BUILDING ANALYST PRACTICE QUESTIONS UPDATED
QUESTIONS AND ANSWERS
Calculating BAS (Building Airflow Standard) - CORRECT ANSWER✅✅✅1) Calculate BAS based on
Volume, then 2) calculate based on Occupancy, then 3) Take the higher of the two standards
One inch of Water Column - CORRECT ANSWER✅✅✅250 Pascals
3 Forms of Heat Transfer - CORRECT ANSWER✅✅✅Convection, Conduction, Radiation
How Many BTUs in 1 kWh? - CORRECT ANSWER✅✅✅3412
How many BTUS in 1 Therm of Gas - CORRECT ANSWER✅✅✅100,000
Heat Load - CORRECT ANSWER✅✅✅Used to measure appliance capacity
Heat Loss - CORRECT ANSWER✅✅✅Total Seasonal Heat Loss
CFM50 - CORRECT ANSWER✅✅✅CFMn*NC
NC - CORRECT ANSWER✅✅✅"N" Correction factor from LBL charts
Occupancy BAS - CORRECT ANSWER✅✅✅Required Airflow = 15 cfm * # of occupants
Volume BAS - CORRECT ANSWER✅✅✅.35 * Volume/60
CO >35 ppm - CORRECT ANSWER✅✅✅1) Disable appliance 2)Repair before proceeding
AFUE - CORRECT ANSWER✅✅✅Annual Fuel Utilization Efficiency
,AFUE (Annual Fuel Utilization Efficiency) - CORRECT ANSWER✅✅✅Efficiency of unit in operation
(with starts/stops) UNIT ONLY
Seasonal Efficiency - CORRECT ANSWER✅✅✅TOTAL system efficiency. AFUE PLUS distrib losses,
average over course of heatin season
5 minutes - CORRECT ANSWER✅✅✅Length of time that a combustion appliance should run to
achieve"Steady State Efficiency"
120 Seconds - CORRECT ANSWER✅✅✅Amount of permissible time after ignition that spillage is
allowable from the flue.
Backdrafting - CORRECT ANSWER✅✅✅Continuous Spillage
"Draft Measurement" is done in both Category I and IV heating systems. - CORRECT
ANSWER✅✅✅False
Category I includes natural draft and fan assisted draft - CORRECT ANSWER✅✅✅True
Category IV includes Sealed combustion and Fan Induced draft - CORRECT ANSWER✅✅✅False
Category IV includes "Power vented" and "sealed combustion" - CORRECT ANSWER✅✅✅True
Category I vents, under normal conditions, will have NEGATIVE draft pressure - CORRECT
ANSWER✅✅✅True
Category IV vents, under normal conditions, will have POSITIVE pressure - CORRECT
ANSWER✅✅✅True
, What is the order of testing when a chimney is shared by mutiple appliances? - CORRECT
ANSWER✅✅✅Smallest BTU input rating to highest
Draft heating should always be checked for spillage at the base of the chimney liner or flue - CORRECT
ANSWER✅✅✅True
Vent draft pressure should be measured before the appliance reaches steady state. - CORRECT
ANSWER✅✅✅False
CAZ - CORRECT ANSWER✅✅✅Combustion Appliance Zone
Combustion - CORRECT ANSWER✅✅✅chemical reaction that involves the combination of a fuel
with oxygen
3 Elements required for combustion - CORRECT ANSWER✅✅✅Fuel, Oxygen, Heat
Draft - CORRECT ANSWER✅✅✅Movement of combusion by-products through the flue and out of
the building
Combustion by-products - CORRECT ANSWER✅✅✅Heat, Light, Nitrogen Oxides (NOx), Water/vapor,
Carbon Dioxide, Carbon MONOxide
Carbon Monoxide - CORRECT ANSWER✅✅✅Colorless, odorless, tasteless and DEADLY-is the result
of incomplete combustion
Methods to differentiate Heating Systems - CORRECT ANSWER✅✅✅Fuel type, Distribution type,
Vent design and General Condition
Furnace - CORRECT ANSWER✅✅✅Used in forced hot air system
Boiler - CORRECT ANSWER✅✅✅Used in hydronic and steam systems
