Fy14 Ut Basic Chapter 8 Sewage

Front 1

8-1. How many feet away from the structure’s foundation should the house sewer extend? 1. 3 to 5 2. 1 to 3 3. 5 to 8 4. 8 to 10

Back 1

1. 3 to 5

Front 2

8-2. Which sanitary system sewer connects to a branch and has no common sewer tributary? 1. House 2. Lateral 3. Main 4. Branch

Back 2

2. Lateral

Front 3

8-3. Which sanitary system sewer contains many branches, providing an outlet for a large area? 1. Lateral 2. Forced 3. Trunk 4. Interceptor

Back 3

3. Trunk

Front 4

8-4. Forced main piping carrying sewage under pressure to a pumping station requires a minimum velocity speed of what value, in fps? 1. 1 2. 2 3. 3 4. 4

Back 4

3. 3

Front 5

8-5. Which sanitary system sewer contains the treatment plant line leading to a final disposal point? 1. Outfall 2. Trunk 3. Branch 4. Outlet

Back 5

1. Outfall

Front 6

8-6. Which construction material is NOT used in the making of manholes? 1. Brick 2. Shale concrete 3. Precast reinforced concrete 4. Concrete

Back 6

2. Shale concrete

Front 7

8-7. Which type of manhole construction material has the widest application use? 1. Precast reinforced concrete 2. Concrete 3. Precast concrete ring 4. Brick

Back 7

1. Precast reinforced concrete

Front 8

8-8. Which type of construction material is best suited for modifications to existing structures? 1. Precast reinforced concrete 2. Concrete 3. Precast concrete ring 4. Brick

Back 8

4. Brick

Front 9

8-9. Shaft type manholes can be constructed to a depth of how many feet? 1. 130 2. 140 3. 150 4. 160

Back 9

1. 130

Front 10

8-10.When a 36-inch sewer line is utilized, how many feet apart are manholes placed? 1. 300 2. 500 3. 600 4. 800

Back 10

2. 500

Front 11

8-11.Why are storm drainage systems separated from sanitary systems? 1. Storm drainage systems are normally smaller in size. 2. Storm drainage requires treatment. 3. Storm and surface drainage do not require treatment. 4. Combining systems would be too expensive.

Back 11

3. Storm and surface drainage do not require treatment.

Front 12

8-12.Within how many feet from sewer lines are tree roots a prevalent problem? 1. 100 2. 200 3. 300 4. 400

Back 12

1. 100

Front 13

8-13.What promotes the growth of sludge particles in aeration tanks? 1. Hydrogen chloride 2. Dissolved oxygen 3. Sulfur acid 4. Sodium potassium

Back 13

2. Dissolved oxygen

Front 14

8-14.What term is also used to refer to waste breakdown by microorganisms in dissolved oxygen? 1. Activated sludge process 2. Aerobic digestion 3. Anaerobic digestion 4. Activated sludge

Back 14

2. Aerobic digestion

Front 15

8-15.The process that kills essentially all pathogenic bacteria in wastewater is known as what? 1. Digestion 2. Comminution 3. Disinfection 4. Shredding

Back 15

3. Disinfection

Front 16

8-16.Which waste water treatment is used to convert suspended materials into a form more readily separated from the water being treated? 1. Preliminary 2. Shock 3. Primary 4. Secondary

Back 16

4. Secondary

Front 17

8-17.What term is used to refer to the settable solids separated from liquids during processing? 1. Sludge 2. Baffle 3. Weir 4. Floatables

Back 17

1. Sludge

Front 18

8-18.Which material is designated as domestic organic waste? 1. Vegetable packing waste 2. Fecal discharges 3. Salt brine discharges 4. Meat packing waste

Back 18

2. Fecal discharges

Front 19

8-19.What substance will decrease as a result of an increase of wastewater in a body of water? 1. Hydrogen 2. Bacteria 3. Oxygen 4. Pathogenic agents

Back 19

3. Oxygen

Front 20

8-20. The total residue of solid waste contained in wastewater is known as                solids. 1. dissolved 2. settable 3. floatable 4. total

Back 20

4. total

Front 21

8-21.(True or False) Organic material which includes vegetable matter is a type of solid material found in wastewater. 1. True 2. False 22.

