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ut2 > topic 3: pipes and fittings > Flashcards

topic 3: pipes and fittings Flashcards

1
Q

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

A

cast iron pipe (CIP)

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2
Q

Cast Iron Pipe commercial length: ____

A

600cm

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3
Q

Cast Iron Pipe diameters: _____

A

50 - 150mm

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4
Q

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

A

CIP

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5
Q

_____ are durable and conveniently installed (<25 storey)

A

CIP

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6
Q

What are the 2 types of CIP?

A

SV type, XH type

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7
Q

_____ is generally used for building installations.

A

SV type

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8
Q

____ is extra duty for underground installations.

A

XH type

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9
Q

CIP is connected through ____ and ____.

A

hub and spigot

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10
Q

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

A

acid resistant cast iron pipe

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11
Q

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

A

acid resistant cast iron pipe

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12
Q

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

A

acid resistant cast iron pipe

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13
Q

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

A

1.5m

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14
Q

____ is made of absestos fibers and portland cement.

A

asbestos pipe

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15
Q

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

A

asbestos pipe

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16
Q

____ is suited for concrete embedment because of similar properties.

A

asbestos pipe

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17
Q

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

A

vitrified clay pipe

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18
Q

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

A

vitrified clay pipe

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19
Q

vitrified clay pipe is made in short length of _____.

A

750mm

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20
Q

_____ is the cheapest of all types of pipes.

A

bituminous fiber sewer pipe

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21
Q

_____ 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.

A

bituminous fiber sewer pipe

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22
Q

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

A

bituminous fiber sewer pipe

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23
Q

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

A

galvanized steel pipe

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24
Q

____ is subject to deposits of salt and lime.

A

galvanized steel pipe

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25
Q

____ 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”).

A

galvanized steel pipe

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26
Q

_____ is the most expensive material for piping.

A

brass pipe

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27
Q

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

A

brass pipe

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28
Q

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

A

brass pipe

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29
Q

_____ is better than steel pipe for plumbing installation.

A

galvanized wrought iron pipe

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30
Q

____ is more resistnat to acid wastes.

A

galvanized wrought iron pipe

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31
Q

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

A

lead pipe

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32
Q

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

A

lead pipe

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33
Q

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

A

copper pipe

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34
Q

What are the 3 classifications of copper pipe?

A

K type, L type, M type

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35
Q

____ is the heaviest and is recommended for underground installations.

A

K type (green stripe)

36
Q

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

A

L type (blue stripe)

37
Q

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

A

M type (red stripe)

38
Q

Plastic/synthetic pipe was developed in ______.

A

Germany in 1935

39
Q

_____ 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.

A

plastic/synthetic pipes

40
Q

What are the 2 types of plastic/synthetic pipes?

A

rigid type (pipes), flexible type (tubing)

41
Q

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

A
  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)
42
Q

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

A
  1. PE (Polyethylene) - coil 30m
  2. PB (Polybutylene) - coil 30-150m
43
Q

What are 4 consideration in choosing materials?

A
  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
44
Q

CI

A

cast iron

45
Q

CL

A

centerline

46
Q

CO

A

cleanout

47
Q

CW

A

cold water

48
Q

COP

A

copper

49
Q

DW

A

dishwasher

50
Q

FD

A

floor drain

51
Q

GAL.I

A

galvanized iron

52
Q

HB

A

hose bibb

53
Q

HW

A

hot water

54
Q

LT

A

laundry tray

55
Q

LAV

A

lavatory

56
Q

MC

A

medicine cabinet

57
Q

PLAS

A

plastic

58
Q

PLBG

A

plumbing

59
Q

WC

A

water closet

60
Q

WH

A

water heater

61
Q

WS

A

water softener

62
Q

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

A

tightness

63
Q

What are the 6 types of joints?

A
  1. threaded joints
  2. spigot and socket joint
  3. soldered joint
  4. welded joint
  5. flanged joint
  6. grooved joint
64
Q

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

A

threaded joint

65
Q

What are the 4 pipes that are available with threads?

A
  1. CIP
  2. copper pipes
  3. PVC
  4. G.I pipes
66
Q

Threads are available from ____ diameter to ____ diameter pipes.

A

6mm; 30mm

67
Q

Why are threaded joint prefereably for low temperature?

A

the joints may expand and leaked due to the thermal expansion

68
Q

Tape is acceptable to use on ____.

A

threads

69
Q

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

A

spigot

70
Q

This type of joint is mostly used for ____.

A

CIP

71
Q

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

A

soldered joint

72
Q

What are the different forms of soldered joints?

A

wire-to-wire joints; cross or hook joints

73
Q

wire-to-wire joints are ____.

A

parallel

74
Q

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

A

twisted wires

75
Q

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

A

parallel and cross joints

76
Q

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

A

groove welded joints

77
Q

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

A

welded joint (butt welded, socket welded)

78
Q

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

A

flange

79
Q

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

A

flanged joint

80
Q

____ are usually welded or screwed.

A

flanges

81
Q

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

A

flanged joints

82
Q

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 _____.

A

grooved joints

83
Q

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

A

grooved joint

84
Q

What are the special joints?

A
  1. expansion joints
  2. slip or union joints
85
Q

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

A

water testing, air pressure testing

86
Q

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

A

water testing

87
Q

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

A

air pressure testing

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