topic 3: pipes and fittings

Question 1

_____ is the most popular and generally specified material for drainage installation.

Answer 1

cast iron pipe (CIP)

Question 2

Cast Iron Pipe commercial length: ____

Answer 2

600cm

Question 3

Cast Iron Pipe diameters: _____

Answer 3

50 - 150mm

Question 4

_____ is affected to some extent by corrosion by acid formed by carbon dioxide, sulfur oxide, and methane gases that create rust.

Answer 4

CIP

Question 5

_____ are durable and conveniently installed (<25 storey)

Answer 5

CIP

Question 6

What are the 2 types of CIP?

Answer 6

SV type, XH type

Question 7

_____ is generally used for building installations.

Answer 7

SV type

Question 8

____ is extra duty for underground installations.

Answer 8

XH type

Question 9

CIP is connected through ____ and ____.

Answer 9

hub and spigot

Question 10

____ is made of an alloy of cast iron and silicon.

Answer 10

acid resistant cast iron pipe

Question 11

____ is installed in chemical laboratories, industries and other installations where acid wastes are being discharged.

Answer 11

acid resistant cast iron pipe

Question 12

The problem with _____ is that it is brittle and cracks easily.

Answer 12

acid resistant cast iron pipe

Question 13

Acid resistant cast iron pipes brittle and cracks easily, thus horizontal runs have to be supported at every _____ interval to prevent sagging.

Answer 13

1.5m

Question 14

____ is made of absestos fibers and portland cement.

Answer 14

asbestos pipe

Question 15

____ is used as soil, wast, ventilation and pipe downspouts.

Answer 15

asbestos pipe

Question 16

____ is suited for concrete embedment because of similar properties.

Answer 16

asbestos pipe

Question 17

_____ is one of the oldest materials used for sewer lines. It is highly resistant to most acids.

Answer 17

vitrified clay pipe

Question 18

_____ because it is made of clay, it is brittle and cracks easily when lain on unstable ground.

Answer 18

vitrified clay pipe

Question 19

vitrified clay pipe is made in short length of _____.

Answer 19

750mm

Question 20

_____ is the cheapest of all types of pipes.

Answer 20

bituminous fiber sewer pipe

Question 21

_____ is light in weight, sloightly flexible and can take slight soil movement without danger of cracking or pulling out of its joint. It is thus suited for house sewer and septic taks installations.

Answer 21

bituminous fiber sewer pipe

Question 22

____ may be softened/damaged by excessive hot water on chemical flow.

Answer 22

bituminous fiber sewer pipe

Question 23

_____ is made out of mild steel and expected to last 15 to 25 years.

Answer 23

galvanized steel pipe

Question 24

____ is subject to deposits of salt and lime.

Answer 24

galvanized steel pipe

Question 25

____ comes in several commercial sizes: 10 (3/8"), 13 (1/2"), 20 (3/4"), 25 (1"), 32 (1-1/2"), 38 (1-1/2"), 50 (2"), 75 (3"), 100 (4").

Answer 25

galvanized steel pipe

Question 26

_____ is the most expensive material for piping.

Answer 26

brass pipe

Question 27

____ is amde of an alloy of zince (15%) and copper (85%).

Answer 27

brass pipe

Question 28

____ is resistant to acids and has a smooth interior surface.

Answer 28

brass pipe

Question 29

_____ is better than steel pipe for plumbing installation.

Answer 29

galvanized wrought iron pipe

Question 30

____ is more resistnat to acid wastes.

Answer 30

galvanized wrought iron pipe

Question 31

____ the oldest pipe used for plumbing systems. Is highly resistant to acid.

Answer 31

lead pipe

Question 32

____ is poisonous and injurious, is therefore not recommended to convey water for human consumption.

Answer 32

lead pipe

Question 33

_____ is durable and extremely corrosive resistant. It is easy to install; smooth interior surface.

Answer 33

copper pipe

Question 34

What are the 3 classifications of copper pipe?

Answer 34

K type, L type, M type

Question 35

____ is the heaviest and is recommended for underground installations.

Answer 35

K type (green stripe)

Question 36

____ is lighter; available in both rigid and flexible form. Recommended for water supply line and radiant heating installations.

Answer 36

L type (blue stripe)

Question 37

____ is the thinnest; available only in rigid form. For small water supply lines and radiant heating installations.

Answer 37

M type (red stripe)

Question 38

Plastic/synthetic pipe was developed in ______.

Answer 38

Germany in 1935

Question 39

_____ are the superior type of pipe because it weighs less, is easy to cut, is flexible, has asmooth interior surface and is cheaper than steel.

Answer 39

plastic/synthetic pipes

Question 40

What are the 2 types of plastic/synthetic pipes?

