Nora 5, 10, 11, 12 questions with complete solutions passed

Nora 5, 10, 11, 12 questions with
complete solutions passed

What are the three main functions of a primary control - correct answer ✔✔ To respond to the
thermostat, to respond to the limit control, to control the startup, run cycle and shutdown the
burner



The primary control won't allow the burner to start if ____ is present - correct answer ✔✔ A
flame



What are the two types of ignition modes - correct answer ✔✔ Intermittent duty ignition



A cad cell eye ____ resistance in the presence of light - correct answer ✔✔ Low



When should a primary control should be tested for safety function - correct answer ✔✔ On
every service call



Modern primary controls have adjustable ___ and ____ times - correct answer ✔✔ Motor off
delay and valve on delay



What does limited reset prevent - correct answer ✔✔ The repeated pressing of the reset button
which flood the chamber with fuel



Using a control with recycle, the burner will ___ on a loss of flame - correct answer ✔✔ Restart



Motor off delay is sometimes referred to as ____ - correct answer ✔✔ Post purge