most gas burners consist of only one buner type. Answer: False
(Most Gas burners are a combination of burner types)
◉ Fuel gas is normally delivered into the appliance combustion
chamber under pressure. Answer: True
PAPER 2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ The actual composition of wet natural gas depends on the type of
well and geographical location where the fuel gas originates.
Answer: True
◉ It is important to know the specific gravity of a particular gas
when calculating flows through piping systems and when sizing gas
burner orifices. Answer: True
◉ The three basic requirements for combustion are the existence of
fuel, oxygen or air, and a source of ignition. Answer: True
◉ The second law of thermodynamics, the law of conservation of
energy, states that energy cannot be created or destroyed but can be
changed from one form to another. Answer: False (This describes the
first law of thermodynamics)
◉ Products of combustion are the constituents resulting from the
combustion of a fuel with the oxygen of the air, including the inert
gases but excluding air. Answer: True
, ◉ For combustion to take place, two atoms of oxygen for every one
atom of carbon, and one atom of oxygen for every two atoms of
hydrogen are required. Answer: True
◉ Nitrogen and carbon dioxide are examples of noble gases. Answer:
False (Nitrogen and carbon dioxide are examples of inert gases)
◉ Combustion air includes three components: fuel combustion air,
excess air, and dilution air. Answer: True
◉ Since complete or perfect combustion is only possible under
theoretical conditions, gas appliances must be adjusted so that all
fuel gas is completely burned and no harmful products of incomplete
combustion are produced. Answer: True
◉ Spontaneous combustion is combustion in which the fuel is only
partially burned and is capable of being burned further under
proper conditions. Answer: False (This description is for incomplete
combustion)
◉ Most gas burners consist of only one buner type. Answer: False
(Most Gas burners are a combination of burner types)
◉ Fuel gas is normally delivered into the appliance combustion
chamber under pressure. Answer: True
