CWEA Mechanical Technologist 2 Recommended
Exam (2026 Newest Update) | COMPLETE QUESTIONS
AND VERIFIED ANSWERS ALREADY GRADED A+!! |
PDF
The interior of 300 feet of 12-inch pipe is uniformly coated with one inch of
grease. How many gallons will this pipe hold when filled with water? - SELECTED
ANSWER 👀 12 inches (diameter of pipe) - 2 inches (grease on pipe) = 10 inches
Convert inches to feet:
10 inches x (1 foot / 12 inches) = 0.833 feet
Volume of a right regular cylinder:
V = 0.785 x Diameter x Diameter x Length of Pipe
V = 0.785 x 0.833 ft x 0.833 ft x 300 ft
V = 163.41 cubic feet
Convert to Gallons:
163.41 cu ft x (7.48 gal / 1 cu ft) = 1223.31 gal
Infiltration can be caused by cracked pipes, true or false? - SELECTED ANSWER 👀
True
The main reason for adding sodium hypochlorite to sewers is to control: -
SELECTED ANSWER 👀 Odor
,Roots can enter collection systems through pipe cracks, true or false? - SELECTED
ANSWER 👀 True
The lowest point on the inside of a pipeline is called the: - SELECTED ANSWER 👀
Invert
How often must an excavation site and adjacent areas be inspected for hazardous
conditions? - SELECTED ANSWER 👀 Daily
Working in an un-sloped trench with no shoring is one option of Protective
Shoring Systems, true or false? - SELECTED ANSWER 👀 False. Some options are
proper stopping or benching of the sides of the excavation, supporting the sides
of a trench with shoring, and using a shield in the excavation area.
Proper operation and maintenance of wastewater collection is keeping
wastewater flowing through pipes, true or false? - SELECTED ANSWER 👀 True
Minimum design velocity for a sewer should greater than: - SELECTED ANSWER 👀
2 feet per second
Vitrified Clay pipe is a Rigid type of pipe, true or false? - SELECTED ANSWER 👀
True
Barrels, lids, cones, and backflow devices are all included in Manholes, true or
false? - SELECTED ANSWER 👀 False. All are included except for backflow devices.
,Sewer testing methods include air, water, mandrill, and sewage, true or false? -
SELECTED ANSWER 👀 False. Sewer testing methods do not include sewage.
Using high velocity cleaners is one method included in hydraulic sewer cleaning,
true or false? - SELECTED ANSWER 👀 True
A flow of 650 gpm would be how many MGD? - SELECTED ANSWER 👀 650 gpm x
(1440 min / 1 day) = 936000 gpd
936000 x (1 MG / 1000000 gal) = 0.936 MGD
One of the advantages of using CCTV is that the length and severity of defective
pipe areas can be recorded, true or false? - SELECTED ANSWER 👀 True
Offset joints are one hazard that may damage a TV camera going through a sewer,
true or false? - SELECTED ANSWER 👀 True
What is the total volume of 1000 feet of 8 inch line? - SELECTED ANSWER 👀
Convert inches to feet:
8 inches x (1 foot / 12 inches) = 0.666
Volume of a right regular cylinder:
V = 0.785 x Diameter x Diameter x Length of Pipe
V = 0.785 x 0.666 ft x 0.666 ft x 1000 ft
V = 348.19 cu ft
Convert to gallons:
348.19 cu ft x (7.48 gal / 1 cu ft) = 2604.47 gal
, If an 8 inch force main has a metered flow rate of 400000 gpd, what is the
velocity? - SELECTED ANSWER 👀 Velocity = Flow / Area
Area = 0.785 x Diameter x Diameter
When finding Area, convert Diameter into feet
8 in x (1 ft / 12 in) = 0.667 ft
Area = 0.785 x 0.667 ft x 0.667 ft = 0.349 sq ft
Convert flow in gallons to cubic feet per second:
(400000 gal / 1 day) x (1 cu ft / 7.48 gal) x (1 day / 24 hours) x (1 hr / 60 min) x (1
min / 60 sec) = 0.619 cu fps
Velocity = 0.619 cu fps / 0.349 sq ft
Velocity = 1.77 fps
During the 24-hour operation a lift station pumped 3000 gallons per minute for a
community of 27000. What is the per capita pumped in gallons per day? -
SELECTED ANSWER 👀 GPD / Capita = Volume Pumped Per Day / Number of
people
Volume = (3000 gal / 1 min) x (60 min / 1 hr) x (24 hr / 1 day)
Volume = 4320000 gal
GPD / Capita = 4320000 gal / 27000 people
GPD / Capita = 160
A wet well 20 feet in diameter is filled with water to a depth of 10 feet. How many
gallons does the tank contain? - SELECTED ANSWER 👀 Volume = 0.785 x
Diameter x Diameter x Height
Volume = 0.785 x 20 ft x 20 ft x 10 ft
