Describe the difference between a flooded and a dry (direct ...

[cool]

Describe the difference between a flooded and a dry (direct expansion) type cooler.
 
  What will be an ideal response?

Question 2

Why is the vacuum scale on the compound gauge not used to measure deep vacuum?
 
  What will be an ideal response?

[ciecieme]

Answer to Question 1

In a flooded cooler the refrigerant surrounds the outside of the tubes and the chilled water is circulated through the inside of the tubes. A dry direct expansion type cooler will circulate the refrigerant through the inside of the tubes and the chilled water will surround the outside of the tubes.

Answer to Question 2

Mechanical gauges cannot accurately indicate the difference between a poor vacuum and a great vacuum. The needle on the gauge is typically wider than the space occupied by 1 in Hg vacuum

[cool]

Thanks for the timely response, appreciate it

[nguyenhoanhat]

Great answer, keep it coming