Hot Water Boiler Operation Checks Quiz

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What is the acceptable color of a natural gas flame?

Dark red

Mostly blue with some unavoidable orange at the tips (correct)

Bright yellow

Predominantly orange

What does a white plume in the chimney indicate about the combustion process?

The presence of water vapour is harmful and indicates an increase in fuel temperature

The presence of water vapour is a problem and indicates inefficiency

The presence of water vapour is normal and insignificant (correct)

The presence of water vapour is harmful and indicates incomplete combustion

What does a high flue gas temperature indicate?

Improvement in heat transfer efficiency

Reduction in boiler efficiency (correct)

Reduction in excess air

Cleaning of heat transfer surfaces

What is the main reason for regular checks of hot water heating boilers?

To verify safe and efficient function during unsupervised periods Signup and view all the answers

What is included in routine boiler checks?

Pressure, temperature, flame condition, and stack temperature Signup and view all the answers

What is the purpose of tracking the stack temperature?

To identify fouling of heating surfaces and decreasing heat transfer efficiency Signup and view all the answers

What is the recommended maximum boiler water temperature for hot water heating boilers?

$120°C$ Signup and view all the answers

What does 'fully automatic' mean in the context of hot water boilers?

They start, maintain, and stop without operator intervention Signup and view all the answers

What is the purpose of burner programmed combustion control?

To maintain safe and efficient burner operation Signup and view all the answers

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 Signup and view all the answers

Why do hot water boilers still need regular attention despite their automatic systems?

To ensure safe and dependable operation Signup and view all the answers

What should operators observe in the condition of the burner flame during daily routine procedures?

Bright and symmetrical flame Signup and view all the answers

What is a common cause of water loss from a hot water heating system?

Lack of expansion volume in the expansion tank Signup and view all the answers

What can happen if the expansion tank is full in a hot water heating system?

Water, heat, and chemical wastage Signup and view all the answers

How can the air charge in a bladder-style expansion tank be checked?

Using a tire pressure gauge Signup and view all the answers

What may happen if the tank pressure does not increase when adding air to a bladder-style expansion tank?

The bladder may be damaged Signup and view all the answers

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 Signup and view all the answers

What is required for hot water heating systems that have had major leaks or equipment replacement?

Additional treatment chemical Signup and view all the answers

Under what circumstances are hot water heating boilers blown off or blown down?

To drain boilers for structural repair or waterside inspection Signup and view all the answers

What reduces the need for internal water treatment in hot water heating systems?

'Blowoff' and 'blowdown' procedures Signup and view all the answers