Microbiological Analysis of Milk Quiz

What is the primary reason milk is considered an excellent medium for microbial growth?

• Low nutrient content

• High sugar content

• High water activity

• Low pH

What is the normal pH range of milk?

• 5.0 to 5.5

• 6.0 to 6.5

• 7.0 to 7.5

• 6.6 to 6.8

Which test is used to assess the acidity of milk?

• Clot on Boiling

• Sediment test

• Lactometer test

• Alcohol test

What does a positive Clot on Boiling (COB) test indicate?

• Increased acidity

• Low bacterial count

• Good quality milk

• Presence of water

Which of the following tests is a direct quantitative test for bacteria in milk?

• Direct Microscopic Count

• Ten-Minute Resazurin Test

• Alcohol Test

• Organoleptic test

What does the presence of sediment in milk indicate?

• Good heat stability

• High quality

• Low acidity

• Careless dairy practices

What is the purpose of the Lactometer test?

• To check for water adulteration

• To assess milk density

• To determine bacterial count

• To measure acidity

Which of the following tests is used to detect abnormal milk due to mastitis?

• Lactometer Test

• Organoleptic Test

• Alcohol Test

• Sediment Test

What does a Ten-Minute Resazurin Test measure?

• Acidity level

• Bacterial activity

• Nutrient content

• Milk density

What is indicated by a high Direct Microscopic Count (DMC) in milk?

• Fair quality

• Poor quality

• Very poor quality

• Good quality