Volume = 3140 cu ft
Exam (2026 Newest Update) | COMPLETE QUESTIONS
AND VERIFIED ANSWERS ALREADY GRADED A+!! |
The interior of 300 feet of 12-inch pipe is uniformly coated with one inch of
grease. How many gallons will this pipe hold when filled with water? - SELECTED
ANSWER 👀 12 inches (diameter of pipe) - 2 inches (grease on pipe) = 10 inches
Convert inches to feet:
10 inches x (1 foot / 12 inches) = 0.833 feet
Volume of a right regular cylinder:
V = 0.785 x Diameter x Diameter x Length of Pipe
V = 0.785 x 0.833 ft x 0.833 ft x 300 ft
V = 163.41 cubic feet
Convert to Gallons:
163.41 cu ft x (7.48 gal / 1 cu ft) = 1223.31 gal
Infiltration can be caused by cracked pipes, true or false? - SELECTED ANSWER 👀
True
The main reason for adding sodium hypochlorite to sewers is to control: -
SELECTED ANSWER 👀 Odor
,Roots can enter collection systems through pipe cracks, true or false? - SELECTED
ANSWER 👀 True
The lowest point on the inside of a pipeline is called the: - SELECTED ANSWER 👀
Invert
How often must an excavation site and adjacent areas be inspected for hazardous
conditions? - SELECTED ANSWER 👀 Daily
Working in an un-sloped trench with no shoring is one option of Protective
Shoring Systems, true or false? - SELECTED ANSWER 👀 False. Some options are
proper stopping or benching of the sides of the excavation, supporting the sides
of a trench with shoring, and using a shield in the excavation area.
Proper operation and maintenance of wastewater collection is keeping
wastewater flowing through pipes, true or false? - SELECTED ANSWER 👀 True
Minimum design velocity for a sewer should greater than: - SELECTED ANSWER 👀
2 feet per second
Vitrified Clay pipe is a Rigid type of pipe, true or false? - SELECTED ANSWER 👀
True
Barrels, lids, cones, and backflow devices are all included in Manholes, true or
false? - SELECTED ANSWER 👀 False. All are included except for backflow devices.
,Sewer testing methods include air, water, mandrill, and sewage, true or false? -
SELECTED ANSWER 👀 False. Sewer testing methods do not include sewage.
Using high velocity cleaners is one method included in hydraulic sewer cleaning,
true or false? - SELECTED ANSWER 👀 True
A flow of 650 gpm would be how many MGD? - SELECTED ANSWER 👀 650 gpm x
(1440 min / 1 day) = 936000 gpd
936000 x (1 MG / 1000000 gal) = 0.936 MGD
One of the advantages of using CCTV is that the length and severity of defective
pipe areas can be recorded, true or false? - SELECTED ANSWER 👀 True
Offset joints are one hazard that may damage a TV camera going through a sewer,
true or false? - SELECTED ANSWER 👀 True
What is the total volume of 1000 feet of 8 inch line? - SELECTED ANSWER 👀
Convert inches to feet:
8 inches x (1 foot / 12 inches) = 0.666
Volume of a right regular cylinder:
V = 0.785 x Diameter x Diameter x Length of Pipe
V = 0.785 x 0.666 ft x 0.666 ft x 1000 ft
V = 348.19 cu ft
Convert to gallons:
348.19 cu ft x (7.48 gal / 1 cu ft) = 2604.47 gal
, If an 8 inch force main has a metered flow rate of 400000 gpd, what is the
velocity? - SELECTED ANSWER 👀 Velocity = Flow / Area
Area = 0.785 x Diameter x Diameter
When finding Area, convert Diameter into feet
8 in x (1 ft / 12 in) = 0.667 ft
Area = 0.785 x 0.667 ft x 0.667 ft = 0.349 sq ft
Convert flow in gallons to cubic feet per second:
(400000 gal / 1 day) x (1 cu ft / 7.48 gal) x (1 day / 24 hours) x (1 hr / 60 min) x (1
min / 60 sec) = 0.619 cu fps
Velocity = 0.619 cu fps / 0.349 sq ft
Velocity = 1.77 fps
During the 24-hour operation a lift station pumped 3000 gallons per minute for a
community of 27000. What is the per capita pumped in gallons per day? -
SELECTED ANSWER 👀 GPD / Capita = Volume Pumped Per Day / Number of
people
Volume = (3000 gal / 1 min) x (60 min / 1 hr) x (24 hr / 1 day)
Volume = 4320000 gal
GPD / Capita = 4320000 gal / 27000 people
GPD / Capita = 160
A wet well 20 feet in diameter is filled with water to a depth of 10 feet. How many
gallons does the tank contain? - SELECTED ANSWER 👀 Volume = 0.785 x
Diameter x Diameter x Height
Volume = 0.785 x 20 ft x 20 ft x 10 ft
Volume = 3140 cu ft
