Plumbing Theory

Front 1

The letters N.P.S stands for?

Back 1

Nominal Pipe Size

Front 2

What does I.P.S stand for?

Back 2

Iron Pipe Size

Front 3

The schedule number for extra strong pipe is?

Back 3

SCH 80

Front 4

The letters designated for the heaviest wall thickness is?

Back 4

XXS

Front 5

The standard of pipe that has the smallest inside square area is?

Back 5

XXH

Front 6

The actual outside diameter is used to measure steel pipe larger than?

Back 6

12”

Front 7

Steel pipe and fittings may be sold with a zinc and tin coating. When Coates the steel pipe is known as galvanized pipe. It can be applied by what methods?

Back 7

Dipping and electrolysis

Front 8

Galvanized steel pipe may be installed where?

Back 8

Above ground and inside a building

Front 9

What does the term ‘standard’ mean when referring to steel pipe?

Back 9

Schedule or thickness of the pipe

Front 10

The schedule number for standard wall pipe is?

Back 10

SCH 40

Front 11

Steel pipe is manufactured in lengths from?

Back 11

19’-0” - 22’-6”

Front 12

Three inch pipe requires how many threads per inch?

Back 12

8 threads per inch

Front 13

A left hand thread pattern will tighten by rotating the pipe

Back 13

Counterclockwise

Front 14

If a thread pattern is cut too long, the pipe will?

Back 14

Create a leak in the fitting and bottom out the fitting

Front 15

The thinnest pipe wall that should be threaded is?

Back 15

Schedule 40

Front 16

What length of pipe wrench is required to properly torque a 3/4” steel pipe?

Back 16

14” pipe wrench

Front 17

An 18 inch pipe ranch should not be used to tighten any pipe less than?

Back 17

1” (inch)

Front 18

Advantages of the standardization of manufactured pipe and fittings are?

Back 18

Threading tools can be standardized. Pipe manufactured and threaded in one country can be used with fittings from another. Valves, flanges, and pumps can be produced to a standard in many countries.

Front 19

Black steel pipe is protected from rust by?

Back 19

Coating with varnish. Coating with shellac

Front 20

All pipe joint sealants must be?

Back 20

C.S.A approved and U.L.C approved.

Front 21

All installations of glass piping in ON must be made according to?

Back 21

OBC

Front 22

when cutting small diameter glass pipe, what types of cutter wheels are being used?

Back 22

diamond cutter wheels

Front 23

when cutting larger diameter glass pipe, what method is used?

Back 23

inside diamond wheeled cutters are used to score the inside of the pipe while heating the outside of the pipe

Front 24

what types of hangers should be used for horizontal glass pipe installation?

Back 24

clevis hangers and trapeze hangers

Front 25

all acid waste discharging from glass piping systems must be?

Back 25

neautralized in special tanks

Front 26

cast iron has these characteristics

Back 26

low thermal expansion; extremely strong and durable; fire resistant; Superior noise suppression

Front 27

recommended depth of lead or PC- 4 used to secure a caulked cast iron joint?

Back 27

1"

Front 28

one method OS checking cast iron pipe and fittings for cracks is?

Back 28

genntly tapping each one with a hammer

Front 29

when constructing a caulked joint, the function of the oakum is to?

Back 29

make the joint solid, and make the joint leak proof

Front 30

the most common method used today for joining cast iron pipe and fittings together is?

Back 30

mechanical joint couplings

Front 31

disadvantages of using cast iron pipe and fittings?

Back 31

material costs are expensive; installation is expensive and time consuming; quite heavy when compared to most otherf drainage materials; special tools and equipment are often required

Front 32

the smallest cast iron pipe that may be assembled with mechanical joint coouplings is?

Back 32

1 1/4"

Front 33

the largest mechanical joint couplings that may be purchased is?

Back 33

15"

Front 34

all pipe clamps, nuts and screws used in the plumbing system must be?

Back 34

made of stainless steel

Front 35

all coupling nuts on mechanical joint couplings must be tightented to atleast?

Back 35

60IBs./ ft

Front 36

all mechanical gaskets and sleeves used in Ontario shall be approved by?

Back 36

CSA

Front 37

which method is used to cut cast iron pipe?

Back 37

hammer and chisel; ratchet snap cutters; snap cutters; chop saw

Front 38

PC-4 which is a material inserted on top of a packed oakum joint is made out of what materials?

Back 38

hydralime and sodium carbonate

Front 39

what is used to support mechanical cast iron vertical stacks?

Back 39

riser clamps

Front 40

what are characteristics of Duriron pipe?

