TCEQ class c water license exam (Strategies
Review of Key Quizzes) Questions with
correct verified detailed answer latest
update 2025
39. Potable water is that of--- correct precise answer --- Maintained
at adequate pressure, pathogen free, and contains a chlorine residual
40. Excessive nitrates in drinking water can care a condition that
affects infants under the age of 6 months, this condition known as---
correct precise answer --- Blue baby
41. In surface water treatment the process of causing the fine
particles in water to join together to form larger heavier particles that
settle in a clarifier is called--- correct precise answer --- Coagulation
42. The test commonly used to determine the chemical dosage for
the surface water plants is the test--- correct precise answer --- Jar
43. Suspended solids are the solids portion that--- correct precise
answer --- Cause mudballs and filter plugging
44. A public Water system is required to take samples of water for
bacteriolog- ical analysis. The organism that is used as an indicator is-
-- correct precise answer --- Coliform
45. Chisine dosage is demand plus desired--- correct precise answer
--- Residual
,46. A storage vessel that is the same diameter from the ground to
the top and is more than 20 feet but less than 80 feet tall is called a---
correct precise answer --- Stand pipe
47. Potable water must be stored at an elevation at least 80.85 feet
above
the highest known connection to provide the minimum operating
pressure of
psi--- correct precise answer --- 35
48. Water tank that uses compressed air over water to provide
pressure is called a--- correct precise answer --- Hydro pneumatic
tank
49. According to the lead and copper rule, pipe and fittings may not
contain more than lead or solder and flux may not contain more
than 0.2% lead--- correct precise answer --- 8.0%
50. When testing for chlorine residual DPD is used as an indicator,
when DPD is added to Water containing Chlorine what loser does the
sample turn--- correct precise answer --- Red
51. Most commonly used valves for isolating a water leak is the---
correct precise answer --- Gate valve
52. In the distribution system when a valve or hydrant is opened or
closed too fast it could result in a--- correct precise answer --- Water
hammer
, 53. The most commonly used pump in the distribution system is---
correct precise answer --- Centrifugal
54. You are treating 21 MGD water in a surface Water plant, how
many gallons per minute is this?--- correct precise answer --- 14,583
gallons per minute
55. A class D certified Operator can operate a public water system
up to
connections--- correct precise answer --- 250
56. All state of Texas operator licenses after issue are good for
years--- correct precise answer --- 3
57. After analyzing monthly bacteriological samples the operator is
notified that one testing point, tested positive. The operator should----
correct precise answer --- Collect another
sample at the site that tested positive plus one within 5 customers
upstream and one within 5 customers downstream and re-submit
58. Any excavation greater than feet in depth requires the use of
OSHA approved shoring equipment or sloping of walls to prevent cave
-ins--- correct precise answer --- 5 feet
59. If an operator discovers a Chlorine on a 150 lb. Cylinder inside a
room he/she should immediately---- correct precise answer --- - Call
for assistance and wait
- put on self contained breathing apparatus and attach lifeline
Review of Key Quizzes) Questions with
correct verified detailed answer latest
update 2025
39. Potable water is that of--- correct precise answer --- Maintained
at adequate pressure, pathogen free, and contains a chlorine residual
40. Excessive nitrates in drinking water can care a condition that
affects infants under the age of 6 months, this condition known as---
correct precise answer --- Blue baby
41. In surface water treatment the process of causing the fine
particles in water to join together to form larger heavier particles that
settle in a clarifier is called--- correct precise answer --- Coagulation
42. The test commonly used to determine the chemical dosage for
the surface water plants is the test--- correct precise answer --- Jar
43. Suspended solids are the solids portion that--- correct precise
answer --- Cause mudballs and filter plugging
44. A public Water system is required to take samples of water for
bacteriolog- ical analysis. The organism that is used as an indicator is-
-- correct precise answer --- Coliform
45. Chisine dosage is demand plus desired--- correct precise answer
--- Residual
,46. A storage vessel that is the same diameter from the ground to
the top and is more than 20 feet but less than 80 feet tall is called a---
correct precise answer --- Stand pipe
47. Potable water must be stored at an elevation at least 80.85 feet
above
the highest known connection to provide the minimum operating
pressure of
psi--- correct precise answer --- 35
48. Water tank that uses compressed air over water to provide
pressure is called a--- correct precise answer --- Hydro pneumatic
tank
49. According to the lead and copper rule, pipe and fittings may not
contain more than lead or solder and flux may not contain more
than 0.2% lead--- correct precise answer --- 8.0%
50. When testing for chlorine residual DPD is used as an indicator,
when DPD is added to Water containing Chlorine what loser does the
sample turn--- correct precise answer --- Red
51. Most commonly used valves for isolating a water leak is the---
correct precise answer --- Gate valve
52. In the distribution system when a valve or hydrant is opened or
closed too fast it could result in a--- correct precise answer --- Water
hammer
, 53. The most commonly used pump in the distribution system is---
correct precise answer --- Centrifugal
54. You are treating 21 MGD water in a surface Water plant, how
many gallons per minute is this?--- correct precise answer --- 14,583
gallons per minute
55. A class D certified Operator can operate a public water system
up to
connections--- correct precise answer --- 250
56. All state of Texas operator licenses after issue are good for
years--- correct precise answer --- 3
57. After analyzing monthly bacteriological samples the operator is
notified that one testing point, tested positive. The operator should----
correct precise answer --- Collect another
sample at the site that tested positive plus one within 5 customers
upstream and one within 5 customers downstream and re-submit
58. Any excavation greater than feet in depth requires the use of
OSHA approved shoring equipment or sloping of walls to prevent cave
-ins--- correct precise answer --- 5 feet
59. If an operator discovers a Chlorine on a 150 lb. Cylinder inside a
room he/she should immediately---- correct precise answer --- - Call
for assistance and wait
- put on self contained breathing apparatus and attach lifeline
