Level 4 Module 1: Water Treatment questions and
answers with solutions 2025/2026
The greater the concentration of dissolved solids in an HVAC system's
water, the greater the potential for - ANSWER Corrosion
Dissolved gases that have almost no effect on water systems include: -
ANSWER Nitrogen
Which of the following is caused by the presence of slime -producing
biologic organisms in the water in an HVAC system? - ANSWER
Inadequate Heat Transfer
If blue litmus paper turns red when a water sample is tested, this
indicates that the pH of the water is: - ANSWER Below 7.0
Adding chemicals to a solution tank should occur in the following
sequence: - ANSWER Water first, then chemicals
Which of the following is a mechanical filtration device used for
mainting water quality? - ANSWER Strainer
Backwashing is used to prevent accumulated particles from clogging a: -
ANSWER A Multimedia filter
answers with solutions 2025/2026
The greater the concentration of dissolved solids in an HVAC system's
water, the greater the potential for - ANSWER Corrosion
Dissolved gases that have almost no effect on water systems include: -
ANSWER Nitrogen
Which of the following is caused by the presence of slime -producing
biologic organisms in the water in an HVAC system? - ANSWER
Inadequate Heat Transfer
If blue litmus paper turns red when a water sample is tested, this
indicates that the pH of the water is: - ANSWER Below 7.0
Adding chemicals to a solution tank should occur in the following
sequence: - ANSWER Water first, then chemicals
Which of the following is a mechanical filtration device used for
mainting water quality? - ANSWER Strainer
Backwashing is used to prevent accumulated particles from clogging a: -
ANSWER A Multimedia filter
