UNDERSTANDING - 7 - NMC TESTING_Levels of Milking Machine Testing

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* 1. Enter your first and last name

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* 2. What element of milking performance is assessed by the NMC procedures?

adequacy of milking systems to maintain the average vacuum level in the claw within the intended range during milking

the operator of the machine and milking procedures

the performance of the teatcup liners

routine maintenance of the milking system (such as replacement of consumable parts)

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* 3. The ability of a pulsation system to operate within the manufacturer's specifications is one of the elements of milking performance that is assessed by the NMC procedures.

True

False

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* 4. Cleaning and sanitation of the milking machine is one of the elements of milking performance that is assessed by the NMC procedures.

True

False

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* 5. Select the two most important vacuum/airflow measurements used to predict the performance of the milking machine.

effective reserve

unit fall-off test

manual reserve

diagnostic airflow testing to document system performance

average claw vacuum level during milking

pulsation performance during milking

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* 6. Select all the matches that apply. Each level of milking machine testing to its main characteristics and adequate application.

basic evaluation of milking machine (level I tests): simple checks and milking-time observations; for on-farm milking management and milk quality advisors

basic milking machine testing (level II tests): milking vacuum and pulsation measurements; for on-farm advisors specializing in milking machine function, and as a routine machine check

performance testing of milking machine (level III tests): effective reserve, unit falloff, and diagnostic airflow testing to document system performance; for milking machine installers and service personnel

advanced performance testing (level IV tests): special tests of milking performance; for advanced milking machine troubleshooters and specialists

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* 7. Select all that apply. If you were going to visit a dairy farm to perform a basic evaluation of its milking machine (including the unit falloff test), what equipment would you need?

a vacuum gauge of known accuracy and a spirit level to measure milkline slope

fittings to connect to short milk tubes, milkline, and pulsator airlines

a stopwatch and test bucket

a mercury manometer

four sets of teatcup plugs and two airflow meters

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* 8. Select all that apply. What basic evaluation checks are made while the milking machine is not running?

measurement of reserve capacity of the vacuum pump

quantitative assessment of all pulsators

measurement of milkline slope

qualitative assessment of teatcup liners, claws, milk tubes, and pulse tubes

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* 9. Select all that apply. What checks should be made with the milking machine running but not milking, as part of a basic evaluation of the milking system?

qualitative check of all pulsators

check accuracy and response of the farm vacuum gauge

check reserve capacity of the vacuum pump

check responsiveness of the vacuum regulator (unit falloff test)

measure average vacuum in the claw

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* 10. Select all that apply. What tests, in addition to Level II tests, are included in Level III performance testing of milking machines?

dry tests of all pulsators

vacuum fluctuations in the receiver and milkline during milking

pulsation performance during milking

average vacuum in the claw during peak milk flow

effective reserve and air used by components

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* 11. Tests for effective reserve, manual reserve, and the amount of air used by system components should be performed:

as part of Level III: Performance Testing and Commissioning Testing

as part of Level I: Basic Evaluation

as part of Level II: Basic Machine Testing

once every month