NFPA 31 EXAM QUESTIONS &
UPDATED CORRECT ANSWERS
PASSED ALREADY GRADED A+
define Authority Having Jurisdiction - CORRECT ANSWER NFPA 3.2.2
define the term "Listed" - CORRECT ANSWER NFPA 3.2.4
a closed vessel in which water is heated, steam is generated is known as a -
CORRECT ANSWER boiler
NFPA 31 3.3.6.4
a burner that requires a chimney or venting system of natural draft is called a ____
burner - CORRECT ANSWER natural draft-type burner
NFPA 31 3.3.6.4
confined space is defined by NFPA 31 as ______ ? - CORRECT ANSWER a space
whose volume is less than 50 ft^3 per 1,000 BTU/hr. of the aggregate input
NFPA 31 3.3.14
a system consisting of an appliance, combustion air and flue gas connections between
the appliance and the outside atmosphere, and a vent cap supplied by the
manufacturer, constructed so that all air for combustion and draft control is obtained
from the outside atmosphere and all flue gases are discharged to the outside
atmosphere is known as a _____ appliance - CORRECT ANSWER direct vent
appliance
NFPA 31 3.3.21
what is a direct venting system - CORRECT ANSWER a venting system that is
constructed and installed so that all air for combustion and draft control is taken from
interior building spaces and all combustion products are discharged to the outside
atmosphere
NFPA 31 3.3.23
the length of time fuel is permitted to be delivered to the main burner before the flame-
sensing device is required to detect the main flame is called _____? - CORRECT
ANSWER main burner flame establishing period
NFPA 31 3.3.39
the application of a mechanical means of removing combustion products to the outside
atmosphere is known as ___? - CORRECT ANSWER power venting
, NFPA 31 3.3.48
the interval of time during burner start-up in which air is introduced into the combustion
chamber and the associated flue passages in such a volume and manner to completely
replace the air or fuel-air mixture contained therein prior to initiating ignition is the ___
period - CORRECT ANSWER pre-purge period
NFPA 31 3.3.49
the action of shutting off al fuel and ignition energy to an appliance by means of a safety
control or controls, such that restart of the appliance cannot be accomplished without
some form of manual reset that requires local, manual intervention is known as ___? -
CORRECT ANSWER safety shutdown
NFPA 31 3.3.54
the interval of time during which the main burner fuel is permitter to be delivered into the
ignition zone before the flame-sensing device is required to detect flame is the ____
period - CORRECT ANSWER trial for ignition period
NFPA 31 3.3.59
any space whose volume is equal to or greater than 503 ft per 1,000 BTU/hr. of
aggregate input rating of all fuel-burning appliance installed therein is called a ___
space - CORRECT ANSWER unconfined space
NFPA 31 3.3.60
at what pressure would a relief valve blow off on a low pressure steam boiler? -
CORRECT ANSWER 15psig
NFPA 31 3.3.4.3
what is the clearance from an electrical panel for an oil tank? - CORRECT ANSWER 3
feet
NFPA 31 4.3.6
what is the maximum voltage for safety control circuits - CORRECT ANSWER 150V
NPFA 31 4.4.2
what device would be shut off by high limit? - CORRECT ANSWER the burner
NFPA 31 4.4.3 and 10.5.5
ducts used to convey air from outdoors shall have the same cross-sectional area as the
__? - CORRECT ANSWER the free area of opening to which they connect
NFPA 31 5.2.3.1
the smaller dimension of a rectangular air ducts shall not be less than ___? -
CORRECT ANSWER 3"
NFPA 5.2.3.2
UPDATED CORRECT ANSWERS
PASSED ALREADY GRADED A+
define Authority Having Jurisdiction - CORRECT ANSWER NFPA 3.2.2
define the term "Listed" - CORRECT ANSWER NFPA 3.2.4
a closed vessel in which water is heated, steam is generated is known as a -
CORRECT ANSWER boiler
NFPA 31 3.3.6.4
a burner that requires a chimney or venting system of natural draft is called a ____
burner - CORRECT ANSWER natural draft-type burner
NFPA 31 3.3.6.4
confined space is defined by NFPA 31 as ______ ? - CORRECT ANSWER a space
whose volume is less than 50 ft^3 per 1,000 BTU/hr. of the aggregate input
NFPA 31 3.3.14
a system consisting of an appliance, combustion air and flue gas connections between
the appliance and the outside atmosphere, and a vent cap supplied by the
manufacturer, constructed so that all air for combustion and draft control is obtained
from the outside atmosphere and all flue gases are discharged to the outside
atmosphere is known as a _____ appliance - CORRECT ANSWER direct vent
appliance
NFPA 31 3.3.21
what is a direct venting system - CORRECT ANSWER a venting system that is
constructed and installed so that all air for combustion and draft control is taken from
interior building spaces and all combustion products are discharged to the outside
atmosphere
NFPA 31 3.3.23
the length of time fuel is permitted to be delivered to the main burner before the flame-
sensing device is required to detect the main flame is called _____? - CORRECT
ANSWER main burner flame establishing period
NFPA 31 3.3.39
the application of a mechanical means of removing combustion products to the outside
atmosphere is known as ___? - CORRECT ANSWER power venting
, NFPA 31 3.3.48
the interval of time during burner start-up in which air is introduced into the combustion
chamber and the associated flue passages in such a volume and manner to completely
replace the air or fuel-air mixture contained therein prior to initiating ignition is the ___
period - CORRECT ANSWER pre-purge period
NFPA 31 3.3.49
the action of shutting off al fuel and ignition energy to an appliance by means of a safety
control or controls, such that restart of the appliance cannot be accomplished without
some form of manual reset that requires local, manual intervention is known as ___? -
CORRECT ANSWER safety shutdown
NFPA 31 3.3.54
the interval of time during which the main burner fuel is permitter to be delivered into the
ignition zone before the flame-sensing device is required to detect flame is the ____
period - CORRECT ANSWER trial for ignition period
NFPA 31 3.3.59
any space whose volume is equal to or greater than 503 ft per 1,000 BTU/hr. of
aggregate input rating of all fuel-burning appliance installed therein is called a ___
space - CORRECT ANSWER unconfined space
NFPA 31 3.3.60
at what pressure would a relief valve blow off on a low pressure steam boiler? -
CORRECT ANSWER 15psig
NFPA 31 3.3.4.3
what is the clearance from an electrical panel for an oil tank? - CORRECT ANSWER 3
feet
NFPA 31 4.3.6
what is the maximum voltage for safety control circuits - CORRECT ANSWER 150V
NPFA 31 4.4.2
what device would be shut off by high limit? - CORRECT ANSWER the burner
NFPA 31 4.4.3 and 10.5.5
ducts used to convey air from outdoors shall have the same cross-sectional area as the
__? - CORRECT ANSWER the free area of opening to which they connect
NFPA 31 5.2.3.1
the smaller dimension of a rectangular air ducts shall not be less than ___? -
CORRECT ANSWER 3"
NFPA 5.2.3.2
