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Questions and Answers
What is the purpose of having multiple boilers in larger steam systems?
What is the purpose of having multiple boilers in larger steam systems?
- To decrease the thermal capacity
- To reduce the pressure in the steam headers
- To ensure additional capacity is available on standby (correct)
- To increase the overall heating efficiency
In a high-pressure steam plant, how are the headers identified?
In a high-pressure steam plant, how are the headers identified?
- By the temperature at which they operate
- By the pressures at which they operate (correct)
- By the steam flow rate through them
- By the materials used in their construction
What could happen if the headers are not properly warmed up in a steam system?
What could happen if the headers are not properly warmed up in a steam system?
- Severe water hammer occurrence (correct)
- Increased heating efficiency
- Reduced condensate formation
- Improved boiler firing from cold
Why do headers and the piping need to be properly warmed up in steam systems?
Why do headers and the piping need to be properly warmed up in steam systems?
How are the different headers connected in sequence in a steam system?
How are the different headers connected in sequence in a steam system?
What is the purpose of having a 2500 kPa header in a high-pressure steam plant?
What is the purpose of having a 2500 kPa header in a high-pressure steam plant?
What is the purpose of opening all drain valves at all system low points during the warm-up of steam headers?
What is the purpose of opening all drain valves at all system low points during the warm-up of steam headers?
Why is it important to be familiar with the steam heating system prior to cutting in additional heating boilers?
Why is it important to be familiar with the steam heating system prior to cutting in additional heating boilers?
When placing a steam heating boiler on line with other heating boilers that are already in service, what should be done first?
When placing a steam heating boiler on line with other heating boilers that are already in service, what should be done first?
What is the purpose of having a double block and bleed arrangement when multiple power boilers with manholes are connected to a common steam header?
What is the purpose of having a double block and bleed arrangement when multiple power boilers with manholes are connected to a common steam header?
In which situation is it treated exactly like the warm-up procedure for a single steam boiler plant?
In which situation is it treated exactly like the warm-up procedure for a single steam boiler plant?
What is the purpose of opening the drain on the non-return valve and slightly opening the header valve for Boiler A during warming up?
What is the purpose of opening the drain on the non-return valve and slightly opening the header valve for Boiler A during warming up?
What is the purpose of step 4 in warming the steam line to Boiler 2?
What is the purpose of step 4 in warming the steam line to Boiler 2?
How can a flow of steam be maintained to keep the steam line warm after it's fully up to pressure and temperature?
How can a flow of steam be maintained to keep the steam line warm after it's fully up to pressure and temperature?
In the context of cutting in a boiler with non-return valves, what is the purpose of initially restricting the opening of the non-return valve?
In the context of cutting in a boiler with non-return valves, what is the purpose of initially restricting the opening of the non-return valve?
What should be done when the steam line pressure from Boiler 2 equals the steam header pressure, according to Method One for cutting in a boiler?
What should be done when the steam line pressure from Boiler 2 equals the steam header pressure, according to Method One for cutting in a boiler?
What should be done when the pressure in the boiler steam line and the boiler are approximately equal in a boiler without non-return valves?
What should be done when the pressure in the boiler steam line and the boiler are approximately equal in a boiler without non-return valves?
What should be done if a non-return valve sticks in the closed position?
What should be done if a non-return valve sticks in the closed position?
What is referred to as the base-loaded boiler when multiple boilers are on line and operating in automatic firing mode?
What is referred to as the base-loaded boiler when multiple boilers are on line and operating in automatic firing mode?
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