Algonquin Basic Plumbing Theory - Week 2

Front 1

Care should be exercised when entering a manhole for what reason?

Back 1

Insufficient Oxygen to maintain breathing

Front 2

It is good practice to aerate the sewer how?

Back 2

Opening two adjoining manholes

Front 3

The number and location of manholes required for a particular site generally depend on the following five factors:

Back 3

1) Contour of the land

2) Length and diameter of the bldg sewer

3) Changes in the direction of the bldg sewer

4) Number of junctions required

5) Invert elevation of the sewer

Front 4

Circular manholes shall have a minimum diameter of:

Back 4

1.2m (3ft 11")

Front 5

Why must a support be separated or insulated from copper tube?

Back 5

To prevent galvanic action.

Front 6

Vertical piping shall be anchored and supported at a distance no further than:

Back 6

7.5m or alternate storeys

Front 7

On a non load-bearing wall stud how much of the stud must be left after drilling?

Back 7

40mm (1 5/8")

Front 8

What is the maximum hole size that can be drilled in a floor joist?

Back 8

1/4 the depth of the joist

Front 9

On a load bearing wall stud what is the max hole diameter that may be drilled?

Back 9

1/3 the depth of the stud

Front 10

Can roof trusses be drilled or notched?

Back 10

No

Front 11

No part of hole may be closer than how far to the edge of a floor joist?

Back 11

2"

Front 12

What is the minimum thickness of backfill for underground piping?

Back 12

300mm

Front 13

When passing pipe through a wall, may the wall be used to support the pipe?

Back 13

No

Front 14

When using solid or perforated strap hangers, what is the longest length that may be used according to code?

Back 14

4"

Front 15

For supporting 2" or less width pipe, what is the minimum size strapping that may be used?

Back 15

.6mm thick, 12mm wide

Front 16

For supporting 4" or less width pipe, what is the minimum size strapping that may be used?

Back 16

.8mm thick, 18mm wide

Front 17

What are used to hold vertical piping in place when it passes through different floor levels?

Back 17

Riser clamps

Front 18

What is the smallest size of threaded rod that may be used for supporting pipe over 4" in diameter?

Back 18

1/2"

Front 19

What is the smallest size of threaded rod that may be used for supporting pipe over 2" in diameter?

Back 19

1/4"

Front 20

What are used for securing pipe lines to I beams and channel iron where thickness does not exceed 3/4" inch?

Back 20

C-Clamps

Front 21

The largest size of pipe that may be supported by strap hangers is:

Back 21

4"

Front 22

The maximum spacing between supports for a 1 inch cold water line should be:

Back 22

2.5m

Front 23

Where cast iron is installed as a building drain and is located above ground, it must be supported at every hub or how many meters?

Back 23

3 meters

Front 24

Piping must be insulated to prevent what from occuring?

Back 24

Heat loss or gain, condensation

Front 25

When must ABS pipe be supported?

Back 25

1) Intervals not exceeding 1.2m

2) At every change of direction

3) At the end of a branch

Front 26

Copper pipe or fittings less than 1" must be supported at intervals not exeeding:

Back 26

2.5m

Front 27

Copper pipe or fittings larger than one inch must be supported at intervals not exceeding:

Back 27

3m

Front 28

Plastic water pipe must be supported at intervals not exceeding:

Back 28

1m (3' 3")

Front 29

Galvanized steel pipe 6" or longer must be supported at intervals not exceeding:

Back 29

3.75m

Front 30

Galvanized steel pipe less than 6" must be supported at intervals not exceeding:

Back 30

2.5m

Front 31

The maximum difference between supports for cast iron piping systems is:

Back 31

3m

Front 32

Concrete inserts allow for the use of:

Back 32

Threaded Rod

Front 33

The most common size of threaded rod is:

Back 33

3/8"

Front 34

What are used to prevent the hanger from crushing the pipe insulation?

Back 34

Insulation shields

Front 35

With respect to drains, Part 7 of The Ontario Building Code has these 4 basic objectives:

Back 35

1) Protection of Public Health

2) Standards for material

3) Standardization of installations

4) Inspection by law and testing

Front 36

The OBC regulations are enforced by:

Back 36

1) Plumbing Inspectors

2) Public Health Inspectors

3) Other Authorized Inspectors

Front 37

What is a back vent?

Back 37

A pipe installed to vent a trap off the horizontal section of a fixture drain or the vertical leg of a water closet

Front 38

What is a backwater valve?

Back 38

A check valve designed for use in a gravity drainage system

Front 39

What is 1 fixture unit equal to?

