6 questions Advanced

ECADEMY test

27 - Boiler systems

This course test contains 6 questions and can be retaken at any time.

You must answer all questions correctly to pass the test and complete the course.

Start test

Question 5 of 6 Advanced

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

Question 6 of 6 Advanced

Happy with your answers?

Submit your current answers and get the final test result.

Submit

Test results

Congratulations. You have passed the test and completed the 27 - Boiler systems

Achieved badges:

How would you rate this course?

You are welcome to add your rating of this course. Remember that you have to be logged in before you take the test to be able to give your rating.

Continue training Go to MyECADEMY

Sorry. You did not pass the 27 - Boiler systems test this time

How would you rate this course?

You are welcome to add your rating of this course. Remember that you have to be logged in before you take the test to be able to give your rating.

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: Why are feed valves problematic?
A: Valves cause pressure loss, which increases energy consumption and requires larger pumps
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.
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 typical payback time of installing an economiser in a boiler system?
A: Less than two years.
Correct
Q: What is direct boiler feed?
A: Variable speed pumps equipped with level sensors to control the water level