1 of 91
Term
Which of the following backflow conditions poses the greatest risk
to public health?
A. turning off the water supply to a single-story residence.
B. a vacuum produced by closing a valve.
C. turning off the water supply to a multi-story building.
D. a vacuum produced by water hammer
Give this one a try later!
B. household fixtures become D. submerge the burned area in
stained. cold water
A. vertical space of twice the
B. a vacuum produced by
diameter but no less than 1 inch
closing a valve.
(2.54 cm)
Don't know?
, 2 of 91
Term
What mineral (other than iron) usually occurs in low concentrations
in natural water and causes problems on bathroom fixtures or
fabrics.
A. magnesium
B. manganese
C. aluminum
D. compound meter
Give this one a try later!
A. venturi meter B. water hammer
A. magnesium D. proper sanitary seal
Don't know?
, 3 of 91
Term
Which of the following is the best way to stop a chlorine leak at a
valve stem?
A. patch the leak with a patch kit
B. tighten the packing nut.
C. patch the leak with solder
D. tighten the flange bolt.
Give this one a try later!
C. constant at a constant speed B. tighten the packing nut.
C. reinforced concrete pipe. B. water hammer
Don't know?
4 of 91
Term
In addition to corrective maintenance, which of the following are
two other common types of maintenance.
A. predictive and preventive maintenance
B. monthly and annual maintenance
C. breakdown and reactive maintenance
D. scheduled and unscheduled maintenance.
, Give this one a try later!
A. predictive and preventive A. formation of chloro-organic
maintenance compounds
A. excessive wear of the impeller
A. increase approximately twice
and or wear ring.
Don't know?
5 of 91
Term
Sodium thiosulfate is added to a microbiological sample bottle in
order to.
A. ensure sterilization of the sample bottle.
B. react with the nitrates that interfere with the mpn test.
C. remove any chlorine residual present.
D. extend the allowable holding time from 6 to 30 hours
Give this one a try later!
D. at least 2 pipe diameters above B. locate and sound all hydrants in
the outlet the survey area.
A. formation of chloro-organic C. remove any chlorine
compounds residual present.
Don't know?
Term
Which of the following backflow conditions poses the greatest risk
to public health?
A. turning off the water supply to a single-story residence.
B. a vacuum produced by closing a valve.
C. turning off the water supply to a multi-story building.
D. a vacuum produced by water hammer
Give this one a try later!
B. household fixtures become D. submerge the burned area in
stained. cold water
A. vertical space of twice the
B. a vacuum produced by
diameter but no less than 1 inch
closing a valve.
(2.54 cm)
Don't know?
, 2 of 91
Term
What mineral (other than iron) usually occurs in low concentrations
in natural water and causes problems on bathroom fixtures or
fabrics.
A. magnesium
B. manganese
C. aluminum
D. compound meter
Give this one a try later!
A. venturi meter B. water hammer
A. magnesium D. proper sanitary seal
Don't know?
, 3 of 91
Term
Which of the following is the best way to stop a chlorine leak at a
valve stem?
A. patch the leak with a patch kit
B. tighten the packing nut.
C. patch the leak with solder
D. tighten the flange bolt.
Give this one a try later!
C. constant at a constant speed B. tighten the packing nut.
C. reinforced concrete pipe. B. water hammer
Don't know?
4 of 91
Term
In addition to corrective maintenance, which of the following are
two other common types of maintenance.
A. predictive and preventive maintenance
B. monthly and annual maintenance
C. breakdown and reactive maintenance
D. scheduled and unscheduled maintenance.
, Give this one a try later!
A. predictive and preventive A. formation of chloro-organic
maintenance compounds
A. excessive wear of the impeller
A. increase approximately twice
and or wear ring.
Don't know?
5 of 91
Term
Sodium thiosulfate is added to a microbiological sample bottle in
order to.
A. ensure sterilization of the sample bottle.
B. react with the nitrates that interfere with the mpn test.
C. remove any chlorine residual present.
D. extend the allowable holding time from 6 to 30 hours
Give this one a try later!
D. at least 2 pipe diameters above B. locate and sound all hydrants in
the outlet the survey area.
A. formation of chloro-organic C. remove any chlorine
compounds residual present.
Don't know?
