Environmental Controls

Question 1

Describe Dehumidification?

Answer 1

Dehumidification is the process of removing moisture vapour from the air to lower its dew point.

Question 2

When planning enclosures, what minimum requirements should be considered?

Answer 2

Must be large enough to contain whole work area
Not be larger than the performance capabilities of the dehumidification equipment
Be sturdy enough to hold up to intended work activities, potential loads and possible inclement weather
Have minimal leakage to maintain proper environmental conditions and ensure the dehumidificatioin system operates efficiently

Question 3

Describe air turns (air changes)?

Answer 3

The air turnover principal eliminates air stratification, or layering, in large open spaces by recirculating the hot air that becomes trapped in higher spaces
The number of times it does this per hour is called air turns

Question 4

At and below what relative humidity does corrosion virtually cease?

Answer 4

40%

Question 5

Describe 2 ways to reduce the relative humidity of the boundary layer?

Answer 5

Increase the surface temperature

Reduce moisture content by dehumidification

Question 6

Types of dehumidification equipment include?

Answer 6

Refrigeration

Dessicant

Question 7

Describe several benefits of dehumidification?

Answer 7

Dries the air
Lowers the dew point
Permits blasting the entire surface
Holds the blast with dry air
Helps in cleaning the surface
Holds the surface during coating application