B- objective 1

Which ignition system keeps the pilot light off until there is a demand for heat?

• Continuous pilot

• Interrupted pilot

• Intermittent pilot

• Direct spark ignition

In an interrupted pilot ignition system, the pilot light:

• Remains constantly lit

• Turns off once the main burner ignites

• Only lights during maintenance

• Stays on if the main burner is on

The term 'flame rectification' refers to:

• Checking if a flame is extinguished

• Using flame conductivity to detect presence

• Increasing the flame temperature

• Stabilizing flame color

The purpose of a dual-rod pilot burner is to:

• Measure the temperature of the burner

• Control fuel flow to the main burner

• Use one rod to ignite and the other to sense flame

• Limit the duration of ignition

A single-rod pilot burner functions by:

• Using one rod for ignition and flame sensing

• Allowing multiple ignition attempts

• Regulating gas flow only

• Maintaining a constant pilot flame

In a direct spark ignition system:

• A pilot flame ignites first

• Ignition occurs directly at the main burner

• Only a thermocouple is used

• Ignition is achieved via hot surface

Which of the following is a key component in an intermittent pilot ignition system?

• Continuously lit pilot flame

• Flame rectification circuit

• Flame ionization tube

• Main burner only

Hot surface ignition systems work by:

• Igniting a pilot flame before the main burner

• Using a heated surface to ignite the gas directly

• Emitting sparks for ignition

• Using thermocouples for safety

What safety feature in electronic ignition systems shuts off gas flow if no flame is detected?

• Pressure valve

• Flame rectification circuit

• Main burner valve

• Spark generator

A flame sensor detects flame presence through:

• Flame temperature

• Ionization current

• Flame color

• Sound frequency