ACTUAL Exam Questions and CORRECT
Answers
Chlorine - CORRECT ANSWER - Sodium hypochlorite is the most common disinfectant
used
What level should the pH be? - CORRECT ANSWER - Between 7.2 and 7.8
What happens at low pH and how to increase pH - CORRECT ANSWER - Corrosion,
staining, etching ; use soda ash
What happens at high pH and how do you lower it - CORRECT ANSWER - Scaling, cloudy
water, clogged filters ; muriatic acid
What happens at low alkalinity and how to raise it - CORRECT ANSWER - Etching,
corrosion, green water, burning eyes, and pH bounce ; add sodium bicarbonate
What happens at high alkalinity and how to lower it - CORRECT ANSWER - cloudy water,
less efficient chlorine, and pH being harder to adjust ; dilute the water or add muriatic acid
What is calcium hardness (CH) and what is a good range - CORRECT ANSWER - Calcium
Hardness is a measure of calcium content in water. The normal range of CH is 200 to 400
What happens at low Calcium Hardness and how to raise it - CORRECT ANSWER - Low
Calcium hardness can lead to corrosive water, etching, and staining ; add calcium chloride
What happens at high calcium hardness and how to lower it - CORRECT ANSWER -
corrosion, scaling, clogged filters, reduced circulation, and irritation ; dilute the water
, What is the range of Total Dissolved Solids (TDS) - CORRECT ANSWER - Never exceed
2000 ppm
How hot can a spa be - CORRECT ANSWER - Below 104 F
What is Saturation Index and what is the acceptable range - CORRECT ANSWER -
Saturation Index is the measurement of the solubility of calcium carbonate in the water ; SI = pH
+ Tf + CF + Af -TDSf from -.3 to .3 0 is perfect
How to test chlorine - CORRECT ANSWER - Fill the small end of the test tube until you
reach the 9 mL fill mark. Add 5 drops of R-0001. Add 5 drops of R-0002. Cap the test and invert
it to mix the solution. Judge the final coloring of your test against the colors and record the value.
This is your Free Chlorine. Now, add 5 drops of R-0003. Cap and invert the test. This coloring is
your Total Chlorine. Your Combined Chlorine is your Total Chlorine minus Free Chlorine
How to test pH - CORRECT ANSWER - Fill the large end of the test tube up to the fill line
found on the side of the container. Add 5 drops of R-0004. Cap and invert to mix. Judge this
color against the test tube and record the value as your pH.
How to determine the amount of acid to add to a pool to lower pH - CORRECT ANSWER -
Complete all of the steps for a normal pH reading. Add 1 drop of R-0004 into the completed pH
test. Cap and invert to mix. Check this result against the test tube and repeat this process until the
color of your pH test is at 7.6. Then, locate the chart labeled "acid demand." Using the number of
drops it took you to reach an ideal pH and the gallonage of your pool, determine the amount of
acid you must add.
How to determine the amount of soda ash to add to a pool to raise pH - CORRECT
ANSWER - Complete all of the steps for a normal pH reading. Add 1 drop of R-0006 into the
completed pH test. Cap and invert to mix. Check this result against the test tube and repeat this
process until the color of your pH test is at 7.6. Then, locate the chart labeled "base demand."
Using the number of drops it took you to reach an ideal pH and the gallonage of your pool,
determine the amount of soda ash you must add.
Keep to Code - CORRECT ANSWER - The pool is clean of excessive dirt, debris, and algae