UNDERSTANDING - 5 - MILKING UNIT_Liners

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* 1. Enter your First and Last name

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* 2. In theory, liners of all types are designed to minimize liner slips and cluster falls, and to milk as quickly and completely as possible, minimizing teat congestion, discomfort, and injury.

True

False

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* 3. A liner designed primarily to reduce cup slips tends to be less comfortable for cows.

True

False

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* 4. Select the correct description of liner design.

A liner designed primarily to reduce cup slips tends to be more comfortable for cows.

A liner designed primarily for fast milking tends to leave more milk in the udder cisterns.

A liner designed primarily to maximize teat congestion tends to have more cup slips.

Liners are designed to milk as quickly and completely as possible, and teat congestion is a secondary concern in the milking process.

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* 5. The shape, tension, and surface condition of the teatcup liner changes gradually with liner use, age, and storage, and this gradual deterioration should not have significant effects on the teat milking characteristics.

True

False

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* 6. During milking, the pulsation chamber, located between the teatcup and liner, regularly alternates from vacuum (teatcup liner is fully closed) to atmospheric pressure (teatcup liner is fully open).

True

False

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* 7. The tip (end) of the teat, below the margin of contact between the teat and liner wall, is subjected to the liner vacuum throughout the entire milking period.

True

False

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* 8. What is the primary function of pulsation during machine milking?

limits the development of congestion and edema in the teat tissues

maintains a high rate of milk flow from the teat within each pulsation cycle

reduces the rate of new mastitis infections

stimulates milk ejection

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* 9. Select all that apply. How can teat-end hyperkeratosis be reduced?

by minimizing the time of the low milk flow rate (<1 kg/min)

by changing liners more often

by reducing the number of pulsation cycles per minute, but not to less than the minimum required

by reducing liner compression, but not to less than the minimum required

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* 10. Fill in the blank. Liner slips, milking unit fall-off, and slower milking occur when the milking vacuum is too ______________.

low

high

empty

expensive

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* 11. In which phase of the pulsation cycle does the compressive load occur?

a-phase

b-phase

c-phase

d-phase

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* 12. Select all that apply. The equipment factors that can influence the magnitude of measured compressive load include:

claw vacuum level

liner tension

liner wall thickness

liner material hardness

mouthpiece stiffness

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* 13. Liner compression can have an effect on congestion of the teat-end, hyperkeratosis, and teat canal closure.

True

False