MEASURING - 5 - MILKING UNIT_Pulsation

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1. Enter your first and last name

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2. The pulsation rate is typically 40 to 70 ppm for cows, and faster for sheep and goats.

True

False

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3. In alternate pulsation, all four liners of one cluster operate together.

True

False

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4. What determines the total length of the pulsation cycle?

pulsation rate

pulsation ratio

vacuum level at the pulsation chamber

type of pulsation (simultaneous vs. alternate)

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5. What happens to the liner status, pressure in the pulsation chamber, length of dependence, and milk flow during the a-phase?

The liner opens; the pressure in the pulsation chamber is steady; the length depends on the pulsation chamber volume and the length of the long pulse tube; and milk flows slowly

The liner opens; the pressure in the pulsation chamber switches from vacuum to atmosphere; the length depends on the pulsation ratio; the teat is relieved, and milk flows

The liner remains closed; the pressure in the pulsation chamber switches from vacuum to atmosphere; the length depends on the pulsation chamber volume, the length of the long pulse tube, and the size of the pulsator air port; and milk doesn't flow

The liner opens; the pressure in the pulsation chamber switches from atmosphere to vacuum; the length depends on the pulsation chamber volume, the length of the long pulse tube, and the size of pulsator air port; and the milk flow slightly begins.

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6. In the b-phase, there is a milking vacuum at the teat end (inside the liner), the liner is open, the teat canal is open, milk flows out of the teat, and blood flows to the teat end.

True

False

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7. In the b-phase, there is a vacuum at the teat end, the liner starts to open, the teat canal remains closed with milk inside, and teat congestion is relieved.

True

False

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8. According to the ISO definition, what it the pulsation ratio?

the proportion of milking (a+b) and rest (c+d) phases, as a percentage of the total cycle

the proportion of milking (b) and rest (d) phases, as a percentage of the total cycle

the number of times the pulsator controller operates in one minute (ppm)

the proportion of each phase in relation to the total cycle length (in milliseconds)

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9. How can the lengths of the b-phase and d-phase be adjusted? Select all that apply

by changing the pulsation rate and/or pulsation ratio

by changing the pulsation rate

by changing the pulsation ratio

by changing the pulsation chamber volume

by changing the long pulse tube length

by changing the size of the pulsator air port

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10. What are the ideal durations of the b-phase and d-phase, respectively?

600–650 ms and 150–200 ms

500–600 ms and 200–250 ms

450–650 ms and 100–300 ms

200–250 ms and 500–600 ms

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11. What are the ideal lengths of the pulsation phases?

The b-phase should be as long as possible; the d-phase should be as short as possible; the a-phase should be as long as possible; and the c-phase should be as short as possible.

The b-phase should be as long as possible, and the d-phase should be as short as possible.

The b-phase should be as short as possible, and the d-phase should be as long as possible.

The a-phase should be as short as possible, and the c-phase should be as short as possible.

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12. For the next four questions, consider a pulsator with these parameters:

Rate = 60 ppm
Ratio = 64:36
a-phase = 246 ms
b-phase = 396 ms
c-phase = 194 ms
d-phase = 164 ms

What would the b-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

MEASURING - 5 - MILKING UNIT_Pulsation

Question Title

1. Enter your first and last name

Question Title

2. The pulsation rate is typically 40 to 70 ppm for cows, and faster for sheep and goats.

Question Title

3. In alternate pulsation, all four liners of one cluster operate together.

Question Title

4. What determines the total length of the pulsation cycle?

Question Title

5. What happens to the liner status, pressure in the pulsation chamber, length of dependence, and milk flow during the a-phase?

Question Title

6. In the b-phase, there is a milking vacuum at the teat end (inside the liner), the liner is open, the teat canal is open, milk flows out of the teat, and blood flows to the teat end.

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7. In the b-phase, there is a vacuum at the teat end, the liner starts to open, the teat canal remains closed with milk inside, and teat congestion is relieved.