Back 39

1 cu. ft of water to be discharged in a 1 1/4" pipe in a 60 second period

Front 40

A cleanout is a fitting access in a drainage or venting system that is installed to provide access for cleaning and inspection and that is provided with a replaceable:

Back 40

Air tight cover

Front 41

A pipe that is an extension of a vertical section of a branch or trap arm:

Back 41

Continuous vent

Front 42

A vent pipe that is a vertical extension of a vertical waste pipe and includes the vertical waste pipe:

Back 42

Continuous waste and vent

Front 43

A pipe that connects the waste opening of a fixture to the trap serving the fixture:

Back 43

Fixture outlet pipe

Front 44

What shall be installed as close as is practical to the foot of each soil stack, waste stack, and rainwater leader?

Back 44

A cleanout

Front 45

Where a building trap is installed in a building drain, the trap shall be provided with a cleanout where?

Back 45

On the inlet side

Front 46

Cleanouts installed in horizontal piping of a trade size of 4 inches or less shall be located at intervals not exceeding:

Back 46

15m

Front 47

Cleanouts installed in horizontal piping of a trade size larger than 4 inches shall be located at intervals not exceeding:

Back 47

30m

Front 48

No running trap shall be installed unless provided with:

Back 48

An accessible hand hole for cleaning purposes

Front 49

With regard to sinks, a cleanout shall be installed:

Back 49

Immediately downstream from the fixture trap

Front 50

Every fixture trap serving a lavatory, sink or laundry tray must have a removable screw plug at it's lowest point for cleaning the trap. The diameter of this plug must be at least:

Back 50

3/4"

Front 51

The following 4 scenarios do not require a minimum 3/4" screw plug for cleaning the trap:

Back 51

1) Fixtures such as bed pans, pedestal urinals, and water closets which have trap dips that are accessible for cleaning

2) A trap of which the bottom part is removable

3) A bathtub trap, shower trap, or bidet trap

4) A floor drain

Front 52

Fixtures where contamination from bodily fluids is likely shall have cleanouts:

Back 52

150mm above the flood level rim of the fixture

Front 53

What is the purpose of a cleanout:

Back 53

1) Allow the insertion of cleaning apparatus into drainage piping

2) Insert cameras for investigation of pipe grade

3) Allow future access to the system

Front 54

The 4 sanitary units are:

Back 54

1) Water closets

2) Urinals

3) Bidets

4) Bed pan washers

Front 55

That part of drainage piping that is entirely outside the building is a:

Back 55

Building Sewer

Front 56

Where the sanitary building drain enters a building at an elevation below the building wall, the drain shall extend 4 inches minimum to the __________ __________ of the building.

Back 56

Main stack

Front 57

A point 1m from the outer face of the foundation wall indicates the junction of the:

Back 57

Building drain and building sewer

Front 58

The part of the drainage system that may be less than 4 inches is the:

Back 58

Horizontal branch

Front 59

Where the sanitary building drain enters the building through a wall, the building drain may extend full size to:

Back 59

The first change from horizontal to vertical

Front 60

The location of the private drain connection is at the:

Back 60

Property Line

Front 61

The minimum size of a building drain is:

Back 61

4"

Front 62

The sanitary system is a combination of the:

Back 62

Drain, waste, and vent system

Front 63

The correct term for a vertical drainage pipe receiving discharge from one shower, one wash basin and one bidet is:

Back 63

A soil stack

Front 64

A waste stack receives discharge from plumbing fixtures which:

Back 64

Are not sanitary units

Front 65

A waste pipe receives discharge from:

Back 65

One fixture only

Front 66

A horizontal branch receives discharge from:

Back 66

More than one plumbing fixture

Front 67

To be defined as a stack, the vertical drainage system must pass through:

Back 67

At least one floor level

Front 68

The sanitary building drain starts:

Back 68

One meter outside the foundation wall

Front 69

A fixture outlet pipe connects the fixture to:

Back 69

A trap

Front 70

Name the sub-soil drain whose purpose is to remove ground water from the foundation walls of a building?

Back 70

Foundation Drain

Front 71

What is the minimum size pipe for a foundation drain?

Back 71

4"

Front 72

What is the velocity flow of a foundation drain?

Back 72

1/16" / foot at .5% grade

Front 73

A drain tends to clog because the flow is too shallow to 'float' the solids to the public sewer is a symptom of:

Back 73

Oversized Pipe

Front 74

Sluggish flow due to a full pipe leading to the piling up of solids and blocking the drain is a symptom of:

Back 74

Undersized Pipe

Front 75

Water moving at a high velocity leaving solids behind and leading to buildup is a symptom of:

Back 75

Too much grade

Front 76

Sluggish flow allowing solids to pile up along the entire pipe run is a symptom of:

Back 76

Not enough grade

Front 77

Where are gutter drains and downspouts connected to the storm building drain?

