Class D Water Operator License Exam TCEQ Questions 2024, Exams of Nursing

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TCEQ Questions 2024

T/F: In Texas, about 75% of all water is used for commercial, industrial, or agricultural purposes. - Correct Answers ✅✅True Water covers approximately ________ of Earth's surface. - Correct Answers ✅✅71% Drought is an extended period when a region receives a deficiency in its ________ water supply. - Correct Answers ✅✅atmospheric, ground, or surface T/F: Only about 1 gallon of tap water per person/day is used for drinking and cooking - Correct Answers ✅✅True Excluding outside water use, the average household uses about _______ gallons of water per month for inside use - Correct Answers ✅✅2, T/F: Only 3% of all the fresh water on earth can be easily accessed for use. - Correct Answers ✅✅False (only 1%) T/F: In 1978, the Texas Department of Health (TDH) assumed primacy over the Safe Drinking Water Act from the EPA. - Correct Answers ✅✅True

TCEQ Questions 2024

T/F: PWS officials should be pro-active in their approach to terrorism. - Correct Answers ✅✅True _________ permits the owner of a well to pump as much water as desired, even if the water is drained from beneath the land of others. - Correct Answers ✅✅Rule of Capture In Texas, agricultural water demand accounts for about ___% of the total water used. - Correct Answers ✅✅57% T/F: An example of a non-transient non-community PWS is a rural school. - Correct Answers ✅✅True Monitoring average and maximum daily water ______ enables us to plan ahead for growth. - Correct Answers ✅✅Demand T/F: The Safe Drinking Water Act sets standards for drinking water including physical, chemical, bacteriological, and radiological characteristics. - Correct Answers ✅✅True "Potable" means water is safe to drink and has a measurable chlorine ________. - Correct Answers ✅✅Residual

TCEQ Questions 2024

The plant operator is responsible for a sufficient supply of safe and ________ drinking water. - Correct Answers ✅✅Palatable T/F: The Texas State Board of Fire Insurance requires utilities that provide fire protection to have a minimum amount of water available based on 30 gals per person per day. - Correct Answers ✅✅False ( gals per person per day) T/F: The primary state regulator of water utilities is the TCEQ. - Correct Answers ✅✅True T/F: All community and non-transient non-community PWS, regardless of source of water, must be under the supervision of a licensed water works operator. - Correct Answers ✅✅True Meter readers bring in operating revenue and profoundly impact _____ relations. - Correct Answers ✅✅Public The federal regulator of drinking water is the _____. - Correct Answers ✅✅EPA

TCEQ Questions 2024

T/F: Duties of distribution operator include repairing leaks, making taps, flushing mains, and taking radiological samples. - Correct Answers ✅✅False (Repair leaks, Make taps, Flush mains, Operate pumps, Take bacteriological samples) A service area has 1000 service connections. What can we estimate the population of this service area to be? - Correct Answers ✅✅3, (multiply connections x 3) T/F: The State must be notified after an existing facility is changed or after construction of a new facility. - Correct Answers ✅✅False (must notify before) T/F: A Class "D" license is valid for 2 years at ground and purchase water systems with 250 connections or less. - Correct Answers ✅✅False (3 years) T/F: The physical characteristics of water are color, taste, odor, temperature, and turbidity. - Correct Answers ✅✅True An alkaline or basic solution has a pH greater than ____. - Correct Answers ✅✅ 7

TCEQ Questions 2024

T/F: The terms mg/L and ppm are not interchangeable. - Correct Answers ✅✅False (they are interchangeable) Suspended solids in water cannot be filtered out. - Correct Answers ✅✅False (they can) Solids, water hardness, pH and gases are ____ characteristics. - Correct Answers ✅✅Chemical T/F: There are 2 hydrogen atoms and 1 oxygen atom in each water molecule. - Correct Answers ✅✅True T/F: The State recommends a water pH of less than 7 to be maintained at all time. - Correct Answers ✅✅False (The state recommends a pH slightly greater than 7 and for the water to be non-corrosive.) T/F: Taste and odor can come from organisms such as vegetation, bacteria, and algae, and from certain chemicals and metals. - Correct Answers ✅✅True T/F: The deeper the well, the warmer the water. - Correct Answers ✅✅True

