TCEQ CLASS C WATER FINAL PAPER QUESTIONS AND
ANSWERS GRADED A++
✔✔If an operator enters a well house and hears a noise coming from the pump that
sounds like pinging or gravel being pumped; more than likely the pump has- -
✔✔Cavitation
✔✔If 2 towers are connected in your system what valve would be best used? -
✔✔Altitude
✔✔An altitude valve is used to- - ✔✔Control the water elevation in an elevated storage
tank.
✔✔Two pressure gauges at the foot of two storage tanks are at the same elevation. The
water levels in the two tanks are the same, but tank X holds 1,000,000 gallons of water
and tank Y holds 500,000 gallons. The gauge on tank X will have a reading of- - ✔✔The
same as that of tank Y
✔✔From the center line of pump outlet to the highest pumping altitude is considered- -
✔✔Head
✔✔What is an approved TCEQ method to prevent cross connection? - ✔✔Air Gap
✔✔what is the only approved method for cross-connection control? - ✔✔an air gap
✔✔After installation or repair of a water line it should be treated with- - ✔✔50mg/L of
chlorine for 24hrs
✔✔When you install a new line what is the proper procedure to put in service? -
✔✔Pressure test, flush, chlorinate, flush, sample
✔✔When a section of water main is replaced, any organic material allowed to remain
inside the pipe will- - ✔✔Increase chlorine demand, and decrease chlorine residual.
✔✔What can cause pump vibration? - ✔✔Misalignment
✔✔What is the best way to prolong this life of a centrifugal pump? - ✔✔Power and
sizing
✔✔What is the best thing to do for digging in soil type C? - ✔✔1.5:1 slope
✔✔The indicator organisms used to determine contamination of drinking water are? -
✔✔Coliform group
, ✔✔When operating valves you don't want to operate to fast closing or opening why? -
✔✔Because of water hammer.
✔✔What is the main cause of line breaks? - ✔✔Improper bedding and back fill.
✔✔What is it called when cl2 is used in the system? - ✔✔Demand
✔✔The difference between the amount of chlorine added to water and the amount of
residual chlorine at the end of a specified contact time is called what? - ✔✔Chlorine
demand
✔✔The most common use of chlorine in water treatment is what? - ✔✔Disinfectant
✔✔A pump may be damaged if it started with the discharge valve closed, and the pump
is a(n)- - ✔✔positive displacement pump
✔✔Velocity of flow in water mains is usually expressed in terms of- - ✔✔Feet per
second
✔✔The most important factor affecting the useful life of piping is the ability of that piping
to resist what? - ✔✔Internal and external corrosion
✔✔How frequently are you supposed to flush dead ends? - ✔✔Monthly
✔✔What do you do to prevent a break in the service line when installing? - ✔✔Goose
neck
✔✔What does water weigh in the terms of lbs/gallon - ✔✔8.34lb/gal
✔✔If the pressure gauge at the bottom of a 200ft. standpipe reads 68 psi, what is the
static head in feet? - ✔✔157ft
✔✔A centrifugal pump when operating normally shows a discharge pressure of 100psi
and the venture meter shows a flow rate of 20,000gpm. Suddenly the pressure gauge
drops to 90psi and the flow rate increases to 23,000gpm. You would suspect- - ✔✔A
large leak in the pump discharge line.
✔✔What causes red water? - ✔✔Suspended iron
The iron bacteria Crenothrix
Unlined steel pipe
ANSWERS GRADED A++
✔✔If an operator enters a well house and hears a noise coming from the pump that
sounds like pinging or gravel being pumped; more than likely the pump has- -
✔✔Cavitation
✔✔If 2 towers are connected in your system what valve would be best used? -
✔✔Altitude
✔✔An altitude valve is used to- - ✔✔Control the water elevation in an elevated storage
tank.
✔✔Two pressure gauges at the foot of two storage tanks are at the same elevation. The
water levels in the two tanks are the same, but tank X holds 1,000,000 gallons of water
and tank Y holds 500,000 gallons. The gauge on tank X will have a reading of- - ✔✔The
same as that of tank Y
✔✔From the center line of pump outlet to the highest pumping altitude is considered- -
✔✔Head
✔✔What is an approved TCEQ method to prevent cross connection? - ✔✔Air Gap
✔✔what is the only approved method for cross-connection control? - ✔✔an air gap
✔✔After installation or repair of a water line it should be treated with- - ✔✔50mg/L of
chlorine for 24hrs
✔✔When you install a new line what is the proper procedure to put in service? -
✔✔Pressure test, flush, chlorinate, flush, sample
✔✔When a section of water main is replaced, any organic material allowed to remain
inside the pipe will- - ✔✔Increase chlorine demand, and decrease chlorine residual.
✔✔What can cause pump vibration? - ✔✔Misalignment
✔✔What is the best way to prolong this life of a centrifugal pump? - ✔✔Power and
sizing
✔✔What is the best thing to do for digging in soil type C? - ✔✔1.5:1 slope
✔✔The indicator organisms used to determine contamination of drinking water are? -
✔✔Coliform group
, ✔✔When operating valves you don't want to operate to fast closing or opening why? -
✔✔Because of water hammer.
✔✔What is the main cause of line breaks? - ✔✔Improper bedding and back fill.
✔✔What is it called when cl2 is used in the system? - ✔✔Demand
✔✔The difference between the amount of chlorine added to water and the amount of
residual chlorine at the end of a specified contact time is called what? - ✔✔Chlorine
demand
✔✔The most common use of chlorine in water treatment is what? - ✔✔Disinfectant
✔✔A pump may be damaged if it started with the discharge valve closed, and the pump
is a(n)- - ✔✔positive displacement pump
✔✔Velocity of flow in water mains is usually expressed in terms of- - ✔✔Feet per
second
✔✔The most important factor affecting the useful life of piping is the ability of that piping
to resist what? - ✔✔Internal and external corrosion
✔✔How frequently are you supposed to flush dead ends? - ✔✔Monthly
✔✔What do you do to prevent a break in the service line when installing? - ✔✔Goose
neck
✔✔What does water weigh in the terms of lbs/gallon - ✔✔8.34lb/gal
✔✔If the pressure gauge at the bottom of a 200ft. standpipe reads 68 psi, what is the
static head in feet? - ✔✔157ft
✔✔A centrifugal pump when operating normally shows a discharge pressure of 100psi
and the venture meter shows a flow rate of 20,000gpm. Suddenly the pressure gauge
drops to 90psi and the flow rate increases to 23,000gpm. You would suspect- - ✔✔A
large leak in the pump discharge line.
✔✔What causes red water? - ✔✔Suspended iron
The iron bacteria Crenothrix
Unlined steel pipe
