TEXAS WASTEWATER CLASS D NEWEST
ACTUAL EXAM COMPLETE QESTIONS
AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY
GRADED A+
_____ allows uniform pump rates, supplies water for firefighting, and provides time for
disinfection. - ANSWERS✔-Storage
\Q\._____ and _____ and other minerals cause hardness in water. - ANSWERS✔-Calcium and
magnesium
\Q\._____ are underground, water-bearing formations yielding useful quantities of water. -
ANSWERS✔-Aquifers
\Q\._____ can adapt to conditions that would kill a human. - ANSWERS✔-Cockroaches
\Q\._____ cause small particles in water to clot together forming floc, and this process,
flocculation, forms larger particles that settle more readily. - ANSWERS✔-Coagulants
\Q\._____ facilities equalize demand on the water supply. - ANSWERS✔-Storage
\Q\._____ fecal matter entering a water supply transmits pathogens to healthy people. -
ANSWERS✔-Infected
,\Q\._____ is a process that forces water through a membrane. - ANSWERS✔-Reverse osmosis
\Q\._____ is a tank, usually steel, supported aboveground on a tower. - ANSWERS✔-Elevated
storage
\Q\._____ is an electrochemical method of preventing corrosion of the interior of metal tanks. -
ANSWERS✔-Cathodic protection
\Q\._____ is put into bacteriological sample bottles to dechlorinate the water. - ANSWERS✔-
Sodium thiosulfate
\Q\._____ is the amount of suspended matter such as clay, silt, organic matter, and
microorganisms in the water. - ANSWERS✔-Turbidity
\Q\._____ is the final step in removing suspended matter and chlorine-resistant
microorganisms. - ANSWERS✔-Filtering
\Q\._____ is the force the pump works against. - ANSWERS✔-Head
\Q\._____ must be notified about changes to public water systems involving water source,
water quality, and health hazards. - ANSWERS✔-The state
\Q\._____ occurs inside the pump volute or casing and is caused by insufficient pressure on the
suction side of the pump, which creates a vacuum and causes water vapor bubbles to form. -
ANSWERS✔-Cavitation
\Q\._____ solves problems of taste, odor, red water, or bad samples. - ANSWERS✔-Flushing
,\Q\._____ tests help the operator determine the chemical and dosage to apply. - ANSWERS✔-
Jar tests
\Q\._____ valves cut off sections of a system. - ANSWERS✔-Isolating valves
\Q\._____ water comes from rivers, lakes, and reservoirs. - ANSWERS✔-Surface
\Q\._____ water means the water is free of disease-causing organisms, has a chlorine residual,
and is safe for human consumption. - ANSWERS✔-Potable
\Q\.________ is a buildup of oxidized iron, calcium carbonate, or other chemicals in mains. -
ANSWERS✔-Tuberculation
\Q\._____% of public water systems use surface water. - ANSWERS✔-40%
\Q\."Stuffers" sent to customers in billing statements may contain ________.
a. departments to call for service
b. explanations of utility policy
c. a history of the utility
d. tips on water conservation
e. all the above - ANSWERS✔-e. all of the above
\Q\.A _____ is 1) large enough to enter and do work; 2) has limited or restricted entry or exit;
and 3) is not designed for continuous occupancy. - ANSWERS✔-confined space
, \Q\.A _____ is a physical connection between a public water supply, and 1) another supply of
unknown or questionable quality, 2) any source that may contain contamination, 3) any water
treated to a lesser degree. - ANSWERS✔-cross connection
\Q\.A _____ is a tank resting on the ground that is greater in height than diameter. -
ANSWERS✔-standpipe
\Q\.A 100-lb container of calcium hypochlorite (65%) contains 65 lbs of chlorine and _____ lbs
of lime. - ANSWERS✔-25 lbs of lime
\Q\.A common filter is the slow sand filter, having several layers of differently sized media.
(true/false) - ANSWERS✔-false (the rapid sand filter)
\Q\.A common filter problem is ________, prevented by proper backwashing. - ANSWERS✔-
mud balls
\Q\.A federal agency impacting the water utility industry is the _____. - ANSWERS✔-EPA
\Q\.A filter must be _____ when a head loss of 6 to 10 feet occurs. - ANSWERS✔-backwashed
\Q\.A gallon of bleach containing 5.25% sodium hypochlorite contains about _____ lbs of
chlorine. - ANSWERS✔-0.44 lbs
\Q\.A gallon of water weighs _____ pounds and 1 mg/L equals one ________. - ANSWERS✔-
water weights 8.34 pounds
1 mg/L equals one part per million
\Q\.A maximum allowable slope of 45° and a run to rise of 1:1 is for soil type ________.