Back 21

1. True

Front 22

8-22.Cesspools must be covered with plank of what minimum thickness, in inches, for prevention of breeding flies? 1. 1 2. 2 3. 3 4. 4 4

Back 22

2. 2

Front 23

8-23.How many feet apart should cesspools be constructed? 1. 5 2. 10 3. 20 4. 25

Back 23

3. 20

Front 24

8-24.When cesspools are located in fine sand, what can be done to increase the leaching field? 1. Add more stones to the bottom of cesspool. 2. Surround the walls with medium sand. 3. Provide a trapped outlet at the bottom of cesspool. 4. Surround the walls with graded gravel.

Back 24

4. Surround the walls with graded gravel.

Front 25

8-25.Soils that require more than 30 minutes for a fall of how many inches are unsatisfactory for leaching? 1. 1 2. 2 3. 3 4. 4

Back 25

1. 1

Front 26

8-26.The bottom of the inlet sewer should be how many inches above the water level of the tank? 1. 2 2. 3 3. 5 4. 7

Back 26

2. 3

Front 27

8-27.When a septic tank is to be installed, what is the minimum desirable size, in gallons? 1. 250 2. 500 3. 1000 4. 1500

Back 27

3. 1000

Front 28

8-28.Excessive scum in septic tanks results in which condition? 1. Odor decrease 2. Low solids content 3. Baffling 4. Odor increase

Back 28

4. Odor increase

Front 29

8-29.To ensure food and water will be protected from contamination, latrines should be placed how many yards from mess areas? 1. 100 2. 200 3. 300 4. 400

Back 29

1. 100

Front 30

8-30.Straddle trenches are built how many feet long? 1. 2 2. 4 3. 6 4. 8

Back 30

2. 4

Front 31

8-31.A unit containing 100 personnel requires how many feet of latrine space? 1. 4 2. 8 3. 16 4. 32

Back 31

3. 16

Front 32

8-32.What type of latrine is used when you have a high groundwater level? 1. Bored hole 2. Deep pit 3. Straddle 4. Mound

Back 32

4. Mound

Front 33

8-33.After cleaning the pails used with the pail latrine, what substance is added to the pail prior to placing it back in service? 1. Pine oil disinfectant 2. Lime 3. Gasoline 4. Insecticide

Back 33

1. Pine oil disinfectant

Front 34

8-34.What is the depth, in feet, of an 8-seat box type latrine in use for 2 weeks or less? 1. 2 2. 4 3. 6 4. 8

Back 34

2. 4

Front 35

8-35.Which urine disposal facilities are the best for field use? 1. Pipe urinals 2. Urinal troughs 3. Urine soakage pits 4. Recessed urine pits

Back 35

3. Urine soakage pits

Front 36

8-36.Pipes utilized with the pipe urinal system should extend how many inches above the ground surface? 1. 15 2. 26 3. 30 4. 36

Back 36

3. 30

Front 37

8-37.Which type of soil does NOT have good leaching abilities? 1. Sandy 2. Porous 3. Loam 4. Rocky

Back 37

4. Rocky

Front 38

8-38.Which condition need NOT be met to have a properly functioning tile field? 1. Subsurface drainage towards the field 2. Groundwater well below the level of the field. 3. Soil of satisfactory leaching characteristics. 4. Adequate area for tile field installation.

Back 38

1. Subsurface drainage towards the field

Front 39

8-39.When fiber pipe is used to lay pipe in a trench, what is the distance requirement, in inches, between the joint openings? 1. 1/2 2. 3/8 3. 3/4 4. 7/8

Back 39

2. 3/8

Front 40

8-40.The distance between laterals during the layout of leaching fields is how many times wider than the trench? 1. 1 2. 2 3. 3 4. 4

Back 40

3. 3

Front 41

8-41.The water cycle associated with water treatment is also known by what term? 1. Disinfection 2. Circulation 3. Treatment 4. Hydrologic

Back 41

2. Circulation

Front 42

8-42.The capacity of the material composing any stratum to transmit water under pressure is known as what? 1. Permeability 2. Crossover 3. Porosity 4. Briggsfication

Back 42

1. Permeability

Front 43

8-43.(True or False) Wells ending in the zone of aeration produce no water. 1. True 2. False 44.