Back 40

extremely brittle; easily cracked; pipe and fittings are manufactured with high glass content; extremely corrosive resistant

Front 41

what materials can be flushed down Duriron pipe?

Back 41

bleaches; acids; solvents; aggressive fluids

Front 42

what is used to support cast iron piping in the horizontal position?

Back 42

clevis hangers; Bibby st. Croix hangers; riser clamps; unistrut

Front 43

what methods can be used to join glass pipe?

Back 43

beveled end couplings; plain Ed couplings; flanged couplings; mechanical couplings

Front 44

what is not a property of glass piping?

Back 44

high rate of expansion

Front 45

what method is used to protect glass pipe underground?

Back 45

wrapping the material in a Bury- Pac

Front 46

the largest size of pipe that may be supported by strap hangers is?

Back 46

4"

Front 47

maximum spacing for vertical piping supports is?

Back 47

7.5m or/and every other floor

Front 48

used to prevent hangers from damaging pipe insulations?

Back 48

Insulation Shields

Front 49

what creates electrolysis?

Back 49

using steel hangers to support copper pipe

Front 50

horizontal supports or hangers for plastic water piping shall never be more than?

Back 50

1m apart

Front 51

horizontal supports for lead horizontal piping shall be?

Back 51

supported throughout it's entire length

Front 52

horizontal supports for galvanized or steel pipe 6" in diameter or more shall not be spaced more than?

Back 52

3.75m

Front 53

metal pipe which passes through foundry sand shall be coated with?

Back 53

bituminous material

Front 54

hanger selection for horizontal piping depends upon?

Back 54

the size of pipe; weight of pipe when full; position which the pipe is to be installed; type of building construction

Front 55

backfill for underground piping must be free from?

Back 55

frozen earth; stones; boulders; cinders

Front 56

what materials are strap hangers made from?

Back 56

steel and copper

Front 57

the following hanger allows for movement of pipe during expansion and contraction

Back 57

roller hangers

Front 58

minimum threaded rod size used to support pipe over 4" in diameter is?

Back 58

1/2" rod

Front 59

minimum threaded rod size used to support pipe under 4" in diameter is?

Back 59

3/8" rod

Front 60

this piece of hardware is used to lengthen threaded rod

Back 60

rod couplings

Front 61

what is used to support vertical piping?

Back 61

U bolts and riser clamps

Front 62

plastic water pipe shall be supported at intervals not exceeding?

Back 62

1m

Front 63

plastic DWV piping must be supported a minimum of every?

Back 63

1.2m

Front 64

soft copper must be supported at a maximum of?

Back 64

2.5m

Front 65

hard tempered copper piping larger than 1" diameter shall be supported in intervals not exceeding?

Back 65

3m

Front 66

Copper tube which has the thickest wall type is?

Back 66

Type K

Front 67

The colour code used for type M copper is?

Back 67

Red

Front 68

The colour code used for type DWV is?

Back 68

Yellow

Front 69

The colour code used for type DWV is?

Back 69

Yellow

Front 70

The colour code used for type L copper is?

Back 70

Blue

Front 71

The colour code used for Turk is is?

Back 71

Green and/ or black

Front 72

DWV type copper pipe may be used for the following applications?

Back 72

Drains, waste, and vent above ground

Front 73

Copper pipe and fittings generally have?

Back 73

Poor acid resistance, manufacturers colour paint markings every 2 feet, low frictional resistance to flow, and high bursting strength

Front 74

Copper pipe and fittings may be joined together by these methods?

Back 74

Soldering, flaring, compression and brazing.

Front 75

The Canadian copped institute guarantees copper to last?

Back 75

50 years

Front 76

What are the disadvantages is using copper pipe?

Back 76

Copper expands twice as much as iron or steel pipe piping, the initial cost is extremely high, copper takes on the same temperature as the liquid inside, and copper must not come in contact with other dissimilar metals.

Front 77

The composition of 50/50 lead?

Back 77

50% lead/ 50% tin

Front 78

The composition for 95/5 solder is?

Back 78

95% tin/ 5% antimony

Front 79

A rose-bud oxyacetylene torch tip is commonly used for which type of applications?

Back 79

Silver- alloy brazing, for joining 6 inch to 12 inch diameter pipes, hard soldering, and higher temperature soldering of above 1000 F

Front 80

What are the advantages of using copper pipe?

Back 80

High bursting strength, not easily breakable, easily supported, and low frictional resistance to flow.

Front 81

Copper water service pipe installed underground outside the building must have a minimum of?

Back 81

3/4”

Front 82

Solder is drawn into the joint of a copper pipe and fittings by?

Back 82

Capillary action