Question 1

Factors involved in the production of clean milk at the farm

Accepted Answer

• Health of the animals 
• Health of the workers 
• Premises- construction, location, cleanliness 
• Water supply
• Utensils 
• Milking machine 
• Methods to prevent contamination

Question 2

Methods to prevent contamination

Accepted Answer

• Pest control 
• Dust control 
• Contamination Control

Question 3

Activities in dairy plant

Accepted Answer

• Milk delivered to the dairy plant
 • Weighing and conduct of platform tests 
• Transfer of milk through pipelines for pumping into coolers 
• Cooling of milk

Question 4

Activities in dairy plant

Accepted Answer

• Storage 
• Clarification
 • Pasteurization 
• Homogenization 
• Bottling/packaging/processing

Question 5

Objectives of Hygienic Control at the dairy plant

Accepted Answer

• Ensure safe and clean products 
• Preserve the keeping quality

Question 6

Important considerations in dairy plant

Accepted Answer

• Dairy Building 
• Personnel 
• Water Supply
 • Utensils and Equipment 
• Laboratory Control

Question 7

Tests for mastitis

Accepted Answer

1. Strip cup test 
2. Modified Whiteside test 
3. California Mastitis Test

Question 8

Milk tests on Reception example

Accepted Answer

1 Platform Tests 
2 Routine Tests

Question 9

Strip cup Test
•	The strip cup or strip plate is for determining the presence of ____
•	Few streams of the foremilk are squirted onto the strip cup and are ____ for milk abnormalities

Accepted Answer

clinical mastitis ; 
visually examined

Question 10

Modified Whiteside test
• ____stirred into 5 drops milk 
• __seconds 
• See flaking or thickening

Accepted Answer

1 drop of 4% NaOH; 20

Question 11

California Mastitis Test
• Fairly accurate in measuring _____in milk. See gel formation 
• CMT is sensitive, inexpensive, and simple. • The CMT paddle is easy to clean up – simply_____.

Accepted Answer

the Somatic cell concentration; rinse with water

Question 12

CMT Score Somatic Cell Range Interpretation for:
N (Negative): ___________

Accepted Answer

0 – 200,000 Healthy Quarter

Question 13

CMT Score Somatic Cell Range Interpretation for:
T (Trace): ___________

Accepted Answer

200,000 – 400,000 Subclinical Mastitis

Question 14

CMT Score Somatic Cell Range Interpretation for:
1: ___________

Accepted Answer

400,000 – 1,200,000 Subclinical Mastitis

Question 15

CMT Score Somatic Cell Range Interpretation for:
2: ___________

Accepted Answer

1,200,000 – 5,000,000 Serious Mastitis Infection

Question 16

CMT Score Somatic Cell Range Interpretation for:
3: ___________

Accepted Answer

Over 5,000,000 Serious Mastitis Infection

Question 17

Milk tests on Reception

Accepted Answer

• Platform Tests 
• Routine Tests

Question 18

Content of Platform Tests

Accepted Answer

•	Organoleptic Tests
•	Test for developed acidity
•	Dye reduction test
•	Sediment Test
•	Tests for watering

Question 19

Reception of milk test using smell, sight, taste

Accepted Answer

Organoleptic Tests

Question 20

Reception of milk test using acidity test, pH determination, alcohol precipitation test (APT), Clot on boiling test

Accepted Answer

Test for developed acidity

Question 21

Reception of milk test using Lactometer method, Freezing method

Accepted Answer

Tests for watering

Question 22

Dye reduction test- also called _____

Accepted Answer

Resazurin test

Question 23

Routine Tests

Accepted Answer

• Raw milk 
• Pasteurized milk 
• Sterilized milk 
• Bacterial enumeration 
• Compositional tests 
• Tests for adulteration

Question 24

Test for raw milk

Accepted Answer

1.	Bacterial counts
2.	Dye reduction tests
3.	Tests for keeping quality

Question 25

A test for raw milk that using direct microscopic count, standard plate count

Accepted Answer

Bacterial counts

Question 26

A test for raw milk that using Methylene blue dye reduction test, Resazurin reduction test

Accepted Answer

Dye reduction tests

Question 27

A test for raw milk that using COB, APT, MBRT

Accepted Answer

Tests for keeping quality

Question 28

Procedures for culture based method using spread plate count

Accepted Answer

1.	1 ml of sample
2.	Incubation
3.	Count plate between 25-250 CFU

Question 29

It exploit the ability of bacteria to transfer hydrogen to dyes

Accepted Answer

Methylene blue dye reduction test

Question 30

Methylene blue dye reduction test
•	_______ or ______ in the oxidized state
•	Become ______ in the hydrogenized state

Accepted Answer

Blue or light blue; colorless (MBH2)

Question 31

Test used for Pasteurized milk

Accepted Answer

•	phosphatase 
•	storch’s tests
•	standard plate count,
•	Coliform test by presumptive method

Question 32

Test for efficiency of pasteurization

Accepted Answer

•	phosphatase 
•	storch’s tests)

Question 33

Tests to indicate postpasteurization contamination

Accepted Answer

•	(standard plate count,
•	Coliform test by presumptive method

Question 34

test for keeping quality

Accepted Answer

MBDRT

Question 35

They would buy about 4,000 litres milk from dealers daily around 2 am to which they would add water and increase the quantity to _____