Back 77

Above the finish grade

Front 78

Where are area drains used?

Back 78

For parking lots and areas that are exposed to atmospheric conditions

Front 79

Area drains must be protected against what type of conditions?

Back 79

Freezing conditions

Front 80

Area drains must be installed so that what is accessible for cleaning?

Back 80

Storm pipe

Front 81

What is required on a sub-soil drain branch?

Back 81

Backwater protection

Front 82

Flat roofs must have what?

Back 82

Roof drains

Front 83

Roof drains empty into what?

Back 83

Rain water leaders

Front 84

Rain water leaders must be protected against:

Back 84

Expansion and contraction

Front 85

Rain water leaders must be able to withstand a pressure equal to:

Back 85

Head pressure plus a 5 ft. head

Front 86

Area drains, sub-soil drains, and roof drains tie together into the:

Back 86

Storm building drain

Front 87

Corrosion is a problem in the suspension of copper tubing because of what between steel and copper?

Back 87

Electro-galvanization

Front 88

Faulty joints and connections are usually the result of:

Back 88

a) uneven cutting of the pipe

b) unreamed pipe

c) not bottoming the pipe fitting

d) poor alignment

e) allowing oakum, solder, cement, or other jointing material to protrude into the pipe

f) improper thread engagement

Front 89

What is a cleanout?

Back 89

A cleanout is a device having an airtight, removable and replaceable cover or plug and is designed to be installed in a pipeline or in a fitting.

Front 90

Why install a cleanout?

Back 90

i) Allow the insertion of cleaning apparatus

ii) Insert cameras for investigation of pipe grade

iii) Allow future access into the system

Front 91

In-line cleanouts are designed for installation in a pipeline rather than in a:

Back 91

Fitting

Front 92

A cleanout shall be installed so as to be readily:

Back 92

Accessible

Front 93

Cleanouts installed in or behind a wall should be provided with an:

Back 93

Access Door

Front 94

A fitting cleanout is designed primarily for cleaning where from the cleanout?

Back 94

Downstream

Front 95

The cleanout that has a rectangular cover bolted to a bell and spigot fitting is the:

Back 95

Barrett Cleanout

Front 96

A cleanout shall be installed as close as practical to what part of a soil stack, waste stack, or rain water leader?

Back 96

The base

Front 97

The nuts used to secure clean out covers shall be of what kind of material?

Back 97

Non-Corroding

Front 98

A 4" drain 17 meters in length would require at least how many cleanouts?

Back 98

2

Front 99

A 6" building sewer 100 meters in length would require how many 1.2m manholes?

Back 99

1

Front 100

An 8" building sewer 75m in length would require how many 1.2m cleanouts?

Back 100

1

Front 101

A 36" building storm sewer 475m in length would require how many 1.2m manholes?

Back 101

3

Front 102

Every storm and sanitary building drain shall be provided with a cleanout located where?

Back 102

As close as possible to where the building drain enters the building

Front 103

When manholes are required in a building sewer with a trade of 18", the distance between manholes should not exceed how many meters?

Back 103

90m

Front 104

Lavatories, laundry tubs, and kitchen sinks must have either (3):

Back 104

1) Bottom outlet plug

2) cleanout

3) union p-trap that can be taken apart

Front 105

The trap of a laundry tub would require a cleanout with a minimum diameter of:

Back 105

3/4"

Front 106

Where manholes are required in a building storm sewer with a trade size of 30", the distance between manholes shall not exceed:

Back 106

150m

Front 107

Manholes must be installed in a building sewers where? (4)

Back 107

1) Junctions

2) Changes in grade

3) Changes in size

4) Changes in alignment

Front 108

The spacing between cleanouts on a 4" building drain is how many meters?

Back 108

15m

Front 109

The spacing between cleanouts on a 5" drain is how many meters?

Back 109

30m

Front 110

The term 'vertical' refers to piping departing from true vertical by no more than:

Back 110

45 degrees

Front 111

A double Y may not be installed in a piping which is:

Back 111

horizontal

Front 112

Vent piping must connect above the flood level rim of the highest fixture to prevent the vent piping from:

Back 112

Acting as a drain pipe

Front 113

A 90 degree short sweep elbow should not be used to change direction from:

Back 113

Horizontal to vertical

Front 114

A doubt TY may be used if the barrel of the fitting is a minimum of 3" and the branches are: (3)

Back 114

1 1/4", 1 1/2", or 2"

Front 115

Are there vertical restrictions placed on a double Y?