QUESTIONS AND ANSWERS
Calculating BAS (Building Airflow Standard) - CORRECT ANSWER✅✅✅1) Calculate BAS based on
Volume, then 2) calculate based on Occupancy, then 3) Take the higher of the two standards
One inch of Water Column - CORRECT ANSWER✅✅✅250 Pascals
3 Forms of Heat Transfer - CORRECT ANSWER✅✅✅Convection, Conduction, Radiation
How Many BTUs in 1 kWh? - CORRECT ANSWER✅✅✅3412
How many BTUS in 1 Therm of Gas - CORRECT ANSWER✅✅✅100,000
Heat Load - CORRECT ANSWER✅✅✅Used to measure appliance capacity
Heat Loss - CORRECT ANSWER✅✅✅Total Seasonal Heat Loss
CFM50 - CORRECT ANSWER✅✅✅CFMn*NC
NC - CORRECT ANSWER✅✅✅"N" Correction factor from LBL charts
Occupancy BAS - CORRECT ANSWER✅✅✅Required Airflow = 15 cfm * # of occupants
Volume BAS - CORRECT ANSWER✅✅✅.35 * Volume/60
CO >35 ppm - CORRECT ANSWER✅✅✅1) Disable appliance 2)Repair before proceeding
AFUE - CORRECT ANSWER✅✅✅Annual Fuel Utilization Efficiency
,AFUE (Annual Fuel Utilization Efficiency) - CORRECT ANSWER✅✅✅Efficiency of unit in operation
(with starts/stops) UNIT ONLY
Seasonal Efficiency - CORRECT ANSWER✅✅✅TOTAL system efficiency. AFUE PLUS distrib losses,
average over course of heatin season
5 minutes - CORRECT ANSWER✅✅✅Length of time that a combustion appliance should run to
achieve"Steady State Efficiency"
120 Seconds - CORRECT ANSWER✅✅✅Amount of permissible time after ignition that spillage is
allowable from the flue.
Backdrafting - CORRECT ANSWER✅✅✅Continuous Spillage
"Draft Measurement" is done in both Category I and IV heating systems. - CORRECT
ANSWER✅✅✅False
Category I includes natural draft and fan assisted draft - CORRECT ANSWER✅✅✅True
Category IV includes Sealed combustion and Fan Induced draft - CORRECT ANSWER✅✅✅False
Category IV includes "Power vented" and "sealed combustion" - CORRECT ANSWER✅✅✅True
Category I vents, under normal conditions, will have NEGATIVE draft pressure - CORRECT
ANSWER✅✅✅True
Category IV vents, under normal conditions, will have POSITIVE pressure - CORRECT
ANSWER✅✅✅True
, What is the order of testing when a chimney is shared by mutiple appliances? - CORRECT
ANSWER✅✅✅Smallest BTU input rating to highest
Draft heating should always be checked for spillage at the base of the chimney liner or flue - CORRECT
ANSWER✅✅✅True
Vent draft pressure should be measured before the appliance reaches steady state. - CORRECT
ANSWER✅✅✅False
CAZ - CORRECT ANSWER✅✅✅Combustion Appliance Zone
Combustion - CORRECT ANSWER✅✅✅chemical reaction that involves the combination of a fuel
with oxygen
3 Elements required for combustion - CORRECT ANSWER✅✅✅Fuel, Oxygen, Heat
Draft - CORRECT ANSWER✅✅✅Movement of combusion by-products through the flue and out of
the building
Combustion by-products - CORRECT ANSWER✅✅✅Heat, Light, Nitrogen Oxides (NOx), Water/vapor,
Carbon Dioxide, Carbon MONOxide
Carbon Monoxide - CORRECT ANSWER✅✅✅Colorless, odorless, tasteless and DEADLY-is the result
of incomplete combustion
Methods to differentiate Heating Systems - CORRECT ANSWER✅✅✅Fuel type, Distribution type,
Vent design and General Condition
Furnace - CORRECT ANSWER✅✅✅Used in forced hot air system
Boiler - CORRECT ANSWER✅✅✅Used in hydronic and steam systems
