Nora Bronze Study Guide
Minimum distance that a tank should be from the burner. - Correct Answer-5 feet
Vent and Fill pipe termination - Correct Answer-Vent and fill pipes should terminate
outside the building at a point at least 2 feet from any building opening and 5 feet from
any air inlet or fuel gas outlet.
Vacuum calculations for fuel pump. - Correct Answer-1" for every foot of lift
1" for every 10ft of run
1/2"-1" for the filter.
Shaft seal pressure of fuel unit. - Correct Answer-Nfpa 31 limits shaft seal pressure to
3psi but most are rated at 10 psi.
Single stage one pipe systems should not be operated above ________ - Correct
Answer-6" Vacuum.
Single stage two pipe systems should not be operated above ____________ - Correct
Answer-10" Vacuum.
Although manufacturers rate two stage fuel units at up to 17" of vacuum NORA
recommends that they should operate below ___________ - Correct Answer-12"
Vacuum.
Flash point - Correct Answer-The maximum temperature of a fuel at which it can be
safely stored and handled without serious fire hazard.
100°F for #2 Fuel
200°F for biodiesel
Fire Point - Correct Answer-The lowest temperature where the vapor of a liquid will
initiate and sustain a combustion reaction
500°F for #2 fuel
Pour point - Correct Answer-The lowest temperature at which fuel will flow. Below this it
become a waxy gel.
17°-21°F for #2 Fuel.
Cloud Point - Correct Answer-The temperature at which wax crystals begin to form in
the fuel.
Minimum distance that a tank should be from the burner. - Correct Answer-5 feet
Vent and Fill pipe termination - Correct Answer-Vent and fill pipes should terminate
outside the building at a point at least 2 feet from any building opening and 5 feet from
any air inlet or fuel gas outlet.
Vacuum calculations for fuel pump. - Correct Answer-1" for every foot of lift
1" for every 10ft of run
1/2"-1" for the filter.
Shaft seal pressure of fuel unit. - Correct Answer-Nfpa 31 limits shaft seal pressure to
3psi but most are rated at 10 psi.
Single stage one pipe systems should not be operated above ________ - Correct
Answer-6" Vacuum.
Single stage two pipe systems should not be operated above ____________ - Correct
Answer-10" Vacuum.
Although manufacturers rate two stage fuel units at up to 17" of vacuum NORA
recommends that they should operate below ___________ - Correct Answer-12"
Vacuum.
Flash point - Correct Answer-The maximum temperature of a fuel at which it can be
safely stored and handled without serious fire hazard.
100°F for #2 Fuel
200°F for biodiesel
Fire Point - Correct Answer-The lowest temperature where the vapor of a liquid will
initiate and sustain a combustion reaction
500°F for #2 fuel
Pour point - Correct Answer-The lowest temperature at which fuel will flow. Below this it
become a waxy gel.
17°-21°F for #2 Fuel.
Cloud Point - Correct Answer-The temperature at which wax crystals begin to form in
the fuel.