TCEQ Questions 2024

T/F: The threshold odor number (TON) relates to the number of dilutions needed for the water to be tasteless. - Correct Answers ✅✅False (It reflects the number of dilutions needed for water sample to be odorless) One part per million or 1 mg/L means that for every ____ pounds of water there is one pound of material in it. - Correct Answers ✅✅ 1 million The State requires filtered water to be equal to or less than ____ turbidity units in at least 95% of the monthly samples. - Correct Answers ✅✅0. The State recommends a TON of ___ or less. - Correct Answers ✅✅ 3 T/F: The State recommends 20 color units or less for a quality water. - Correct Answers ✅✅False (The state recommends 15 units of color or less for drinking water.) T/F: Examples of inorganic matter found in water include rock, sand, metals, and minerals. - Correct Answers ✅✅True

TCEQ Questions 2024

T/F: The red color caused by iron is an example of suspended or apparent color and it can be removed by filtration. - Correct Answers ✅✅True Excessive calcium and _____ are the primary cause of hardness in water. - Correct Answers ✅✅Magnesium T/F: The State recommends a maximum total dissolved solids content of 500 mg/L - Correct Answers ✅✅False (The state recommends that TDS not exceed 1000 mg/L) There are 3 common gases found in water: methane, carbon dioxide, and __________ ___________. - Correct Answers ✅✅hydrogen sulfide T/F: Turbidity must be limited because it shelters and nourishes bacteria and interferes with disinfection. - Correct Answers ✅✅True T/F: Bleach or alcohol require less contact time than flaming to disinfect a faucet. - Correct Answers ✅✅False (flaming requires less contact time) T/F: The "primary limits" refer to chemicals with maximum contaminant levels that can be exceeded. - Correct Answers ✅✅False

TCEQ Questions 2024

(refers to chemicals with maximum contaminant levels (MCLs) that CANNOT be exceeded.) T/F: The term "total coliform" means fecal and non-fecal coliform. - Correct Answers ✅✅True T/F: Pathogens are disease-causing microorganisms. - Correct Answers ✅✅True If a routine sample is positive, flush the positive sample point, check the chlorine residual, then resample within 24 days of notification. - Correct Answers ✅✅False (If a routine sample is total coliform-positive, the PWS should flush the positive sample point, check the chlorine residual, then resample within 24 hrs of notification) To prevent the formation of THMS in surface water, chlorine is combined with _____ forming chloramine, combined chlorine residual.

• Correct Answers ✅✅Ammonia If there is no chlorine ______ at a faucet, do not sample, flush longer. - Correct Answers ✅✅residual T/F: All repeat samples must be collected on successive days. - Correct Answers ✅✅False (Collect all repeat sample on the same day)

TCEQ Questions 2024

In the event of distribution pressure below ___ psi, _______ outages, repeated bad samples or chlorine _____ below minimum, special precautions must be instituted. - Correct Answers ✅✅20/water/residual Get the sample to the lab within ___________ or it will be rejected. - Correct Answers ✅✅30 hours (for BacT samples) At 0.8 - 1.0 mg/L, fluoride reduces dental cavities, but in higher doeses (>2.0 mg/L) can cause _____ of teeth over time. - Correct Answers ✅✅mottling T/F: One by-product of chlorinated drinking water is trihalomethane, a suspected carcinogen. - Correct Answers ✅✅True Repeat samples must be taken at (a) the _______ ______ (b) within 5 connections upstream and (c) within 5 connections downstream. - Correct Answers ✅✅positive point T/F: If you do not fill out the submission form completely, you risk losing credit for the sample. - Correct Answers ✅✅True

TCEQ Questions 2024

T/F: The presence of fecal coliform in a water sample indicates fecal contamination from a human or warm-blooded animal. - Correct Answers ✅✅True The purpose of the sample site plan is to assure bacteriological samples are collected from ______ service connections which are representative of the distribution system. - Correct Answers ✅✅active T/F: Keep the sample in ice or in a cooler prior to and during lab transport because heat stimulates bacterial growth. - Correct Answers ✅✅True The action level for lead is _______ mg/L and for copper it is _____ mg/L. - Correct Answers ✅✅.015 / 1. T/F: Low doses of heavy metals such as lead and copper can cause damage to the central nervous system over time. - Correct Answers ✅✅True A certain group of bacteria is used to indicate the possible presence of a pathogen--- the ________ group. - Correct Answers ✅✅Coliform Disinfection is the destruction of disease-causing microorganisms called ______. - Correct Answers ✅✅Pathogens