Answer 40

rigid type (pipes), flexible type (tubing)

Question 41

Give 6 examples of rigid type (pipes) plastic/synthetic pipe.

Answer 41

1. PVC (Polyvinyl Chloride) 2. cPVC (Chlorinated Polyvinyl Chloride) 3. uPVC (unplasticized Polyvinyl Chloride) 4. ABS (Acrylonitrile Butadiene Styrene) 5. PP (Polypropylene) 6. SR (Styrene Rubber Plastic)

Question 42

Give 2 examples for flexible (tubing) plastic/synthetic pipe.

Answer 42

1. PE (Polyethylene) - coil 30m 2. PB (Polybutylene) - coil 30-150m

Question 43

What are 4 consideration in choosing materials?

Answer 43

1. quality and durability 2. resistance to external and internal contact with foreign matters 3. resistance to acid wast and other chemical elements that will pass into it 4. cost of materials and labor

Question 44

CI

Answer 44

cast iron

Question 45

CL

Answer 45

centerline

Question 46

CO

Answer 46

cleanout

Question 47

CW

Answer 47

cold water

Question 48

COP

Answer 48

copper

Question 49

DW

Answer 49

dishwasher

Question 50

FD

Answer 50

floor drain

Question 51

GAL.I

Answer 51

galvanized iron

Question 52

HB

Answer 52

hose bibb

Question 53

HW

Answer 53

hot water

Question 54

LT

Answer 54

laundry tray

Question 55

LAV

Answer 55

lavatory

Question 56

MC

Answer 56

medicine cabinet

Question 57

PLAS

Answer 57

plastic

Question 58

PLBG

Answer 58

plumbing

Question 59

WC

Answer 59

water closet

Question 60

WH

Answer 60

water heater

Question 61

WS

Answer 61

water softener

Question 62

______ perform pressure test on joint and connections of pipes and fittings to ensure gastihgt and watertight connections.

Answer 62

tightness

Question 63

What are the 6 types of joints?

Answer 63

1. threaded joints 2. spigot and socket joint 3. soldered joint 4. welded joint 5. flanged joint 6. grooved joint

Question 64

_____ means pipes are connected by screwing with the help of thread provided for each pipe.

Answer 64

threaded joint

Question 65

What are the 4 pipes that are available with threads?

Answer 65

1. CIP 2. copper pipes 3. PVC 4. G.I pipes

Question 66

Threads are available from ____ diameter to ____ diameter pipes.

Answer 66

6mm; 30mm

Question 67

Why are threaded joint prefereably for low temperature?

Answer 67

the joints may expand and leaked due to the thermal expansion

Question 68

Tape is acceptable to use on ____.

Answer 68

threads

Question 69

The ____ end typically has the same outer diameter as the pipe and is usually fitted into another joint called a bell or socket.

Answer 69

spigot

Question 70

This type of joint is mostly used for ____.

Answer 70

CIP

Question 71

_____ are material-closed joints (bonds) of two solderable metals.

Answer 71

soldered joint

Question 72

What are the different forms of soldered joints?

Answer 72

wire-to-wire joints; cross or hook joints

Question 73

wire-to-wire joints are ____.

Answer 73

parallel

Question 74

cross or hook hoints as well as soldered joints with _____.

Answer 74

twisted wires

Question 75

_____ are mechanically connected by the solder only and, therefore, can be more easily detached.

Answer 75

parallel and cross joints

Question 76

______, also call butt welds, are weldments that are commonly used when joining similar piper together.

Answer 76

groove welded joints

Question 77

____ can also be used to join pipes to valves, fittings, and flanges for a secure attachment.

Answer 77

welded joint (butt welded, socket welded)

Question 78

A ____ is a method of connecting pipes, valves, pumps and other equipment to form a piping system.

Answer 78

flange

Question 79

____ also provides easy access for cleaning, inspection, or modification.

Answer 79

flanged joint

Question 80

____ are usually welded or screwed.

Answer 80

flanges

Question 81

____ are made by bolting together two flanges with a gasket between them to provide a seal.

Answer 81

flanged joints

Question 82

When two pipes are joined together by maiing grooves (narrow cuts or depressions) at the end of pipes with the help of sockets or couplings, such joint are called _____.

Answer 82

grooved joints

Question 83

______ are mostly used for fire protection because it can be easily uninstalled and reinstalled frequently for maintenance.

Answer 83

grooved joint

Question 84

What are the special joints?

Answer 84

1. expansion joints 2. slip or union joints

Question 85

What are the two tests for pipes for inspection and tests?

Answer 85

water testing, air pressure testing

Question 86

___ is conducted by closing all outlets and filling the system with water from the main to locate leaks and other potential problems.

Answer 86

water testing

Question 87

_____ is used in detectinng leaks by filling the piping system with compressed are (use of soap suds in locating escaping air).

Answer 87

air pressure testing