Class 5 Boiler Practice Exam

True or False: Low and high pressure gas switches are required on boilers of 12.5 mbtu and greater.

1. True

2. False

3. Depends on the type of boiler

4. Not specified

The correct answer is: True

Low and high pressure gas switches are indeed required on boilers with a capacity of 12.5 MBTU (million British Thermal Units) and greater. This requirement is established to ensure safety in the operation of the boiler. These switches serve as vital safety devices that help to monitor and control the gas pressure supplied to the burner. When the gas pressure drops too low, the low pressure switch will turn off the gas supply, preventing the boiler from running in unsafe conditions which could lead to improper combustion or even hazardous situations. Conversely, if the gas pressure exceeds a certain safe threshold, the high pressure switch will kick in to shut the system down to avoid potentially damaging effects from excessive pressure. The requirement for these switches is part of the broader safety regulations governing boiler operations, particularly in commercial and industrial settings, where the potential risks associated with high-capacity boilers necessitate strict adherence to safety protocols. Hence, understanding the role of these gas switches is crucial for maintaining a safe operating environment in high-capacity boiler systems.