UNDERSTANDING - 10 - AOC_Teatcup Knowledge - Part 2

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* 1. Enter your first and last name

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* 2. Select all that apply. Which of these are affected by liner compression?

the keratin removal rate of the canal

teat-end hyperkeratosis

the vacuum applied to the teat end

the vacuum applied to the teat barrel and base

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* 3. What is a consequence of low milking vacuum?

gentler and more complete milking

fewer liner slips

less frequent unit fall-offs

faster milking

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* 4. What is a consequence of high milking vacuum?

decreased peak and average flow

decreased teat tissue stress

lower liner compression

increased strip yield (less complete milking)

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* 5. A higher milking vacuum level will generally reduce teat tissue congestion.

True

False

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* 6. What action produces more teat tissue congestion?

increasing the b-phase from 400 ms to 500 ms, while keeping the d-phase at 220 ms

increasing the average claw vacuum from 11 inches of mercury (37 kPa) to 13 inches of mercury (44 kPa)

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* 7. Increasing peak milk flow rates will always increase parlor throughput (the number of cows milked per hour).

True

False

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* 8. Increased teat end thickness after milking (teat-end tissue congestion) has been shown to be related to:

an increased risk of new mastitis infections

an increased risk of unit fall-off

increased intramammary pressure during milking

increased teat-end hyperkeratosis

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* 9. The main result of increased liner compression is:

reduced teat-end hyperkeratosis

a reduced recovery rate of teat tissue congestion, possibly because of the limiting of edema that occurs during milking

an increase in milking time

reduced ringing at the base of the teat

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* 10. What average claw vacuum range will produce the best balance among milking quickly, milking completely, and milking gently?

10–13 inches of mercury (32–44 kPa)

9–10 inches of mercury (28–32 kPa)

13–15 inches of mercury (44–48 kPa)

11–12 inches of mercury (36–40 kPa)

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* 11. There are clear increases in the quickness of milking up to an average claw vacuum of approximately:

10 inches of mercury (32 kPa)

15 inches of mercury (48 kPa)

12 inches of mercury (40 kPa)

none of the above

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* 12. Select all that match the aspects of milking with the measurements that can be taken to assess them.

gentleness of milking: teat condition when units are removed

completeness of milking: stripping yield when units are removed

quickness of milking: average milk flow rate (total milk yield/total milking time)

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* 13. What is the best measurement of the quickness of milking?

peak milk flow rate

average milk flow rate (total milk yield/total machine on time)

average machine on time

none of the above

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* 14. Early cluster removal from slow-milking cows generally increases the number of cows milked per hour in a milking parlor.

True

False