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8. According to the ISO definition, what it the pulsation ratio?

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9. How can the lengths of the b-phase and d-phase be adjusted? Select all that apply

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10. What are the ideal durations of the b-phase and d-phase, respectively?

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11. What are the ideal lengths of the pulsation phases?

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12. For the next four questions, consider a pulsator with these parameters:

Rate = 60 ppm
Ratio = 64:36
a-phase = 246 ms
b-phase = 396 ms
c-phase = 194 ms
d-phase = 164 ms

What would the b-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

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13. Using the same pulsator as question 11, what would the d-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

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14. Using the same pulsator as question 11, what would the b-phase length be if the ratio was changed to 70:30 (keeping the same rate)?

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15. Using the same pulsator as question 11, what would the d-phase length be if the ratio was changed to 70:30 (keeping the same rate)?

MEASURING - 5 - MILKING UNIT_Pulsation

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* 1. Enter your first and last name

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* 2. The pulsation rate is typically 40 to 70 ppm for cows, and faster for sheep and goats.

Question Title

* 3. In alternate pulsation, all four liners of one cluster operate together.

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* 4. What determines the total length of the pulsation cycle?

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* 5. What happens to the liner status, pressure in the pulsation chamber, length of dependence, and milk flow during the a-phase?

Question Title

* 6. In the b-phase, there is a milking vacuum at the teat end (inside the liner), the liner is open, the teat canal is open, milk flows out of the teat, and blood flows to the teat end.

Question Title

* 7. In the b-phase, there is a vacuum at the teat end, the liner starts to open, the teat canal remains closed with milk inside, and teat congestion is relieved.

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* 8. According to the ISO definition, what it the pulsation ratio?

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* 9. How can the lengths of the b-phase and d-phase be adjusted? Select all that apply

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* 10. What are the ideal durations of the b-phase and d-phase, respectively?

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* 11. What are the ideal lengths of the pulsation phases?

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* 12. For the next four questions, consider a pulsator with these parameters:Rate = 60 ppmRatio = 64:36a-phase = 246 msb-phase = 396 msc-phase = 194 msd-phase = 164 msWhat would the b-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

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* 13. Using the same pulsator as question 11, what would the d-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

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* 14. Using the same pulsator as question 11, what would the b-phase length be if the ratio was changed to 70:30 (keeping the same rate)?

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* 15. Using the same pulsator as question 11, what would the d-phase length be if the ratio was changed to 70:30 (keeping the same rate)?

1. Enter your first and last name

2. The pulsation rate is typically 40 to 70 ppm for cows, and faster for sheep and goats.

3. In alternate pulsation, all four liners of one cluster operate together.

4. What determines the total length of the pulsation cycle?

5. What happens to the liner status, pressure in the pulsation chamber, length of dependence, and milk flow during the a-phase?

6. In the b-phase, there is a milking vacuum at the teat end (inside the liner), the liner is open, the teat canal is open, milk flows out of the teat, and blood flows to the teat end.

7. In the b-phase, there is a vacuum at the teat end, the liner starts to open, the teat canal remains closed with milk inside, and teat congestion is relieved.

8. According to the ISO definition, what it the pulsation ratio?

9. How can the lengths of the b-phase and d-phase be adjusted? Select all that apply

10. What are the ideal durations of the b-phase and d-phase, respectively?

11. What are the ideal lengths of the pulsation phases?

12. For the next four questions, consider a pulsator with these parameters:

Rate = 60 ppm
Ratio = 64:36
a-phase = 246 ms
b-phase = 396 ms
c-phase = 194 ms
d-phase = 164 ms

What would the b-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

13. Using the same pulsator as question 11, what would the d-phase length be if the rate was changed to 55 ppm (keeping the same ratio)?

14. Using the same pulsator as question 11, what would the b-phase length be if the ratio was changed to 70:30 (keeping the same rate)?

15. Using the same pulsator as question 11, what would the d-phase length be if the ratio was changed to 70:30 (keeping the same rate)?