BAP BAP Combustion & Mechanical Systems

Question 1

What is the primary purpose of a combustion analyzer in a building analyst's assessment?

Accepted Answer

To measure flue gas composition and efficiency of combustion appliances

Answer

To detect carbon monoxide in living spaces only

Answer

To measure natural gas pressure at the meter

Answer

To test electrical continuity in HVAC controls

Question 2

Which condition most commonly causes a gas furnace to produce elevated carbon monoxide (CO) levels?

Accepted Answer

Incomplete combustion due to improper air-to-fuel ratio

Answer

Oversized supply ducts

Answer

High static pressure in the return plenum

Answer

Refrigerant leaks in the air handler

Question 3

What does a steady CO reading of 400 ppm in a furnace's flue gases indicate to a BAP analyst?

Accepted Answer

A potentially hazardous combustion problem requiring immediate action

Answer

Normal combustion conditions for an older unit

Answer

Low natural gas pressure at the appliance

Answer

A dirty air filter restricting return airflow

Question 4

What is the purpose of a spillage test on a naturally drafted combustion appliance?

Accepted Answer

To confirm combustion gases are venting properly and not spilling into the living space

Answer

To verify the gas valve opens fully under load

Answer

To measure the BTU output at the burner

Answer

To check for refrigerant leaks near the flue collar

Question 5

Which test is used to determine whether a combustion appliance zone (CAZ) has enough air for safe combustion and venting?

Accepted Answer

Blower door depressurization of the CAZ

Answer

Duct leakage to outside test

Answer

Infrared scan of the heat exchanger

Answer

Manometer reading at the gas meter

Question 6

What is the BPI maximum allowable ambient CO level in a combustion appliance zone before work should stop?

Accepted Answer

35 ppm

Answer

9 ppm

Answer

70 ppm

Answer

100 ppm