Back 115

No

Front 116

There are no restrictions placed on TY's when installed in what kind of piping?

Back 116

Vent

Front 117

List 4 prohibited fittings:

Back 117

- pressure fitting in DWV

- sanitary TY installed horizontally

- double Y installed horizontally

- tapping in a pipe

Front 118

A drain plan should show the type and design of the piping:

Back 118

Under the basement floor

Front 119

A building drain plan is used for many different purposes. Name 4:

Back 119

1) Location of soil stack, cleanout, and floor drains

2) Material take-off and labour

3) Future reference

4) Sizing purpose

Front 120

Building drain plans must conform to the Ontario Building Code and all:

Back 120

Municipal Bylaws

Front 121

Storm drainage piping is shown in what colour:

Back 121

Blue

Front 122

Sanitary drainage is shown in what colour:

Back 122

Red

Front 123

Venting is shown in what colour:

Back 123

Green

Front 124

A drain plan may be used to identify all required soil stacks of what type:

Back 124

Waste and Soil

Front 125

PDC

Back 125

Private Drain Connection

Front 126

SL

Back 126

Street Line

Front 127

TT

Back 127

Test Tee

Front 128

SS

Back 128

Soil Stack

Front 129

WS

Back 129

Waste Stack

Front 130

RWL

Back 130

Rain Water Leader

Front 131

DS

Back 131

Downspout

Front 132

FDC

Back 132

Foundation Drain Connection

Front 133

FD

Back 133

Floor Drain / Foundation Drain

Front 134

WP

Back 134

Waste Pipe

Front 135

BWV

Back 135

Backwater Valve

Front 136

BD

Back 136

Building Drain

Front 137

BS

Back 137

Building Sewers

Front 138

TSP

Back 138

Trap Seal Primer

Front 139

LT

Back 139

Laundry Tub

Front 140

WC

Back 140

Water Closet

Front 141

ks

Back 141

Kitchen Sink

Front 142

PL

Back 142

Property Line

Front 143

FAI

Back 143

Fresh Air inlet

Front 144

CO

Back 144

Cleanout

Front 145

What is shown with three broken blue lines on drainage plans?

Back 145

Trap Seal Primers

Front 146

When trenching for foundation drains, the trench must be how deep?

Back 146

As deep as the distance away from the footing or foundation of the building

Front 147

A horizontal drainage system for a building is usually shown in the form of a:

Back 147

Drainage Plan

Front 148

Where possible, drains should be located in the same trench in order to reduce the:

Back 148

Cost of excavation

Front 149

The minimum size of any building drain is always:

Back 149

4"

Front 150

The first fitting or connection on the incoming building drain is always what:

Back 150

A Y and a 45 degree elbow to allow for the main cleanout

Front 151

An open circle on a drainage plan represents a 90 degree elbow looking:

Back 151

Up

Front 152

The minimum diameter of a storm building drain is:

Back 152

4"

Front 153

Th appurtenance installed to protect against backflow on the storm system is called:

Back 153

Backwater valve

Front 154

A backwater valve is required to be accessible, can it be used as a cleanout access?

Back 154

Only if the access is downstream of the gate

Front 155

Why should a downspout not be tied into the foundation drain?

Back 155

Soil draining into the foundation drain would eventually cause it to clog up

Front 156

If soil and grit are washed into a foundation drain, what will be noticeable around the surface of the finished grade along the foundation wall?

Back 156

A depression

Front 157

Connections of foundation drains, sub-soil drains, downspouts, rain water leaders, and area drains must be connected to the storm building drain and protected against:

Back 157

Backflow

Front 158

The minimum size of an area drain, a window well pipe outlet, and a sub-soil drainage branch is:

Back 158

4"

Front 159

The code states that in a storm system installation the testing pressure should be:

Back 159

10ft/head or 3m above the upper most joint in the system for 15 minutes

Front 160

The minimum size of vent used in a manhole within a building shall be no less than:

Back 160

2"

Front 161

Building sewers of 8" through 24" in size and 30m or more in length shall be provided with access through manholes spaced no more than:

Back 161

90m apart; no manhole shall be more than 30m downstream from a building drain

Front 162

Sewer piping of a size larger than 24" shall have manholes spaced at intervals of not more than:

Back 162

150m and no manhole shall be more than 30m downstream of a building drain