water activity and moisture content

Water activity is directly proportionate to water/ moisture content.

• True

• False

Moisture content of food can be analysed via oven drying.

• True

• False

Calibration of water activity meter can be done using _________Aw standard.

• 0.76

• 0.16

• 1.6

• 7.6

You should fully-filled the sample in the sample cups when preparing sample for water activity meter.

• True

• False

If the weight of dried sample after oven drying is 1g. The initial weight is 1.5g. What is the moisture content of the sample?

• 33.33%

• 66.67%

• 0.33%

• 0.67%

A food with 30% of moisture content will have _________total solid.

• 30%

• <30%

• 70%

• 100%

What is the next step after removing the sample from oven (for moisture content analysis)?

• Weigh the samples immediately

• Remove the samples from sample crucible/ pans.

• Place the sample on bench to cool it down.

• Place in the desicator.

Why sample is required to cool in the desiccator and not on a open bench?

• To prevent sample mix up.

• As a safety measure so that other will not touch on the hot surface.

• To prevent moisture pick up in the hot sample.

• To reduce the moisture content further.

Which of the following is the sample cup/pan for the water activity meter?

• 
• 
• 
• 

Vacumm drying is preferred over oven drying when the food to be analysed for moisture content has a very high sugar content.

• True

• False