UNDERSTANDING - 5 - MILKING UNIT_Pulsation

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* 1. Enter your first and last name

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* 2. In alternate pulsation, all four liners of one cluster open and close at the same time.

True

False

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* 3. What factor determines the total duration of one pulsation cycle?

pulsation rate

pulsation ratio

vacuum level in the pulsator air line

type of pulsation (simultaneous vs. alternate)

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* 4. What occurs during the a-phase of pulsation?

the liner opens, the pressure in the pulsation chamber goes from atmosphere to vacuum, and milk flow slightly begins

the liner opens, the pressure in the pulsation chamber goes from vacuum to atmosphere, the teat is relieved, and milk flows

the liner opens, the pressure in the pulsation chamber is steady, and milk flows slowly

the liner remains closed, the pressure in the pulsation chamber goes from vacuum to atmosphere, and no milk is extracted

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* 5. In the b-phase of pulsation, the teat end is exposed to the milking vacuum, the liner and teat canal are open, milk flows out of the teat, and blood flows to the teat end.

True

False

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* 6. In the b-phase, the teat end is exposed to the vacuum, the liner starts to open, the teat canal remains closed, and teat congestion is relieved.

True

False

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* 7. How is pulsation ratio defined according to ISO standards?

the ratio of opening and open phases (a+b) to the closing and closed phases (c+d)

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

the number of times the pulsator actuates in one minute (ppm)

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

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* 8. What are the target ranges for the b-phase and d-phase of pulsation?

b-phase: 200 to 250 ms
d-phase: 500 to 600 ms

b-phase: 50% to 60%
d-phase: 15% to 25%

b-phase: 15% to 25%
d-phase: 50% to 60%

b-phase: 500 to 600 ms
d-phase: 200 to 250 ms

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* 9. What are the bases for choosing the target values for the b-phase and d-phase of pulsation?

The b-phase should be as long as possible without producing teat congestion, and the d-phase should be as short as possible without producing teat congestion.

The b-phase should be as short as possible without producing teat congestion, and the d-phase should be as long as possible without producing teat congestion

The a-phase should be as long as possible without producing teat congestion, and the c-phase should be as short as possible without producing teat congestion

Both the a-phase and b-phase should be as short as possible

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* 10. Select all that apply. What are the phases with durations that are influenced by the pulsation chamber volume, hose length, and air port size?

a-phase

b-phase

c-phase

d-phase