C&D Requirement and Technologies

Which 4 factors described in Sinner Circle?

• Time, Caustic concentration, pH of water and Temperature

• Time, water hardness, chemical concentration and Temperature

• Time, chemical concentration, Temperature and mechanical action

• Time, chemical type and concentration, Temperature and mechanical action

For selection of the proper cleaning chemicals, which of the following factor(s) must be taken into account?

• Nature of soil

• Water hardness, pH

• Cleaning methods and the Compatibility of equipment

• All of above

About cleaning, which one of the following statements is correct?

• Recovered water is the best choice to purge Ice cream when used as rework

• Higher cleaning temperature, better cleaning results

• Final rinse water in Ice cream plants is often used as pre-rinse water

• Quality of municipal drinking water is sufficient to be used as C&D water

About scale deposits in process line, which of the following is NOT correct?

• Acid cleaning is quite effective to remove scale

• Acid cleaning should be done in each cleaning circle

• Hard water and high process temperature promote the formation of scale

Spray shadow in the mix tank/vessel ...

• does not exist, because it is always hygienically designed

• is very difficult to clean

• can be disinfected even when soil residues left over on the surface

• are caused by clogged spray balls

Which one of the following statement is true?

• To clean tank, it should be filled at least of 2/3 of maximum of volumn

• If soil is not removed by cleaning, it can be eliminated by disinfection

• Compressed air/gas is the most preferred method of dry cleaning

• For dry process, dry the line before production start after wet cleaning

There is no contamination risk at this connection of valve discharge and drain line. True or False?

• True

• False