6 questions Intermediate

ECADEMY test

1 - Life Cycle Cost

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Question 4 of 6 Intermediate

What is the average payback time of installing a system with variable speed pumps?

Question 6 of 6 Intermediate

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Correct
Q: In which systems can the calculated proportional differential pressure mode be used?
A: In systems where measurement of the differential pressure in the system is not an option and where the valve authority is below 50%
Correct
Q: What are the three most important factors for a life cycle cost calculation for commercial buildings?
A: Initial cost, maintenance cost and energy cost
Correct
Q: In which systems can the measured proportional differential pressure used?
A: Systems where the differential pressure is measured in the system and the valve authority is below 50%
Correct
Q: What is the average payback time of installing a system with variable speed pumps?
A: 1-2 years
Correct
Q: In which types of systems is the constant pressure mode used?
A: Systems where the valve authority is higher that 50% of the total pressure loss
Correct
Q: In the case story, which system is the most expensive?
A: A system with constant flow and a single constant speed pump