CSA B51 Boiler Code: Low-Water Fuel Cut-Off Devices Quiz
Test your knowledge of the requirements for low-water fuel cut-off devices in steam boilers according to CSA B51 Boiler, Pressure Vessel, and Pressure Piping Code. This quiz covers the regulations outlined in CSA-B51 6.3.2.1.
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CSA B51 Boiler Code: Low-Water Fuel Cut-Off Devices Quiz
Quiz • 25 Questions
Study Notes
3 min • Summary
Materials
List of Questions25 questions
- Question 1
- At least four low-water fuel cut-off devices
- At least one low-water fuel cut-off device
- At least two low-water fuel cut-off devices
- At least three low-water fuel cut-off devices
- Question 2
- No valves or switches may be installed that interfere with the operation of the control
- Switches may be installed that render the cut-off inoperable
- Valves may be installed on the low water cut-off piping
- Devices can be tested under operational conditions
- Question 3
- To conserve energy
- To reduce maintenance costs
- To prevent negative consequences for plant operations
- To meet environmental regulations
- Question 4
- Thermostat
- Momentary contact switch
- Pressure regulator
- Valve
- Question 5
- Bypass valve
- Pressure relief valve
- Pushbutton switch
- Pressure gauge
- Question 6
- At least two
- At least four
- At least one
- At least three
- Question 7
- Increased energy efficiency
- Positive impact on plant operations
- Negative impact on plant operations
- Reduced boiler maintenance costs
- Question 8
- Switches
- Thermostats
- Valves
- Pressure gauges
- Question 9
- To be installed at the steam outlet
- To be installed at the cold water inlet
- To be installed at the hot water outlet
- To be installed at the boiler exhaust
- Question 10
- By considering only steam output
- By specifying a minimum capacity
- By not defining capacity
- By considering only hot water output
- Question 11
- Testing should involve disconnecting the cut-off devices
- Testing should not render the device inoperable
- Testing should be done without any means of isolation
- Testing should involve draining the entire system
- Question 12
- To prevent plugging of both cut-offs simultaneously
- To allow for faster startup of the boiler
- To reduce the number of required cut-off devices
- To lower the overall maintenance cost
- Question 13
- Below the lowest safe permissible water level
- In a separate chamber disconnected from the boiler
- Above the lowest safe permissible water level
- At the same level as the lowest visible part of the gage glass
- Question 14
- Frequent testing with no specific guidelines
- Recommended testing frequencies and procedures are provided
- Annual testing only for all types of boilers
- Testing every 5 years for heating boilers and every 2 years for power boilers
- Question 15
- To ensure separate steam connections for each cutoff device
- To reduce installation costs
- To facilitate internal inspection and cleaning
- To allow for easier access during routine maintenance
- Question 16
- The water connection must be sealed permanently
- 'Test and check' valves cannot be used
- 'Test and check' valves must be installed
- Both cut-offs will need to be replaced annually
- Question 17
- 'One cut-off control shall be set to function ahead of the other' is just a recommendation with no specific purpose
- To ensure that both controls function simultaneously
- To prevent overloading of the control system
- 'One cut-off control shall be set to function ahead of the other' is not a valid requirement
- Question 18
- They must be equipped with a low-water fuel cut-off device that can be tested under operational conditions.
- They are exempt from the low water cut-off requirements.
- They must be equipped with a flow-sensing device to automatically cut off the fuel supply if the flow rate is reduced.
- They must have a pressure and/or temperature controls and an automatic low-water fuel cutoff.
- Question 19
- Low water cut-offs are required on some electric boilers but not on fuel-fired or waste heat fired boilers.
- Low water cut-offs are required on electric boilers only.
- Low water cut-offs are required on all types of boilers.
- Low water cut-offs are not required on any type of boilers.
- Question 20
- A single low-water fuel cutoff is recommended.
- Two independent low water cut-offs are recommended.
- A flow-sensing device is recommended.
- No low water cut-offs are required.
- Question 21
- Each module should have a low water cutoff.
- Each module does not require any automatic safety devices.
- Each module should have a flow-sensing device.
- Each module should have a pressure and/or temperature controls.
- Question 22
- To allow for easy cleaning and maintenance of the boiler system.
- To prevent the system from draining while testing the low water cut-off.
- To regulate the pressure inside the boiler.
- To increase the flow rate of water through the connecting piping and float chamber.
- Question 23
- Shutoff valves of any type shall not be placed in such pipe.
- Shutoff valves can be placed at every right angle turn to facilitate cleaning.
- Shutoff valves are allowed in the interconnecting piping of the LWCO.
- No restrictions are imposed on shutoff valves in the interconnecting piping of the LWCO.
- Question 24
- They are exempt from the low water cut-off requirements.
- They must have a pressure and/or temperature controls and an automatic low-water fuel cutoff.
- They must have a low-water fuel cut-off device that can be tested under operational conditions.
- They must be equipped with a flow-sensing device to automatically cut off the fuel supply if the flow rate is reduced.
- Question 25
- They are exempt from having any automatic safety devices.
- They must be equipped with an automatic low-water cutoff on each boiler pressure vessel.