Question 188Motor Plants - 1st Asst/Chief

The correct answer is A) a burned out solenoid in the oil supply valve. If the solenoid in the oil supply valve fails, the automatic burner ignition will be unable to light the burner, resulting in a burner ignition failure. This is because the solenoid controls the flow of oil to the burner, and without a functioning solenoid, the burner will not receive the necessary fuel to ignite. The other answer choices are incorrect because they do not directly relate to the root cause of a burner ignition failure in an automatically fired auxiliary boiler. High temperature excess air (B), incorrectly setting the hotwell dump valve (C), and an incorrectly positioned burner snubber relay (D) would not directly cause the burner ignition to fail.