Burner Systems Quiz

An upshot burner directs fuel in which direction from the burner ports?

• Horizontally

• Vertically upward

• Downward

• At a 45° angle

What is the primary use for inshot burners?

• High-pressure applications only

• Vertical fuel discharge

• Low-pressure applications with horizontal fuel discharge

• Ignition of multiple burner units

A fan-assisted burner typically uses which type of burner for heat exchanger designs?

• Closed burner

• Inshot burner

• Upshot burner

• Blast burner

The crossover burner in an upshot burner system is used to:

• Increase flame size

• Reduce fuel consumption

• Ignite additional burners in a manifold setup

• Regulate gas pressure

What is the role of an induced draft fan in a furnace?

• Force air into the combustion chamber

• Draw combustion gases through the heat exchanger

• Cool the burner ports

• Control pilot flame size

Fan speed in modern appliances is adjusted to match:

• Ambient temperature

• Burner type only

• Heating requirements

• Appliance size

What is the purpose of staging in a two-stage furnace?

• Reduce fuel consumption

• Provide multiple heating levels based on demand

• Ensure constant blower speed

• Improve ignition timing

The term 'turndown ratio' in burners refers to:

• The ability to reduce fan speed

• The range of firing rates a burner can handle

• The number of burners in a system

• The pressure at the burner ports

In a fan-assisted system, fuel is injected to the burner throat using:

• Atmospheric pressure only

• High-pressure injectors

• A manifold and venturi action

• Direct flame injection

A high limit switch in fan-assisted furnaces prevents:

• Overcooling

• Overheating of the heat exchanger

• Flame rollout

• Pilot flame extinguishment