TEXAS CLASS C SURFACE WATER 2024/2025 EXAM REVIEW
QUESTIONS WITH COMPLETE & APPROVED ANSWERS.
1) The purpose for fluoridation of municipal water supplies is to help prevent what? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ Dental decay _ _ _
2) Chlorine valves are opened and closed with what? -- Answer ✔✔ Valve wrenches
_ _ _ _ _ _ _ _ _ _ _ _ _
provided with a cylinder or 1-ton container by the manufacturer
_ _ _ _ _ _ _ _ _
3) What does one cubic foot of water weigh? -- Answer ✔✔ 62.4 lbs
_ _ _ _ _ _ _ _ _ _ _ _
4) When opening and closing valves in high pressure lines, the valves should be opened
_ _ _ _ _ _ _ _ _ _ _ _ _ _
and closed how? -- Answer ✔✔ Slowly
_ _ _ _ _ _
5) A hypochlorinator is used to feed ___ into a water supply -- Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Hypochlorite solution _
6) The Safe Water Drinking Act has set water quality standards for which category? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ Physical and chemical, radiological, and bacteriological
_ _ _ _ _ _ _
7) When a coagulant reacts with finely divided and suspended material in raw water, a:
_ _ _ _ _ _ _ _ _ _ _ _ _ _
-- Answer ✔✔ Floc is formed
_ _ _ _ _
8) The Rules and Regulations for Public Water Systems require straight flow
_ _ _ _ _ _ _ _ _ _ _
rectangular sedimentation basins to be designed to provide a detention time of at
_ _ _ _ _ _ _ _ _ _ _ _ _
least: -- Answer ✔✔ 6 hours
_ _ _ _ _
9) Which of the following statements regarding sedimentation process is true: --
_ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ The 4 traditional zones of a rectangular sedimentation basin are the
_ _ _ _ _ _ _ _ _ _ _ _ _
inlet zone, settling zone, outlet zone, and the sludge zone
_ _ _ _ _ _ _ _ _
, 10) Tastes and odors caused by decaying vegetation can often be removed in the
_ _ _ _ _ _ _ _ _ _ _ _ _
treatment process by the use of: -- Answer ✔✔ Activated carbon
_ _ _ _ _ _ _ _ _ _
11) What chemical is used for softening water? -- Answer ✔✔ Lime (Soda Ash)
_ _ _ _ _ _ _ _ _ _ _ _
12) The process of coagulation includes: -- Answer ✔✔ A chemical reaction, a physical
_ _ _ _ _ _ _ _ _ _ _ _ _
reaction, an agglomeration reaction, and neutralization of charged particles
_ _ _ _ _ _ _ _
13) If sludge is allowed to remain too long on the bottom of a sedimentation basin, a
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
problem could develop with: -- Answer ✔✔ Taste and odor problems, reduction of
_ _ _ _ _ _ _ _ _ _ _ _ _
detention time in the basin, resuspension of solids, and creation of septic conditions
_ _ _ _ _ _ _ _ _ _ _ _
14) Coagulation is affected by: -- Answer ✔✔ Turbidity, pH, and temperature _ _ _ _ _ _ _ _ _ _
15) In raw water reservoirs, the most common effect of aeration is: -- Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Removal of taste and odors _ _ _ _
16) One cubic foot of water contains ___ gallons -- Answer ✔✔ 7.48 gallons
_ _ _ _ _ _ _ _ _ _ _ _
17) One of the purposes of water storage tanks is to ____ -- Answer ✔✔ Supply water
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
at peak demands
_ _
18) Mud, silt, clay, and other suspended matter in water that cause it to appear murky
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
are called what? -- Answer ✔✔ Turbidity
_ _ _ _ _ _
19) If the pressure gauge at the bottom of a 200 ft. standpipe reads 68 psi, what is the
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
static head in feet? -- Answer ✔✔ 157 ft
_ _ _ _ _ _ _ _
20) The volume of a sample should depend on what? -- Answer ✔✔ What tests the
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
sample will be used for _ _ _ _
21) What does a pump need when the gland follower is pulled all the way down? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ A new packing _ _ _ _
QUESTIONS WITH COMPLETE & APPROVED ANSWERS.
