30 Questions
What is the purpose of performing low water cut-off tests in heating boiler and power boiler service?
To check if the boiler shuts off rapidly when the float chamber is drained
What are the recommended test methods for low water cut-offs in heating boiler and power boiler service?
Isolating the feedwater and blowing off the boiler
What is the role of the operator in addressing a low water condition in a boiler?
Determine the cause of the low water condition and correct it before restarting the boiler
Where can one find information about low water cut-off tests and frequencies in heating boiler and power boiler service?
Part B, Unit 4, Chapter 4 Operational Checks
According to CSA B51 6.3.2.1, how many low-water fuel cut-off devices should steam boilers not continuously attended by a certified operator be equipped with?
At least two low-water fuel cut-off devices
What does the statement 'cannot be rendered inoperative' mean in the context of low water cut-off devices?
Devices should be installed so that they cannot be made inactive
Why may momentary contact switch be installed in parallel to the low water cut-off switch for large capacity boilers?
To avoid the need for continuous operation of the boiler
What takes precedence over the ASME codes in Canada regarding boilers and pressure vessels?
CSA B51 Boiler, Pressure Vessel, and Pressure Piping Code
Why should no switches be installed that render the low water cut-off inoperable according to CSA B51 6.3.2.1?
To ensure safety and prevent accidents
What is required for large capacity boilers according to CSA B51 6.3.2.1?
Continuous operation without any breaks
What is the minimum heat input, in Btu/hr, that requires a flow-sensing device in a coil-type boiler or a watertube boiler?
400,000 Btu/hr
In which jurisdictional code are the flow-sensing device requirements similar to those in CSA B51?
ASME CSD-1
What is the capacity (in boiler horsepower output) for boilers that ASME CSD-1 addresses?
Up to 300 boiler horsepower output
How many automatic low-water fuel cutoffs are required for each automatically fired, low-pressure steam boiler according to ASME CSD-1 Part CW120?
Two
Where should the low-water fuel cutoff be located for hot-water boilers as per ASME CSD-1 Part CW-130?
Above the lowest safe permissible water level
What must be avoided when connecting cut-off devices to a water column for high-pressure steam boilers according to ASME CSD-1 Part CW-140?
Common water connection
What is the main purpose of a low-water fuel cutoff for hot-water heating boilers as per ASME CSD-1 Part CW-130?
To prevent startup and cut off the boiler fuel supply automatically
What is the requirement for a means of testing the low-water cut-offs of hot water boilers according to Part HG-614?
Resorting to draining the entire system
What is the minimum capacity defined for a boiler in CSA B51?
It does not specify a minimum capacity
What is required to be installed at the hot water outlet according to CSA B51?
Flow-sensing device
What does ASME CSD-1 address?
Automatically fired boilers with capacities up to 300 boiler horsepower output
According to CSA-B51 6.3.2.2, which statement about low-water fuel cut-off devices for hot water boilers is true?
They should be installed so that they can be tested under operational conditions.
According to ASME BPVC I, what is the requirement for low water fuel cut-off devices on fuel-fired or waste heat fired boilers?
Not required on fuel-fired or waste heat fired boilers but required on electric boilers.
Under what conditions may some hot water boilers be exempted from low-water fuel cut-off device requirements according to CSA B51 6.2.2.3?
If they use forced circulation to prevent overheating.
Under what circumstance does ASME BPVC I permit the use of a low water cut-off as an alternative to a secondary means of feeding water?
Only for boilers that are not fired by gaseous, liquid, or solid fuels in suspension.
What is the requirement for electric boilers of the resistance element type according to ASME BPVC I?
To be equipped with an automatic low-water cut-off and pressure and/or temperature controls.
What is the requirement for heating surface area in ASME BPVC I regarding the number of means of feeding water?
To have two means of feeding water for boilers with more than 47 m2 (500 ft2) of heating surface area.
What does ASME BPVC IV prohibit regarding the installation of low-water fuel cut-off devices in the interconnecting piping?
The installation of shutoff valves in the interconnecting piping.
What does ASME BPVC IV require regarding the location of the automatic low-water fuel cutoff in steam heating boilers?
To be located above the highest visible part of the water gage glass.
What is recommended by ASME VII regarding operating procedures when an automatic low water boiler trip is equipped with a water column?
To develop suitable operating procedures to prevent tripping the boiler while determining if the water column is functional and in good operating condition.
Test your knowledge of the rules for forced circulation coil-tube boilers, including the requirement for a flow-sensing device and automatic fuel supply cutoff. This quiz covers the regulations outlined in part HG-614 and the similarities to CSA B51.
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