ACTUAL EXAM COMPLETE QESTIONS
AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY
GRADED A+
_____ allows uniform pump rates, supplies water for firefighting, and provides time for
disinfection. - ANSWERS✔-Storage
\Q\._____ and _____ and other minerals cause hardness in water. - ANSWERS✔-Calcium and
magnesium
\Q\._____ are underground, water-bearing formations yielding useful quantities of water. -
ANSWERS✔-Aquifers
\Q\._____ can adapt to conditions that would kill a human. - ANSWERS✔-Cockroaches
\Q\._____ cause small particles in water to clot together forming floc, and this process,
flocculation, forms larger particles that settle more readily. - ANSWERS✔-Coagulants
\Q\._____ facilities equalize demand on the water supply. - ANSWERS✔-Storage
\Q\._____ fecal matter entering a water supply transmits pathogens to healthy people. -
ANSWERS✔-Infected
,\Q\._____ is a process that forces water through a membrane. - ANSWERS✔-Reverse osmosis
\Q\._____ is a tank, usually steel, supported aboveground on a tower. - ANSWERS✔-Elevated
storage
\Q\._____ is an electrochemical method of preventing corrosion of the interior of metal tanks. -
ANSWERS✔-Cathodic protection
\Q\._____ is put into bacteriological sample bottles to dechlorinate the water. - ANSWERS✔-
Sodium thiosulfate
\Q\._____ is the amount of suspended matter such as clay, silt, organic matter, and
microorganisms in the water. - ANSWERS✔-Turbidity
\Q\._____ is the final step in removing suspended matter and chlorine-resistant
microorganisms. - ANSWERS✔-Filtering
\Q\._____ is the force the pump works against. - ANSWERS✔-Head
\Q\._____ must be notified about changes to public water systems involving water source,
water quality, and health hazards. - ANSWERS✔-The state
\Q\._____ occurs inside the pump volute or casing and is caused by insufficient pressure on the
suction side of the pump, which creates a vacuum and causes water vapor bubbles to form. -
ANSWERS✔-Cavitation
\Q\._____ solves problems of taste, odor, red water, or bad samples. - ANSWERS✔-Flushing
,\Q\._____ tests help the operator determine the chemical and dosage to apply. - ANSWERS✔-
Jar tests
\Q\._____ valves cut off sections of a system. - ANSWERS✔-Isolating valves
\Q\._____ water comes from rivers, lakes, and reservoirs. - ANSWERS✔-Surface
\Q\._____ water means the water is free of disease-causing organisms, has a chlorine residual,
and is safe for human consumption. - ANSWERS✔-Potable
\Q\.________ is a buildup of oxidized iron, calcium carbonate, or other chemicals in mains. -
ANSWERS✔-Tuberculation
\Q\._____% of public water systems use surface water. - ANSWERS✔-40%
\Q\."Stuffers" sent to customers in billing statements may contain ________.
a. departments to call for service
b. explanations of utility policy
c. a history of the utility
d. tips on water conservation
e. all the above - ANSWERS✔-e. all of the above
\Q\.A _____ is 1) large enough to enter and do work; 2) has limited or restricted entry or exit;
and 3) is not designed for continuous occupancy. - ANSWERS✔-confined space
, \Q\.A _____ is a physical connection between a public water supply, and 1) another supply of
unknown or questionable quality, 2) any source that may contain contamination, 3) any water
treated to a lesser degree. - ANSWERS✔-cross connection
\Q\.A _____ is a tank resting on the ground that is greater in height than diameter. -
ANSWERS✔-standpipe
\Q\.A 100-lb container of calcium hypochlorite (65%) contains 65 lbs of chlorine and _____ lbs
of lime. - ANSWERS✔-25 lbs of lime
\Q\.A common filter is the slow sand filter, having several layers of differently sized media.
(true/false) - ANSWERS✔-false (the rapid sand filter)
\Q\.A common filter problem is ________, prevented by proper backwashing. - ANSWERS✔-
mud balls
\Q\.A federal agency impacting the water utility industry is the _____. - ANSWERS✔-EPA
\Q\.A filter must be _____ when a head loss of 6 to 10 feet occurs. - ANSWERS✔-backwashed
\Q\.A gallon of bleach containing 5.25% sodium hypochlorite contains about _____ lbs of
chlorine. - ANSWERS✔-0.44 lbs
\Q\.A gallon of water weighs _____ pounds and 1 mg/L equals one ________. - ANSWERS✔-
water weights 8.34 pounds
1 mg/L equals one part per million
\Q\.A maximum allowable slope of 45° and a run to rise of 1:1 is for soil type ________.
