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

A combustion analyzer measures flue gas constituents such as O2, CO, and CO2 to calculate appliance efficiency and identify unsafe combustion conditions.

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

Incomplete combustion, often caused by insufficient combustion air or a cracked heat exchanger, is the primary source of elevated CO in gas furnaces.

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

400 ppm CO in flue gases signals seriously incomplete combustion; BPI standards require the analyst to shut down the appliance and notify the client.

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

A spillage test, typically performed with a smoke pencil or mirror, confirms that flue gases draft correctly up the vent rather than spilling into conditioned space.

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

A CAZ depressurization test uses a blower door to simulate worst-case house pressures and determine if backdrafting of combustion appliances can occur.

(BAP) Building Analyst Professional Practice Test

(BAP) Building Analyst Professional Practice Test

BAP BAP Combustion & Mechanical Systems