1
What is the aim of thrust-to-power sizing?
2
What are deadzones?
3
Which of these isn’t a main target for wastewater mixers?
4
What is the main purpose of a closed loop tank?
5
Why is it important to position mixers correctly?
6
How did the Stargard project redesign the layout of mixers in the tank?
Test results
Congratulations. You have passed the test and completed the Mixing in Wastewater Treatment
Achieved badges:
01.
Q: What is the aim of thrust-to-power sizing?
A: Maintain a steady momentum and a constant required thrust rate
01.
Q: What is the aim of thrust-to-power sizing?
A: Deliver a sufficient thrust with the least possible energy consumption
01.
Q: What is the aim of thrust-to-power sizing?
A: Run the power at the limit to deliver maximum thrust when necessary
02.
Q: What are deadzones?
A: Areas that are compromised during the mixing process
02.
Q: What are deadzones?
A: Areas consisting of infected water
02.
Q: What are deadzones?
A: Areas in which the homogeneity is high
03.
Q: Which of these isn’t a main target for wastewater mixers?
A: To blend liquid with solid particles
03.
Q: Which of these isn’t a main target for wastewater mixers?
A: To ensure quick drainage from the tank
03.
Q: Which of these isn’t a main target for wastewater mixers?
A: To keep solid particles in suspension
04.
Q: What is the main purpose of a closed loop tank?
A: To create a steady, circulated flow
04.
Q: What is the main purpose of a closed loop tank?
A: To ensure a more energy-efficient solution
04.
Q: What is the main purpose of a closed loop tank?
A: To prevent damaging backflow
05.
Q: Why is it important to position mixers correctly?
A: To prevent the propellers from breaking
05.
Q: Why is it important to position mixers correctly?
A: To neutralise vortices
05.
Q: Why is it important to position mixers correctly?
A: To maximise the total bulk flow
06.
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They gathered four mixers in the middle of the tank
06.
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They spread four mixers across the tank
06.
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They remained in the same position, but were replaced with more powerful mixers