TCEQ Questions 2024

At room temperature chlorine is a greenish-yellow gas that is ___ times heavier than air. - Correct Answers ✅✅2. The State requires ________ to be kept in stock for disinfecting new water lines. - Correct Answers ✅✅Calcium hypochlorite T/F: Hypochlorinators consist of a mixing tank and chemical solution feed pump. - Correct Answers ✅✅True A full-face self-contained breathing apparatus or supplied air respirator must be readily accessible outside the fire station when chlorine gas is used. - Correct Answers ✅✅False (A full-face self-contained breathing apparatus (SCBA) or supplied air respirator that meets OSHA standards shall be readily accessible outside the chlorinator room when chlorine gas is used.) T/F: All public water systems must have chlorination facilities. - Correct Answers ✅✅True If chlorine enters the eyes, flush with running cool water for at least ___ minutes and seek medical attention. - Correct Answers ✅✅ 15 minutes

TCEQ Questions 2024

Liquid bleach used in PWS must be ______ approved. - Correct Answers ✅✅NSF T/F: Primary components of a gas feed chlorinator include an injector, flowrate controller, rotameter, and mixing tank. - Correct Answers ✅✅False (injector, vacuum regulator, flowrate controller, rotameter- not a mixing tank) The maximum sustained gas withdrawal rate for pressure transmission 150 lb cylinders is ____ lbs/day - Correct Answers ✅✅ 40 T/F: Utility operators use chlorine in three commercial forms:

1. pure chlorine in the liquid or gas state
2. bleach solutions
3. granular/tablet compounds - Correct Answers ✅✅True T/F: If chlorine contacts the skin, flush with an emergency shower or garden hose for at least an hour. - Correct Answers ✅✅False ( minutes) Hypochlorous acid is the disinfectant and the _____ residual. - Correct Answers ✅✅Free

TCEQ Questions 2024

If a major chlorine leak occurs, call the supplier and ______. - Correct Answers ✅✅TCEQ The rotameter indicates the feed rate in _____ per day - Correct Answers ✅✅pounds T/F: Chlorine reacts with hydrocarbons producing heat or fire - Correct Answers ✅✅True Chlorinator rooms must be provided with facilities from determining the amount of disinfectant used _______ - Correct Answers ✅✅daily T/F: Dosage is the amount of chlorine applied in milligrams per liter or parts per billion. - Correct Answers ✅✅False (parts per million) DPD reacts with chlorine producing a pink to ____ color. - Correct Answers ✅✅red T/F: Residual is the amount of chlorine left after the demand is met. - Correct Answers ✅✅True (Dosage: How much Cl you put in the system, Demand: How much Cl is used by the system, Residual: How much Cl is left over)

TCEQ Questions 2024

T/F: TCEQ requires a faucet for raw water sampling on the discharge pipe of each PWS well. - Correct Answers ✅✅True Permeability is the ability to _____ water through the aquifer. - Correct Answers ✅✅transmit T/F: The difference between the static level and pumping level is call the drawdown. - Correct Answers ✅✅True Wells dug into artesian aquifers are considered _____ wells. - Correct Answers ✅✅deep The well screen prevents _____ from entering the well. - Correct Answers ✅✅sand T/F: Treatment of corrosive groundwater can be accomplished by adding alkalinity as lime or soda ash to adjust the pH. - Correct Answers ✅✅True T/F: The line shaft turbine is driven by a motor located above the pump at ground level. - Correct Answers ✅✅True

TCEQ Questions 2024

T/F: Well casing supports the bore hole and helps protect the aquifer from contamination. - Correct Answers ✅✅True T/F: The State requires a physical and chemical analysis of the water after 24 hours of pumping. - Correct Answers ✅✅False (36 hours) T/F: Some artesian aquifer recharge areas (outcrop) are located many miles away from the well development site. - Correct Answers ✅✅True (Artesian Wells can be recharged from many miles away) A BacT sample, taken from a newly constructed well, on ____ consecutive days, must show negative results. - Correct Answers ✅✅ 3 Water in an aquifer is called _____ water. - Correct Answers ✅✅ground T/F: A sanitary control easement covering land within 1500 feet of a public well must be recorded in county courthouse records. - Correct Answers ✅✅False (150 feet) The casing must extend at least ____ inches above the floor of the pump room or ground surface. - Correct Answers ✅✅ 18

