Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
The porous material just above the water table that holds small quantities of water by capillary action is called?
2.
Potassium Permanganate should be?
3.
For maximum charge neutralization the average zeta potential should be in what range?
4.
Why do operators monitor a filter's operation time, headloss and effluent turbidity level?
5.
The release of dissolved gasses in saturated cold water when pressure decreases in filter beds causes?
6.
In a permit entry confined space, who is responsible for terminating entries?
7.
Post sedimentation process, the turbidity of settled water before it is applied to the filters should be kept below?
8.
What is the most favorable raw water condition for good flocculation?
9.
Water hardness is measured in equivalent amounts of?
10.
What was created to have uniform standards in Water Treatment?
11.
What TON will consumers start to notice?
12.
What would be the most probable solution to control algae in the source water if the algae is clogging the filters in the water plant?
14.
The ion exchange process usually is used to remove what from water?
15.
What type of charge do the compounds that form when iron or aluminum salts react with water have?
16.
What water quality indicator should be considered in a lake de-stratification program?
17.
Settled backwash water that is recovered and re-used from a conventional surface water filtration plant should be returned to the beginning of the treatment train.
18.
Current regulations require that water treatment wastes be monitored?
19.
The process by which water becomes a gas and rises is called?
20.
Impurities that do not dissolve in water and settle out eventually are?
21.
The fluoride injection point should be located after water has received complete treatment.
22.
What does pinpoint floc, fish eyes, and high turbidity in settled water indicate?
23.
Permanganate reactions are highly dependent on?
24.
The Colilert test (ONPG-MUG) shows the presence of total coliforms is shown by?
25.
Water that is softened has a high pH and a high concentration of CaCO3. Therefore stabilization is essential in order to prevent the CaCO3 from precipitating out on?
26.
How many colonies per mI must the HPC test results show to be considered a reliable sample for coliform bacteria?
27.
Water impurities that come from plants or animals are
28.
In what form is Iron soluble in water?
29.
What is the main problem if particle agglomeration is occurring in a filter for iron and manganese removal at the interface of the coal layer below?
30.
When 0.3 mg/L chlorine is added to water, the residual will increase by 0.3 mg/L.
31.
What conditions in a gravity filter will be produced when there is a larger particle size and less dense anthracite media?
32.
The continuous circulation of water from the earth into the atmosphere and back again is called?
33.
Giardia Lamblia is transmitted?
34.
What is the MCL for HAA5s?
35.
Salts, Bases, and Acids lacking carbon are organic compounds.
36.
What term describes the gathering of colloids into larger particles?
37.
What does it mean when a filter is ripening?
38.
Wet activated carbon will remove what from the air? (In regards to safety)
39.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
40.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
41.
A connection between a potable water system and a non potable water system is?
42.
An autoclave will sterilize at
43.
What is the pH of a saturated solution of sodium fluoride?
44.
Nitrification in the distribution system can best be described as?
45.
Where are the two points on a gravity filter used to measure head loss located?
46.
What will cause reverse osmosis membranes to compact faster?
47.
The chemical combination for substances in solution so as to cause separation in the insoluble form can be described as?
48.
When it is dissolved in water for disinfection purposes, how long does ozone last?
49.
What is a physical separation between a water supply outlet and the flood-level rim of a receiving vessel that must be at least twice the diameter of the water supply outlet and the flood-level rim of the receiving vessel. This separation must be at leasttwice the diameter of the water supply outlet and never less than one inch?
50.
What device found in labs sterilizes by using pressurized steam?
