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ECADEMY test

27 - Boiler systems

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Correct
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
Q: What is the main shortcoming of on/off level control?
A: It does not maintain a constant level in the boiler
Correct
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.
Correct
Q: What is the purpose of the condenser?
A: To ensure that no pockets of steam remain in the condensate when returning to the Boiler house.
Correct
Q: What is the purpose of an economiser?
A: To harness the energy of the boiler’s flue gas and reuse it in other parts of the system
Correct
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.