Accepted Answer

5,000 litres

Question 36

Test for Sterilized milk

Accepted Answer

• Sterility Test
 • Incubated for 14 days at 30C

Question 37

Bacterial enumeration

Accepted Answer

• Coliform count 
• Thermoresistant count 
• Psychrotrophic count

Question 38

Compositional tests of milk

Accepted Answer

•	Babcock, 
•	Gerber
•	gravimetric method, 
•	lactometer method

Question 39

Determination of fat

Accepted Answer

Babcock, Gerber

Question 40

Determination of total solids and solids-not-fat content

Accepted Answer

•	gravimetric method, lactometer method

Question	Answer
Factors involved in the production of clean milk at the farm	• Health of the animals • Health of the workers • Premises- construction, location, cleanliness • Water supply • Utensils • Milking machine • Methods to prevent contamination
Methods to prevent contamination	• Pest control • Dust control • Contamination Control
Activities in dairy plant	• Milk delivered to the dairy plant • Weighing and conduct of platform tests • Transfer of milk through pipelines for pumping into coolers • Cooling of milk
Activities in dairy plant	• Storage • Clarification • Pasteurization • Homogenization • Bottling/packaging/processing
Objectives of Hygienic Control at the dairy plant	• Ensure safe and clean products • Preserve the keeping quality
Important considerations in dairy plant	• Dairy Building • Personnel • Water Supply • Utensils and Equipment • Laboratory Control
Tests for mastitis	1. Strip cup test 2. Modified Whiteside test 3. California Mastitis Test
Milk tests on Reception example	1 Platform Tests 2 Routine Tests
Strip cup Test • The strip cup or strip plate is for determining the presence of ____ • Few streams of the foremilk are squirted onto the strip cup and are ____ for milk abnormalities	clinical mastitis ; visually examined
Modified Whiteside test • ____stirred into 5 drops milk • __seconds • See flaking or thickening	1 drop of 4% NaOH; 20
California Mastitis Test • Fairly accurate in measuring _____in milk. See gel formation • CMT is sensitive, inexpensive, and simple. • The CMT paddle is easy to clean up – simply_____.	the Somatic cell concentration; rinse with water
CMT Score Somatic Cell Range Interpretation for: N (Negative): ___________	0 – 200,000 Healthy Quarter
CMT Score Somatic Cell Range Interpretation for: T (Trace): ___________	200,000 – 400,000 Subclinical Mastitis
CMT Score Somatic Cell Range Interpretation for: 1: ___________	400,000 – 1,200,000 Subclinical Mastitis
CMT Score Somatic Cell Range Interpretation for: 2: ___________	1,200,000 – 5,000,000 Serious Mastitis Infection
CMT Score Somatic Cell Range Interpretation for: 3: ___________	Over 5,000,000 Serious Mastitis Infection
Milk tests on Reception	• Platform Tests • Routine Tests
Content of Platform Tests	• Organoleptic Tests • Test for developed acidity • Dye reduction test • Sediment Test • Tests for watering
Reception of milk test using smell, sight, taste	Organoleptic Tests
Reception of milk test using acidity test, pH determination, alcohol precipitation test (APT), Clot on boiling test	Test for developed acidity
Reception of milk test using Lactometer method, Freezing method	Tests for watering
Dye reduction test- also called _____	Resazurin test
Routine Tests	• Raw milk • Pasteurized milk • Sterilized milk • Bacterial enumeration • Compositional tests • Tests for adulteration
Test for raw milk	1. Bacterial counts 2. Dye reduction tests 3. Tests for keeping quality
A test for raw milk that using direct microscopic count, standard plate count	Bacterial counts
A test for raw milk that using Methylene blue dye reduction test, Resazurin reduction test	Dye reduction tests
A test for raw milk that using COB, APT, MBRT	Tests for keeping quality
Procedures for culture based method using spread plate count	1. 1 ml of sample 2. Incubation 3. Count plate between 25-250 CFU
It exploit the ability of bacteria to transfer hydrogen to dyes	Methylene blue dye reduction test
Methylene blue dye reduction test • _______ or ______ in the oxidized state • Become ______ in the hydrogenized state	Blue or light blue; colorless (MBH2)
Test used for Pasteurized milk	• phosphatase • storch’s tests • standard plate count, • Coliform test by presumptive method
Test for efficiency of pasteurization	• phosphatase • storch’s tests)
Tests to indicate postpasteurization contamination	• (standard plate count, • Coliform test by presumptive method
test for keeping quality	MBDRT
They would buy about 4,000 litres milk from dealers daily around 2 am to which they would add water and increase the quantity to _____	5,000 litres
Test for Sterilized milk	• Sterility Test • Incubated for 14 days at 30C
Bacterial enumeration	• Coliform count • Thermoresistant count • Psychrotrophic count
Compositional tests of milk	• Babcock, • Gerber • gravimetric method, • lactometer method
Determination of fat	Babcock, Gerber
Determination of total solids and solids-not-fat content	• gravimetric method, lactometer method

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Milk quality control