Burner Management Systems Quiz

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What is a key feature of programming controllers that distinguishes them from primary controls?

Internal programming (correct)

Custom configuration

Combustion air proving switch

Pre-ignition interlock circuitry

Why are pre-ignition interlocks important in burner systems?

To control the low-fire position circuitry

To ensure the pilot burner is lit

To prevent unsafe conditions during pre-purge (correct)

To regulate the airflow in the furnace

What is the purpose of purge proving circuitry in programming controllers?

To ignite the pilot burner

To control the low-fire position circuitry

To prevent accumulation of combustible gases (correct)

To initiate the pre-purge process

Why were modern programming controllers designed to be electronic devices?

To prevent dangerous conditions from bypassing sequences Signup and view all the answers

What role does low-fire position circuitry play in a burner system?

Ensuring proper air-to-fuel ratio Signup and view all the answers

Why do modern programming controllers have fixed tamper-proof sequence timers?

To prevent dangerous conditions by altering sequences Signup and view all the answers

What is the main purpose of a burner management system according to NFPA 85?

Ensure safe operation of fuel preparation and burning equipment. Signup and view all the answers

What is NOT a function of a burner management system?

Increase the customizability of burner safety parameters. Signup and view all the answers

Which safety controls communicate with the BMS to ensure safe burner operation?

Igniters, combustion air switches, and pilot SSOVs. Signup and view all the answers

According to Factory Mutual (FM), what can operators customize in a burner management system?

Safety parameters like purge, ignition trial, and flame failure response time. Signup and view all the answers

What defines the unsafe conditions that a burner management system aims to prevent during burner operation?

Unsafe operating conditions primarily associated with burner operation. Signup and view all the answers

How does a burner management system assist in reliable light off and shutdown?

By operating combustion equipment in the correct sequence. Signup and view all the answers

What is the main purpose of Burner Management Systems (BMS)?

To monitor, control, diagnose, and maintain fuel burning equipment Signup and view all the answers

Which category of burner management systems is the most complex?

Programming Control Signup and view all the answers

What is the purpose of a safe start check in primary controls?

To prevent the start sequence if a flame is present during off-cycle Signup and view all the answers

What does the primary control do during the timed ignition period?

Times the pilot ignition and turns off if it takes too long Signup and view all the answers

Why is there a limit on the pilot trial for ignition period according to CSA B149.3?

To ensure safety in case of unstable pilot flames Signup and view all the answers

What is the main purpose of interlock circuitry for fuel safety shutoff valves in burner systems?

To ensure safe operation by shutting off fuel based on specific conditions Signup and view all the answers

Why is a flame failure response time important in primary controls?

To ensure a quick shutdown in case of flame failures Signup and view all the answers

In what situation does a primary control go to safety shutdown and lockout during the pilot trial for ignition period?

If the pilot flame is unstable or fails during this trial period Signup and view all the answers

What function does a flame relay primarily serve in a burner management system?

Detect the existence of a flame Signup and view all the answers

When does a primary control maintain both pilot and main flame after ignition?

After a successful main flame trial-for-ignition period Signup and view all the answers