Calcium sulphate scaling increases with:

Calcium sulphate scaling increases with:

a. Rise in pH and decrease in temperature
b. Decrease in pH and increase in temperature
c. Rise in pH and temperature
d. Decrease in pH and temperature





Answer: B

Sulphuric acid is used in the cooling tower to prevent?

Sulphuric acid is used in the cooling tower to prevent?

a. Scaling
b. Corrosion
c. Biological fouling
d. Wood deterioration



Answer: A

The rate of calcium bicarbonate breakdown and calcium carbonate scaling increases with:

The rate of calcium bicarbonate breakdown and calcium carbonate scaling increases with:

a. Rise in pH and decrease in temperature
b. Decrease in pH and increase in temperature
c. Rise in pH and temperature
d. Decrease in pH and temperature





Answer: C

Crossflow towers:

Crossflow towers:

a. have low pressure drop in relation to its capacity
b. have high pressure drop in relation to its capacity
c. have lower fan power requirement leading to lower energy costs
d. have high fan power requirements
e. A and C





Answer: E

Dissolved solids build up in a closed cooling tower system as the water evaporates from the system. This buildup is controlled by:

Dissolved solids build up in a closed cooling tower system as the water evaporates from the system. This buildup is controlled by:

a. Adding chemicals to remove the dissolved solids
b. Treating the water supply to remove dissolved solids
c. Scraping the scale from the cooling tower components on a regular basis
d. bleeding a portion of the water from the system continuously




Answer: D

The average amount of water volume that evaporates from a cooling tower is:

The average amount of water volume that evaporates from a cooling tower is:

a. 2%
b. 10%
c. 15%
d. 5%
e. 3.5%





Answer: D