EFFLORESCENCE - correct answer ✔WHITE POWDERY DEPOSIT LEFT
BY WATER THAT MOVES THROUGH MASONRY AND LEAVES MINERALS
FROM MORTAR OR SOIL BEHIND AS IT EVAPORATES
AIR BARRIER - correct answer ✔ANY PART OF THE BUILDING SHELL
THAT OFFERS
RESISTANCE TO AIR LEAKAGE. IT IS EFFECTIVE IF IT STOPS MOST AIR
LEAKAGE. THE PRIMARY AIR BARRIER IS THE MOST EFFECTIVE OF A
SERIES OF AIR BARRIERS.
AIR EXCHANGE - correct answer ✔THE TOTAL BUILDING AIR
EXCHANGED WITH THE OUTDOORS THROUGH AIR LEAKAGE AND
VENTILATION
ACH50 - correct answer ✔AIR CHANGES PER HOUR AT 50 PASCALS.
THE NUMBER OF TIMES IN AN HOUR THAT THE COMPLETE VOLUME
OF A BUILDING'S AIR IS EXCHANGED FOR OUTSIDE AIR WHEN
DEPRESSURIZED TO 50 PASCALS.
AFUE - correct answer ✔ANNUAL FUEL UTILIZATION EFFICIENCY
EFFICIENCY RATING FOR HEATING APPLIANCES WHICH ACCOUNT
FOR CHIMNEY LOSSES, CABINET LOSSES, AND CYCLING LOSSES.
AIR HANDLER - correct answer ✔A STEEL CABINET CONTAINING A
BLOWER WITH COOLING AND/OR HEATING COILS CONNECTED TO
DUCTS.
, BACKDRAFT DAMPER - correct answer ✔A DAMPER, INSTALLED NEAR
A FAN, THAT ALLOWS AIR TO FLOW IN ONLY ONE DIRECTION.
DUCT BOOT - correct answer ✔A DUCT SECTION THAT CONNECTS
BETWEEN A DUCT AND A REGISTER.
DUCT REGISTER - correct answer ✔A GRILL COVERING A DUCT
OUTLET.
BTU - correct answer ✔BRITISH THERMAL UNIT
THE QUANTITY OF HEAT REQUIRED TO RAISE THE TEMPERATURE OF
ONE POUND OF WATER ONE DEGREE FAHRENHEIT.
BUILDING CAVITIES - correct answer ✔THE SPACES INSIDE WALLS,
FLOORS, AND CEILINGS BETWEEN THE INTERIOR AND EXTERIOR
SHEETING.
FENESTRATIONS - correct answer ✔WINDOWS AND DOORS
BALLOON FRAMING - correct answer ✔LONG, CONTINUOUS FRAMING
MEMBERS THAT RUN FROM SILL PLATE TO EAVE LINE WITH
INTERMEDIATE FLOOR STRUCTURES NAILED TO THEM.
CO2 - correct answer ✔CARBON DIOXIDE
DI MEANS 2 AND IT IS ONE OF TWO MAIN PRODUCTS OF COMPLETE
COMBUSTION OF A HYDROCARBON WITH THE OTHER BEING WATER
VAPOR.
CO - correct answer ✔CARBON MONOXIDE