1) The purpose for fluoridation of municipal water supplies is to help prevent what? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ Dental decay _ _ _
2) Chlorine valves are opened and closed with what? -- Answer ✔✔ Valve wrenches
_ _ _ _ _ _ _ _ _ _ _ _ _
provided with a cylinder or 1-ton container by the manufacturer
_ _ _ _ _ _ _ _ _
3) What does one cubic foot of water weigh? -- Answer ✔✔ 62.4 lbs
_ _ _ _ _ _ _ _ _ _ _ _
4) When opening and closing valves in high pressure lines, the valves should be opened
_ _ _ _ _ _ _ _ _ _ _ _ _ _
and closed how? -- Answer ✔✔ Slowly
_ _ _ _ _ _
5) A hypochlorinator is used to feed ___ into a water supply -- Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Hypochlorite solution _
6) The Safe Water Drinking Act has set water quality standards for which category? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ Physical and chemical, radiological, and bacteriological
_ _ _ _ _ _ _
7) When a coagulant reacts with finely divided and suspended material in raw water, a:
_ _ _ _ _ _ _ _ _ _ _ _ _ _
-- Answer ✔✔ Floc is formed
_ _ _ _ _
8) The Rules and Regulations for Public Water Systems require straight flow
_ _ _ _ _ _ _ _ _ _ _
rectangular sedimentation basins to be designed to provide a detention time of at
_ _ _ _ _ _ _ _ _ _ _ _ _
least: -- Answer ✔✔ 6 hours
_ _ _ _ _
9) Which of the following statements regarding sedimentation process is true: --
_ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ The 4 traditional zones of a rectangular sedimentation basin are the
_ _ _ _ _ _ _ _ _ _ _ _ _
inlet zone, settling zone, outlet zone, and the sludge zone
_ _ _ _ _ _ _ _ _
, 10) Tastes and odors caused by decaying vegetation can often be removed in the
_ _ _ _ _ _ _ _ _ _ _ _ _
treatment process by the use of: -- Answer ✔✔ Activated carbon
_ _ _ _ _ _ _ _ _ _
11) What chemical is used for softening water? -- Answer ✔✔ Lime (Soda Ash)
_ _ _ _ _ _ _ _ _ _ _ _
12) The process of coagulation includes: -- Answer ✔✔ A chemical reaction, a physical
_ _ _ _ _ _ _ _ _ _ _ _ _
reaction, an agglomeration reaction, and neutralization of charged particles
_ _ _ _ _ _ _ _
13) If sludge is allowed to remain too long on the bottom of a sedimentation basin, a
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
problem could develop with: -- Answer ✔✔ Taste and odor problems, reduction of
_ _ _ _ _ _ _ _ _ _ _ _ _
detention time in the basin, resuspension of solids, and creation of septic conditions
_ _ _ _ _ _ _ _ _ _ _ _
14) Coagulation is affected by: -- Answer ✔✔ Turbidity, pH, and temperature _ _ _ _ _ _ _ _ _ _
15) In raw water reservoirs, the most common effect of aeration is: -- Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _ _ _ _
Removal of taste and odors _ _ _ _
16) One cubic foot of water contains ___ gallons -- Answer ✔✔ 7.48 gallons
_ _ _ _ _ _ _ _ _ _ _ _
17) One of the purposes of water storage tanks is to ____ -- Answer ✔✔ Supply water
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
at peak demands
_ _
18) Mud, silt, clay, and other suspended matter in water that cause it to appear murky
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
are called what? -- Answer ✔✔ Turbidity
_ _ _ _ _ _
19) If the pressure gauge at the bottom of a 200 ft. standpipe reads 68 psi, what is the
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
static head in feet? -- Answer ✔✔ 157 ft
_ _ _ _ _ _ _ _
20) The volume of a sample should depend on what? -- Answer ✔✔ What tests the
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
sample will be used for _ _ _ _
21) What does a pump need when the gland follower is pulled all the way down? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ A new packing _ _ _ _
