20 Questions
What is the acceptable color of a natural gas flame?
Mostly blue with some unavoidable orange at the tips
What does a white plume in the chimney indicate about the combustion process?
The presence of water vapour is normal and insignificant
What does a high flue gas temperature indicate?
Reduction in boiler efficiency
What is the main reason for regular checks of hot water heating boilers?
To verify safe and efficient function during unsupervised periods
What is included in routine boiler checks?
Pressure, temperature, flame condition, and stack temperature
What is the purpose of tracking the stack temperature?
To identify fouling of heating surfaces and decreasing heat transfer efficiency
What is the recommended maximum boiler water temperature for hot water heating boilers?
$120°C$
What does 'fully automatic' mean in the context of hot water boilers?
They start, maintain, and stop without operator intervention
What is the purpose of burner programmed combustion control?
To maintain safe and efficient burner operation
What is the purpose of the safety relief valve in low-pressure hot water heating boilers?
To ensure the safety valve stays tightly closed unless required to open
Why do hot water boilers still need regular attention despite their automatic systems?
To ensure safe and dependable operation
What should operators observe in the condition of the burner flame during daily routine procedures?
Bright and symmetrical flame
What is a common cause of water loss from a hot water heating system?
Lack of expansion volume in the expansion tank
What can happen if the expansion tank is full in a hot water heating system?
Water, heat, and chemical wastage
How can the air charge in a bladder-style expansion tank be checked?
Using a tire pressure gauge
What may happen if the tank pressure does not increase when adding air to a bladder-style expansion tank?
The bladder may be damaged
What should be done if a conventional air cushion expansion tank loses air and fills with water?
Renew gauge glass gaskets and check for air leaks
What is required for hot water heating systems that have had major leaks or equipment replacement?
Additional treatment chemical
Under what circumstances are hot water heating boilers blown off or blown down?
To drain boilers for structural repair or waterside inspection
What reduces the need for internal water treatment in hot water heating systems?
'Blowoff' and 'blowdown' procedures
Test your knowledge about the routine checks required for hot water heating boilers, including pressure, temperature, flame condition, pump operation, make-up water supply, and water treatment. Ensure that you understand the importance of maintaining the safety and efficiency of hot water heating boilers during unsupervised periods.
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