Practice Free Fall Non-tilting Reversible Mixer (1) - Free Fall Non-Tilting Reversible Mixer

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9 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a free fall mixer?
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Think about how gravity works.
Question 2.
What does a reversible mixer do?
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Consider how it can mix and then empty.
3Question 3.
What type of mixer requires a minimum slump of 50 mm?
- Power mixer
- Free fall mixed
- Both
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Think about the limitations of gravity mixers.
4Question 4.
True or False: Pan mixers use horizontal shafts to facilitate mixing.
- True
- False
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Recall the structure of different mixer types.
Question 5.
A construction site needs to produce 240 m³ of concrete using a power mixer that has a cycle time of 3 minutes. How many hours will it take if the efficiency is 75%?
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Calculate the effective real output based on efficiency and thus the total needed batches.
Question 6.
If a pan mixer has a mixing duration guideline of 5 minutes per batch, but you mixed for only 3 minutes, what issues might arise?
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Think about what mixing does to distribution and uniformity.

5 more questions in this section. Enroll free to practise them all.