TCEQ Questions 2024

T/F: Aquifers sandwiched between impermeable layers of rock or clay are called confined aquifers or artesian aquifers. - Correct Answers ✅✅True Three ways to measure water levels is the wetted tape, electric sounder, and the ______. - Correct Answers ✅✅airline (most often used) A well drilled into a water table aquifer is usually a ______ well. - Correct Answers ✅✅Shallow Abandoned wells, not plugged, within ___ mile of a proposed well site must be reported to TCEQ. - Correct Answers ✅✅1/ The State requires wells be protected by ______-______ fences or locked well houses. - Correct Answers ✅✅Intruder-resistant Groundwater is usually clear and void of __________. - Correct Answers ✅✅bacteria TCEQ defines "complete treatment" as the following sequence of processes: pretreatment disinfection, taste and odor control, continuous coagulation, filtration, sedimentation, terminal disinfection, and covered storage. - Correct Answers ✅✅False

TCEQ Questions 2024

(1. Pretreatment disinfection

2. Taste and odor control
3. Continuous coagulation 4. Sedimentation 5. Filtration
4. Terminal disinfection
5. Covered storage) T/F: Most solids should be removed in the filtration step. - Correct Answers ✅✅False (Sedimentation) T/F: TCEQ requires filtered water to be 0.3 NTUs or less in at least 95% of measurements each month. - Correct Answers ✅✅True Destratification is the mixing of lake water by compressed air to prevent layers of different __________ from developing. - Correct Answers ✅✅temperature All PWS in Texas are required to use ________ as the final disinfectant.

• Correct Answers ✅✅chlorine

TCEQ Questions 2024

T/F: Powdered activated carbon (PAC) is commonly used to treat iron and manganese. - Correct Answers ✅✅False (removes the tastes and odors usually caused by dead and decaying algae and vegetation) A restricted zone of ______ ft radius from the raw water intake must be established and recreational activities and trespassing shall be prohibited. - Correct Answers ✅✅ 200 T/F: The Rio Grande River is the longest river in Texas, stretching 250 miles along the Mexico border. - Correct Answers ✅✅False ( miles) T/F: Filtration is the first step in the removal of suspended solids. - Correct Answers ✅✅False (Sedimentation) Surface water is usually low in ________ and ________. - Correct Answers ✅✅minerals / gases Chemical dosage, water temperature, pH, _______, and the characteristics of the raw water all have an effect on the coagulation process. - Correct Answers ✅✅mixing The two pathogenic protozoans resistant to chlorination are: ________ and _________ - Correct Answers ✅✅giardia / cryptosporidium

TCEQ Questions 2024

T/F: Bacteria, algae, and turbidity can be a problem in surface water as can be municipal, industrial and agricultural pollution. - Correct Answers ✅✅True T/F: Coagulation works by the bonding of negatively charged turbidity to positively charged chemical coagulants. - Correct Answers ✅✅True T/F: Turbidity can shelter bacteria from the disinfection process. - Correct Answers ✅✅True _______ is the last treatment step before storage. - Correct Answers ✅✅Disinfection T/F: Treated water is stored at the plant in a tank called a clear well. - Correct Answers ✅✅True The process of separating floc from water by gravity is called: __________ - Correct Answers ✅✅sedimentation Filtration is the last barrier between the public and _______ or ________. - Correct Answers ✅✅giardia / cryptosporidium

TCEQ Questions 2024

T/F: If the media collects in the wash water troughs, the wash rate is too high. - Correct Answers ✅✅True T/F: A check valve located on the discharge side of a pump is an isolating valve that allows water to flow one direction only. - Correct Answers ✅✅False (it is a controlling valve) T/F: The total dynamic head a pump must overcome is the distance from the water level on the suction side of the pump to the top of the water level on the discharge side of the pump and includes any friction and head loss encountered. - Correct Answers ✅✅True Dead-end mains must be provided with ________ - Correct Answers ✅✅Flush valves T/F: Common cross connections include a garden hose connected to a potable water source and submerged in a stock tank, a home served by a city water supply and private well, and a chemical container connected to a potable water supply. - Correct Answers ✅✅True T/F: If a repaired main must be returned to service quickly, does with 50 mg/L for 30 minutes. - Correct Answers ✅✅False (500 mg/L)

TCEQ Questions 2024

T/F: TCEQ requires at least 1 BacT sample for each 1000 ft of new main.