Back 43

1. True

Front 44

8-44.The time between drinking contaminated water and the appearance of a disease is known as what period? 1. Aeration 2. Incubation 3. Presentation 4. Inoculation

Back 44

2. Incubation

Front 45

8-45.Impurities in water can be broken down into how many different categories of impurities? 1. 1 2. 2 3. 3 4. 4

Back 45

2. 2

Front 46

8-46.How many methods are currently in use by the Seabees in field water treatment and purification? 1. 3 2. 4 3. 5 4. 6

Back 46

3. 5

Front 47

8-47.Which is a common floc-forming chemical used in flocculation? 1. Chlorine 2. Bromine 3. Iodine 4. Aluminum sulfate

Back 47

4. Aluminum sulfate

Front 48

8-48.Each pound of liquid chlorine produces how many cubic feet of chlorine gas at atmospheric pressure and at a temperature of 68 degrees? 1. 5 2. 10 3. 15 4. 20

Back 48

1. 5

Front 49

8-49.(True or False) The bactericidal effectiveness of chlorine depends upon the pH chlorine residual, contact period, and pressure. 1. True 2. False

Back 49

1. True

Front 50

8-50.What type of solution does a low pH value indicate? 1. Very weak acid 2. Very strong alkaline 3. Very strong acid 4. Very weak alkaline

Back 50

3. Very strong acid

Front 51

8-51.Which is NOT a consideration in the safe handling of chlorine? 1. Never connect a full cylinder to a manifold with another cylinder unless temperatures are the same. 2. When not withdrawing the chlorine, keep outlet valves shut. 3. Disconnect all hoses once the cylinder is empty. 4. Ensure that the storage area contains high humidity.

Back 51

4. Ensure that the storage area contains high humidity.

Front 52

8-52.Discharge of cylinders containing chlorine should be conducted in a room with a temperature of               degrees Fahrenheit. 1. 50 2. 60 3. 70 4. 80

Back 52

3. 70

Front 53

8-53.Direct feed chlorinators cannot be used where the pressure of the water being treated is more than how many pounds per square inch? 1. 10 2. 20 3. 30 4. 40

Back 53

2. 20

Front 54

8-54.The chlorinator operates under how many inches of vacuum? 1. 1 2. 2 3. 3 4. 5

Back 54

4. 5

Front 55

8-55.The dosage rate of a hypochlorinator is controlled by what piece of equipment? 1. Meter 2. Pilot valve 3. Feeder container 4. Gearbox

Back 55

1. Meter

Front 56

8-56.When locating chlorination equipment in a room with other pieces of equipment, you should install curbing how many inches high around the chlorination equipment? 1. 2 2. 4 3. 6 4. 8

Back 56

3. 6

Front 57

8-57.To prevent accidents caused by the corrosive action of hypochlorite solutions, the solution container is lined with which type of material? 1. Chlorine resistant iron 2. Ammonia resistant steel 3. Chlorine resisted plastic 4. Ammonia resistant plastic

Back 57

3. Chlorine resisted plastic

Front 58

8-58.Cylinders containing ammonia gas will liquefy at a temperature of how many degrees Fahrenheit? 1. 130 2. 135 3. 145 4. 150

Back 58

3. 145

Front 59

8-59.Water samples from a lake should be taken how many feet out from the shore? 1. 10 2. 15 3. 20 4. 25

Back 59

4. 25

Front 60

8-60.In an orthotolidine test, how many minutes should the sample sit after adding the orthotolidine solution? 1. 5 2. 10 3. 15 4. 20

Back 60

1. 5

Front 61

8-61.In an OTA test, the temperature of the sample should never be above a temperature of how many degrees Fahrenheit? 1. 58 2. 68 3. 78 4. 88

Back 61

2. 68

Front 62

8-62.A pH reading of 7 indicates what condition? 1. Acidic 2. Corrosive 3. Neutral 4. Alkaline

Back 62

3. Neutral

Front 63

8-63.How many salinity tests can be performed to determine the salt concentration of a sample of water? 1. 1 2. 2 3. 3 4. 4

Back 63

4. 4

Front 64

8-64.Which method of determining water hardness is vastly superior to other tests? 1. Salinity 2. Methyl orange 3. Titration 4. Methyl purple

Back 64

3. Titration

Front 65

8-65.Which type of odor test is most widely used to determining odor levels? 1. Fragrance 2. Threshold 3. Briggs 4. Stark

Back 65

2. Threshold

Front 66

8-66.For how many years are water sampling test results kept? 1. 1 2. 2 3. 3 4. 4

Back 66

3. 3