Hot Water Boiler Operation Quiz

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What is the acceptable color for a light fuel oil flame?

Bright orange with yellow at the tips of the flame

Bright yellow with orange at the tips of the flame (correct)

Blue with orange at the tips of the flame

Predominantly blue

What could cause a smoky flame in an oil firing system?

Low fuel temperature

Incorrect fuel-air ratio

Dirty burner nozzle

All of the above (correct)

What may be indicated by a gradual increase in stack temperature?

Heat transfer efficiency is decreasing (correct)

No specific indication

Fireside or waterside cleaning is required

Heating surfaces are clean

What should be done if there is an excessive temperature rise in the flue gases?

Flue gas analysis and excess air adjustment Signup and view all the answers

What is over-firing in the context of boilers?

More heat production than the boiler is designed to transfer Signup and view all the answers

Why should the hot water set point not be below 75°C in non-condensing boilers?

To prevent flue gas condensation Signup and view all the answers

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

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

What are some routine checks for hot water heating boilers?

Monitoring the water pressure and flame condition Signup and view all the answers

What does it mean for a hot water boiler to be fully automatic?

It starts, maintains hot water at set point, and stops without operator intervention Signup and view all the answers

What does the burner programmed combustion control do?

Sequences the operation of the burner and maintains safe and efficient operation Signup and view all the answers

What are some of the daily routine procedures for operators of hot water boilers?

Observing the condition of the burner flame and inspecting water pressure 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 is the consequence of minor water losses in an upfeed heating system?

The operation of the boiler is not affected, but the upper floors of the building will be cold. Signup and view all the answers

What may be a worthwhile investment for a heating system equipped with an automatic make-up valve?

Installing a water meter in the make-up line Signup and view all the answers

What can happen if an expansion tank is full and the piping system cannot accommodate the increase in water volume when the boiler fires?

The safety valve opens and discharges water repeatedly. Signup and view all the answers

How should bladder-style expansion tanks be checked for air charge?

Use a tire pressure gauge to read the tank pressure and adjust as needed. Signup and view all the answers

What can be a common source of air leaks in conventional air cushion expansion tanks?

Old and brittle gauge glass gaskets Signup and view all the answers

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

Additional treatment chemical Signup and view all the answers

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

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

What is a good practice to reduce the need for internal water treatment?

Restricting blowoff and blowdown Signup and view all the answers