page 39-54

Question 1

All horizontal or brach vents shall be free _____ and shall be ________–

Answer 1

from drops or sags
graded and connected to drip back by gravity to the drainage pipe it serves

Question 2

Each vent shall rise vertically ___

Answer 2

152 mm above the highest level rim of the fixtures served before offsetting horizontally

Question 3

All vent pipes shall extend undiminished in size above the roof or shall be reconnected to the soil or waste stack vent at a point below the roof.

Answer 3

True

Question 4

The __ shall be increased one pipe size above the connection between the stack vent and the horizontal vent

Answer 4

Vent Stack Through Roof (VSTR)

Question 5

__ fixtures having same level inlet openings, may be served by a common vertical pipe connected to an approved double branch fitting

Answer 5

Two (2)

Question 6

Vent Termination

VSTR shall terminate vertically ____ from any vertical surface nearby.

Answer 6

not less than 150 mm above the roof nor less than 300 mm

Question 7

Each vent opening shall terminate

_____ from any openable window
_____ above any openable window
_____ away from any lot line, alley and street boundary lines

Answer 7

Not less than 3 m
Not less than 0.90 m
Not less than 0.90 m

Question 8

Vertical vent pipes shall extend __ distant from any part of the roof that is used for human activities and shall extend not less than __ above such roof

Answer 8

3 m
2.10 m

Question 9

VENT STACK & RELIEF VENTS

Each soil or waste stack extending 10 or more storeys above the building drain shall be served by ______ which shall extend undiminished in size from its upper terminal at the roof and connect to the soil or waste stack at fround level and at every fifth floor levels with a _______ at a point below the horizontal soil or waste branch connection to the stack and at the nearby vent stack above the same floor to provide a relief vent.

Answer 9

a parallel vent stack
yoke vent

Question 10

The size of yoke vent shall ___ in diameter than either the soil stack or the vent stack, whichever is smaller

Answer 10

not be less

Question 11

The yoke vent connection at the vent stack shall be placed ___ above the floor level and, by mean of a wye branch at the soil stack, shall be placed below the fixture branch serving that floor.

Answer 11

1.0 m

Question 12

Sanitary System Problems

Direct effect of the Minus and Plus pressure inside the system die to inadequate ventilation of traps

Answer 12

Trap seal loss

Question 13

direct and momentum

Answer 13

Siphonage

Question 14

Caused by extreme temperatures, idleness

Answer 14

Evaporation

Question 15

Strong winds blow the trap seal

Answer 15

Wind effects

Question 16

Back pressure

Question 17

Capillary Action

Question 18

Due to the effect of atmosphetic pressure and/or gravity

Answer 18

Retardation of flow

Question 19

Due to the formation of acids

Answer 19

Deterioration of the Materials

Question 20

is a pipe that does not connect directly with the drainage system but conveys liquid wastes by discharging into a plumbing pfixture, interceptor or receptacle directly connected to the drainage system

Answer 20

Indirect Waste Pipe

Question 21

A grease trap is not required for undividual dwelling units

Answer 21

True

Question 22

No grease trap shall be installed for a facility that has an approved rate of flow of more than ___ liters per second nor less than ___

Answer 22

3.4 liters
1.3 l/s

Question 23

each grease trap shall have an approved water seal of not less than __ in depth or the diameter of its outlet, whichever is greater

Answer 23

51 mm

Question 24

No food waste disposal unit shall discharge into a grease interceptor or grease trap

Answer 24

True

Question 25

Used for fixtures where grease may be introduced into the drainage or sewer system in quantities that can effect line stoppage or hinder sewage treatment or private sewage disposal

Answer 25

Grease Traps

Question 26

Two Main Types of Grease Traps

Answer 26

Earth Cooled Grease Trap Mechanical Grease Trap

Question 27

House Drain Appliances grease suspended in waste floats to the surface

Answer 27

Operating Principles

Question 28

Earth cooled grease trap

Question 29

Mechanical Grease trap

Question 30

Grease Trap Capacity 1 - 76 2 - 95 3 - 132 4 - 189

Answer 30

18 23 32 45

Question 31

Placed in the house drain immediately inside the foundation wall of the building

Answer 31

House Traps

Question 32

Used to prevent groundwater from seeping through the basement walls and foundation Hollow tiles are placed aroung the perimeter of the foundation where water is collected; drain tiles are connected to the house drain or sump pit

Answer 32

Drain Tiles

Question 33

Aka garage catch basin Trap is filled with water and located at the lowest point of the garage so it can collect all wastes

Answer 33

Garage Traps

Question 34

Used in house drain to prevent the unlikely occurrence of back flows Similar to check valves

Answer 34

Back Flow Valves

Question 35

Pumps the wastes up from the sump it to the sewers (which are usually higher than basement levels)

Answer 35

Sewage Ejectors

Question 36

The final stage of the plumbing process; where used water and water-carried wastes are brought to various dsposal outlets

Answer 36

Disposal Phase

Question 37

A _______ desgined and constructed to reveice the discharge of sewage from a building sewer, separate solids from the liquid, digest organic matter and store disgested liquids to discharge for final disposal

Answer 37

Watertight covered receptacle

Question 38

solid organic matter that are denser than water and settle at the bottom of the septic tank

Answer 38

Sludge

Question 39

lighter organic material that rise to the surface of the water

Answer 39

Scum

Question 40

liquid content of sewage

Answer 40

Effluent

Question 41

relied on oxygen to survive

Answer 41

Aerobic bacteria

Question 42

can survive in places without oxygen

Answer 42

Anaerobic bacteria