UNDERSTANDING - 4 - MILKING MACHINE_Principles of Machine Milking

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* 1. Enter your First and Last Name

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* 2. Select all that apply. What is the range of typical system vacuum levels?

48–52 KPa

10–12 Hg

42–50 KPa

12–15 Hg

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* 3. What is another name for the milking unit?

claw

cluster

teatcup

milking system

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* 4. What occurs in the pulsation chamber that causes the liner to open and close?

vacuum and atmospheric pressure both actuate at the same time

the vacuum actuates

vacuum and atmospheric pressure actuate alternately

atmospheric pressure actuates

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* 5. The teat end is exposed to the vacuum only when the liner is open.

True

False

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* 6. The liner is open during the D-phase of the pulsation cycle and closed during the B-phase of the pulsation cycle.

True

False

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* 7. Hand milking creates a vacuum to remove milk from the teat.

True

False

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* 8. Milk flows out of the teat when it is machine milked because the vacuum pulls the teat canal open and there is a pressure difference.

True

False

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* 9. When does teat congestion occur?

When the liner is open, blood and other fluids in the teat tissue flow to the tip of the teat.

When the liner is closed, blood and other fluids in the teat tissue flow to the tip of the teat.

When the liner is open, blood and other fluids flow out of the teat.

When the liner is closed, blood flows to the upper part of the udder.

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* 10. How does teat congestion slow milk flow?

Fluids in the teat tissue flow to the tip of the teat, restricting the canal.

Blood and other fluids flow to the canal and cause it to close.

The liner doesn't open completely, so milk cannot be totally harvested.

Veins are not able to properly drain blood from the teat, so milk flow slows down.

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* 11. How is teat congestion relieved?

The liner opens and relieves the compression.

The liner closes around the teat by liner massage or compression.

The pulsation stops and the liner opens.

The pulsation is accelerated.