NFI Core Review Class Test Examination Questions With Correct Answers

NFI Core Review Class Test

Minimum clearance can be less than that only with labeled clearances

- Correct Answer ✔ ✔ 12"


Minimum clearance for unlisted appliance - Correct Answer ✔ ✔

36"


What is the closest distance a heating appliance that is properly

ventilated and wall protected can be? - Correct Answer ✔ ✔ 12"


A masonry wall constructed directly against a combustible wall can

reduce appliance clearance by...? - Correct Answer ✔ ✔ 33%


An opening is to be cut on an exterior wall of a house to

accommodate a masonry chimney. The inside surface of the chimney

is to be flush with the inside wall of the room. What is the minimum

opening size in the wall if the chimney is 24" wide? - Correct Answer

✔ ✔ 28"

, Single wall connector clearance is? - Correct Answer ✔ ✔ 18"


interior chimney needs a minimum clearance of___________ -

Correct Answer ✔ ✔ 2"


exterior chimney needs a minimum clearance of___________ -

Correct Answer ✔ ✔ 1"


4 Stages of combustion - Correct Answer ✔ ✔ 1. Moisture

evaporation


2. Release of combustible gases


3. Ignition of combustible gas


4. Char burning


The total energy produced by burning one pound of wood is

approximately____________ - Correct Answer ✔ ✔ 8,600 BTUs


Catalytic converters can lower the ignition temperature of wood

smoke to approximately - Correct Answer ✔ ✔ 500 degrees