• Correct Answers ✅✅True Pipe and fittings must not contain more than ____% lead or solder/flux containing more than ___% lead. - Correct Answers ✅✅0.25% 0.2% The _________ is TCEQ's first choice to be used for backflow prevention when health hazards are involved. - Correct Answers ✅✅air gap Service tap components usually include a tapping saddle, corporation stop, service line tubing, curb stop, and _______. - Correct Answers ✅✅meter T/F: A distribution system without dead ends is called an open system - Correct Answers ✅✅False (looped system) An intruder-resistant fence with lockable gates must enclose the storage site. - Correct Answers ✅✅True T/F: Ground water supply systems serving more than 50 connections must have a -ground (total) storage capacity of 200 gallons per connection and

TCEQ Questions 2024

-elevated storage capacity of 100 gallons per connection or -pressure tank capacity of 20 gallons per connection. - Correct Answers ✅✅True The system must maintain a minimum pressure of ____ psi under normal conditions and at least _____ psi during emergencies. - Correct Answers ✅✅35 / 20 The primary advantage of elevated storage is that pressure is ___________ when supply pumps are off or electrical power is lost. - Correct Answers ✅✅maintained Stored water can meet sudden demands such as fire, absorb pressure surges, provide detention/contact time for ________, and allow for expansion of the distribution system. - Correct Answers ✅✅chlorination T/F: Methods of fighting corrosion include coatings, temperature adjustment, and cathodic protection. - Correct Answers ✅✅False (pH adjustment, Orthophosphates, Poly-pigs) T/F: The most common design for residential service is the positive replacement meter. - Correct Answers ✅✅False

TCEQ Questions 2024

T/F: The curb stop connects the main service line and the corporation stop isolates the meter for repair or replacement - Correct Answers ✅✅False (The corporation stop connects to the city main and the curb stop is used to isolate the meter for repair) T/F: Close a fire hydrant slowly or a water log could occur. - Correct Answers ✅✅False To help safeguard against electrocution or machine injury, a safety program should have a ___________ policy. - Correct Answers ✅✅lockout / tagout Install all _______ from the top down and remove from the bottom up.

• Correct Answers ✅✅shoring T/F: Before digging, notify underground utilities. - Correct Answers ✅✅True The Texas Hazard Communication Act requires employers to provide Safety Data Sheets (SDS) for hazardous ______ used in the workplace. - Correct Answers ✅✅chemicals T/F: Barricade stripes must slope downward at 30 degrees in the direction the traffic is to pass. - Correct Answers ✅✅False (45 degrees)

TCEQ Questions 2024

T/F: Training in the hazardous chemicals must be taken only once a year. - Correct Answers ✅✅False The STOP/SLOW paddle should be the ______ traffic control device. - Correct Answers ✅✅primary T/F: Flashing lights must be yellow and are excellent for attracting a driver's attention toward a potential hazard. - Correct Answers ✅✅True T/F: A confined space entry program should identify confined spaces, establish a permit system, train personnel, provide safety equipment and develop rescue procedures. - Correct Answers ✅✅True The State allows utility works to use _______ control devices at work sites provided the devices conform to current manual criteria. - Correct Answers ✅✅traffic Generally, signs should be located on the right-hand side of the road and mounted on supports, posts, or __________ - Correct Answers ✅✅barricades

TCEQ Questions 2024

The least stable soil type is _________ - Correct Answers ✅✅Type C A good safety program should have management leadership, employee participation, hazard identification, training, and ____________. - Correct Answers ✅✅equipment T/F: A competent person should inspect the cave-in protection at least daily. - Correct Answers ✅✅True T/F: The Texas Hazard Communication Act is known as the "Right to Risk Law" - Correct Answers ✅✅False ("Right to Know") A confined space entry team consists of a supervisor, an attendant, and an authorized _________. - Correct Answers ✅✅entrant Oxygen deficiency is considered to be less than ____% oxygen. - Correct Answers ✅✅19.5 T/F: Limit flag use to emergency situations and at locations controlled by a single flagger. - Correct Answers ✅✅True The spoil should be placed no closer than ___ft from the edge of the excavation. - Correct Answers ✅✅2 ft