Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
1. Water with a negative Langlier Index would be likely to Dissolve material from the
________ interior walls of a metal
pipe
Dissolve material from the interior walls of a metal
pipe
Deposit a scale on the interior walls of a metal pipe.
Raise the temperature and turbidity of the water.
All of the above
2. Ladders must be placed within _____ feet of workers in 25
a trench?
15 ft
25 ft
35 ft
50 ft
3. The Groundwater Rule of 2009 requires that samples Source water
for 'fecal indicators' be collected from the ________
All TCR distribution system locations
Filter effluent
Point of entry
Source water
4. Manganese
, Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
A black stain on plumbing fixtures may be caused by
_____ in the water?
Calcium
Lead
Magnesium
Manganese
5. According to the Interim Enhanced Surface Water 1.0
Treatment Rule (IESWTR) what is the maximum com-
bined effluent turbidity allowed for both direct and
conventional treatment?
0.15 NTU
0.30 NTU
0.50 NTU
1.0 NTU
6. If the finished water pH is increased from 7.0 to 8.5 Less effective
to improve corrosion control, the disinfection system
using chlorine gas is ________.
More effective
Should be useless chlorine
Less effective
, Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
Is not affected because of the chlorine gas
7. Why are fusible plugs used on all chlorine cylinders? To prevent the cylinder
from exploding due to
They are used to turn the cylinder high temperatures
Fusible plugs prevent gas leaks during a fire
To prevent the cylinder from exploding due to high
temperatures
Fusible plugs are used for electrical heat tape connec-
tion to prevent line freezing
8. As long as free chlorine and organic precursors are increase
available, the total trihalomethane (TTHM) production
will most likely ____?
9. What are the six typical mechanical sludge drying sys- Belt filter press, belt thick-
tems ener, drum thickener, cen-
trifuge, plate and frame
Belt filter press, belt thickener, drum thickener, cen- press, and lamella thicken-
trifuge, plate and frame press, and lamella thickener er
Drying beds, belt thickener, drum thickener, cen-
trifuge, plate and frame press, and lamella thickener
Drying beds, belt filter press, belt thickener, centrifuge,
plate and frame press, and lamella thickener
Drying beds, belt filter press, belt thickener, drum
thickener, centrifuge, plate and frame press.
, Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
10. When handling acids, you should always __________. Add acids to water
Add water to acids
Mix with strong bases
Carefully mouth pipette acids
Add acids to water
11. A foul, rotten-egg odor from an aeration treatment Hydrogen Sulfide
unit is an indication that the source water contains?
Methane
Carbon Dioxide
Hydrogen Sulfide
Manganese
12. A confined space is large enough for employee access, Is not designed for contin-
has limited means of entry and __________ . uous occupancy
Does not contain ladders
Is not designed for continuous occupancy
Has a second means of escape
Does not contain lighting
13. Statistics show that 67% of all deaths in a confined People outside the con-
space occur when ______ fined space enter to try
Study online at https://quizlet.com/_f7wyhk
1. Water with a negative Langlier Index would be likely to Dissolve material from the
________ interior walls of a metal
pipe
Dissolve material from the interior walls of a metal
pipe
Deposit a scale on the interior walls of a metal pipe.
Raise the temperature and turbidity of the water.
All of the above
2. Ladders must be placed within _____ feet of workers in 25
a trench?
15 ft
25 ft
35 ft
50 ft
3. The Groundwater Rule of 2009 requires that samples Source water
for 'fecal indicators' be collected from the ________
All TCR distribution system locations
Filter effluent
Point of entry
Source water
4. Manganese
, Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
A black stain on plumbing fixtures may be caused by
_____ in the water?
Calcium
Lead
Magnesium
Manganese
5. According to the Interim Enhanced Surface Water 1.0
Treatment Rule (IESWTR) what is the maximum com-
bined effluent turbidity allowed for both direct and
conventional treatment?
0.15 NTU
0.30 NTU
0.50 NTU
1.0 NTU
6. If the finished water pH is increased from 7.0 to 8.5 Less effective
to improve corrosion control, the disinfection system
using chlorine gas is ________.
More effective
Should be useless chlorine
Less effective
, Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
Is not affected because of the chlorine gas
7. Why are fusible plugs used on all chlorine cylinders? To prevent the cylinder
from exploding due to
They are used to turn the cylinder high temperatures
Fusible plugs prevent gas leaks during a fire
To prevent the cylinder from exploding due to high
temperatures
Fusible plugs are used for electrical heat tape connec-
tion to prevent line freezing
8. As long as free chlorine and organic precursors are increase
available, the total trihalomethane (TTHM) production
will most likely ____?
9. What are the six typical mechanical sludge drying sys- Belt filter press, belt thick-
tems ener, drum thickener, cen-
trifuge, plate and frame
Belt filter press, belt thickener, drum thickener, cen- press, and lamella thicken-
trifuge, plate and frame press, and lamella thickener er
Drying beds, belt thickener, drum thickener, cen-
trifuge, plate and frame press, and lamella thickener
Drying beds, belt filter press, belt thickener, centrifuge,
plate and frame press, and lamella thickener
Drying beds, belt filter press, belt thickener, drum
thickener, centrifuge, plate and frame press.
, Water treatment grade 2
Study online at https://quizlet.com/_f7wyhk
10. When handling acids, you should always __________. Add acids to water
Add water to acids
Mix with strong bases
Carefully mouth pipette acids
Add acids to water
11. A foul, rotten-egg odor from an aeration treatment Hydrogen Sulfide
unit is an indication that the source water contains?
Methane
Carbon Dioxide
Hydrogen Sulfide
Manganese
12. A confined space is large enough for employee access, Is not designed for contin-
has limited means of entry and __________ . uous occupancy
Does not contain ladders
Is not designed for continuous occupancy
Has a second means of escape
Does not contain lighting
13. Statistics show that 67% of all deaths in a confined People outside the con-
space occur when ______ fined space enter to try
