6 questions Advanced

ECADEMY test

Boiler systems

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Question 1 of 6 Advanced

1 What is the typical payback time of installing an economiser in a boiler system?

Question 6 of 6 Advanced

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Correct
01.
Q: What is the typical payback time of installing an economiser in a boiler system?
A: Less than two years.
Correct
02.
Q: What is direct boiler feed?
A: Variable speed pumps equipped with level sensors to control the water level
Correct
03.
Q: Why are feed valves problematic?
A: Valves cause pressure loss, which increases energy consumption and requires larger pumps
Correct
04.
Q: Why is chemical treatment of the make-up water necessary?
A: To prevent scaling in the boiler and the water from turning acidic when heated.
Correct
05.
Q: When does cavitation in the feed pumps occur?
A: Cavitation occurs when the pressure in the first impeller or pipes drops below the vapour pressure of the water.
Correct
06.
Q: How does an economiser work?
A: In an economiser flue gas is led past a network of pipes with cold water, transferring heat from the flue gas to the water.