G2 Gas Fitter Practice Exam 2025 - Free Gas Fitter Practice Questions and Study Guide

Question: 1 / 400

What is the normal drop-out reading of a thermocouple flame sensor?

0-1 mV

2-4 mV

The normal drop-out reading of a thermocouple flame sensor is typically found within the range of 2-4 mV. This reading is crucial for the safe operation of gas appliances, as it indicates whether the sensor is able to detect the presence of a flame. A reading within this range suggests that the sensor is functioning properly, providing a sufficient voltage signal when a flame is present to maintain the operation of safety mechanisms, such as the gas valve.

When the voltage falls below this range, it may indicate an issue with the flame or sensor, leading to the gas valve closing to prevent unsafe conditions. Understanding the normal operational range of the thermocouple is essential for diagnosing problems in gas appliances and ensuring that the safety measures are effective. This knowledge helps gas fitters maintain compliance with safety standards and prevent potential hazards in gas systems.

Get further explanation with Examzify DeepDiveBeta

5-10 mV

10-15 mV

Next Question

Report this question

Download G2 Gas Fitter Practice Exam PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy