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TPC > Piping > Flashcards

Piping Flashcards

1
Q

Pipes and fittings are made from which of the following materials

A
  • glass
  • plastic
  • stainless steel
  • all the above
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2
Q

Any substance or material that flows is defined as a

A
  • fluid
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3
Q

Why is a steam trap used in a steam line?

A
  • collect condensate
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4
Q

To make a turn, a pipeline is fitted with which of the following?

A
  • elbow
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5
Q

What happens when sludge or corrosion reduce the I.D. of piping?

A
  • pressure decreases
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6
Q

If the speed of a fluid is doubled, the friction will

A
  • increase 4 times
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7
Q

Protective devices in a piping system include what components?

A
  • filters
  • strainers
  • safety valves
  • all of the above
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8
Q

Why are expansion joints installed in a pipline?

A
  • allow for expansion and contraction of the line
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9
Q

What is the best insurance for keeping a piping system operating efficiently?

A
  • routine preventive maintenance
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10
Q

Most piping system problems are caused by

A
  • leakage and corrosion
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11
Q

What terms are used to express pipe diamensions

A
  • outside diameter
  • inside diameter
  • inches and fractions of inches
  • all of the above
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12
Q

A pipe smaller than 12” in diameter is normally designated by its

A
  • I.D.
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13
Q

The wall thickness of a 12” in diameter, Schedule 80 (Extra-Strong) pipe is

A
  • 1/2 (.500”)
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14
Q

What is the class of pipeline used to carry compressed air?

A
  • service
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15
Q

A ferrous metal always contains

A
  • iron
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16
Q

As fluid viscosity decreases, friction in the line

A
  • decreases
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17
Q

Water hammer in a piping system occurs when the

A
  • flow is suddenly slowed or stopped
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18
Q

Welded joints are preferred for applications that involve

A
  • high temperatures, high pressures
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19
Q

One way to avoid weld icicles and splatter in a pipe weld is to use a

A
  • backing ring
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20
Q

What is used to prevent oxides from forming when brazing a pipe?

A
  • acid flux
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21
Q

Metal piping is sometimes lined with non-metallic piping materials to provide

A
  • corrosion resistance
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22
Q

How much extra capacity, in percent, is a waste pipeline usually designed to have

A
  • 40%
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23
Q

What is the strongest, most pressure-resistant concrete pipe?

A
  • Reinforced-and-prestressed
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24
Q

Asbestos-cement pipe has the advantage of high resistance to

A
  • corrosion
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25
Q

Plastic piping has which of the following qualities??

A
  • Self-insulating properties
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26
Q

Sections of plastic pipe can be joined by which of the following methods

A
  • threading
  • welding
  • butt-and-strap joints
  • all the above
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27
Q

Which method can also be used to repair leaks in thermoplastic piping?

A
  • fillet welding
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28
Q

The correct wrench to us on plastic pipe is

A
  • strap wrench
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29
Q

What should you check for when maintaining nonmetallic piping?

A
  • leakage
  • corrosion
  • secure supports
  • all the above
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30
Q

Nonmetallic piping can be joined to metal piping by

A
  • flanges
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31
Q

If the wall-thickness gage of tubing is not specified, you know that it is made to

A
  • Birmingham Wire Gage (BWG)
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32
Q

Standard steel tubing ranges in size from

A
  • 3/16” to 10-3/4”

- 1/32” to 12” Modern

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33
Q

Compared to pipe, tubing is

A
  • flexible
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34
Q

Which of the following methods are used for joining tubing?

A
  • brazing
  • welding
  • threading
  • all the above
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35
Q

What kind of tubing would be used for a food-processing or “clean room” application?

A
  • aluminum or stainless
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36
Q

With tubing, the term “impact method” refers to what kind of operation?

A
  • flaring
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37
Q

Before tubing can be bent or flared, it should be

A
  • annealed
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38
Q

Which of the following tube materials is strong enough to be threaded?

A
  • steel
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39
Q

What type of tubing is best to use for low-pressure operation at extremely low temperatures?

A
  • aluminum
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40
Q

Plastic tubes are joined by what method?

A
  • fusion
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41
Q

What effects must hoses be protected against?

A
  • temperature
  • pressure
  • corrosion
  • all the above
42
Q

What is the diameter of a -16 (dash 16) hose in inches?

A
  • 1”
43
Q

The most common hose for general use is of what type construction?

A
  • Reinforced nonmetallic
44
Q

The inner suction of a hose is called the

A
  • tube
45
Q

To what general classification of pressure does a hose carrying 2500PSI belong?

A
  • medium (2500-3000)
46
Q

The type of hose construction most suited to maximum suction is

A
  • wire reinforced
47
Q

The nonmetallic hose best suited for use at extremely low temperatures is

A
  • dacron
48
Q

Interlocked metal hose is used in what type of application?

A
  • low pressure
49
Q

Where materials are distributed from one source to several points, what kind of coupling will most likely be used?

A
  • quick connect-disconnect
50
Q

What should you look for when inspecting a steam hose?

A
  • brittleness
  • swelling
  • softening or cover breaks
  • all the above
51
Q

Which of the following functions are performed with the use of fittings?

A
  • change the direction of fluid flow
  • provide branch connections
  • change the size of pipe and tubing lines
  • all the above
52
Q

What does C/F (centreline to face) distance equal in a long radius elbow?

A
  • 1-1/2 times the fitting diameter
53
Q

For best fluid flow, which of the following elbows should be used?

A
  • long radius
54
Q

The fitting that provides two smaller branches is called a

A
  • reducing cross
55
Q

A union is used for which of the following?

A
  • connect two sections of pipe or tubing
56
Q

What can be used with screwed connections to make them leakproof

A
  • paste dope
  • teflon tape
  • properly cut threads
  • all the above
57
Q

Which of the following flanged joints uses a gasket?

A
  • bolted flange
58
Q

A flange that has a plain or flat face should be joined to a flange that has a

A
  • plain face
59
Q

What fitting helps reduce the effect of water hammer?

A
  • vibration dampener
60
Q

Match the symbols in order of type of connections: flanged, welded, bell-and-spigot, soldered

A
  • -II- , -X- , -)- , -O-
61
Q

Most valves are named after the

A
  • internal closing element
62
Q

A gate valve that has two ports and is designed for fluid flow in one direction only is considered a

A
  • two-way valve
63
Q

Which of the following valves provides the most accurate throttling?

A
  • needle
64
Q

When an application calls for fast on-off operation, low pressure drop, good sealing, and flow in both directions, which of the following valves is the best choice?

A
  • Ball valve
65
Q

Large butterfly valves are most likely to be operated by

A
  • electric or hydraulic power
66
Q

The opening in the cylinder of a plug valve designed for throttling service is usually what shape

A
  • diamond
67
Q

Which of the following is true of a check valve?

A
  • closes automatically
  • ensures proper flow direction
  • may be installed vertically or horizontally, depending on the type
  • all of the above
68
Q

What type of check valve should be used where pressure drop is the major consideration

A
  • swing
69
Q

Water for emergency showers is best controlled through use of

A
  • quick-opening valves
70
Q

The first step to good valve maintenance is

A
  • careful, periodic inspection
71
Q

What is the best valve to use for a vacuum application?

A
  • diaphragm valve
72
Q

Which of the following does a diaphragm valve eliminate?

A
  • lubricant contamination of fluid
73
Q

Blowoff valves in steam boiler applications are used to do which of the following?

A
  • blow down boiler pressure
  • rapidly lower boiler water level
  • clear cleaning solution from boiler
  • all of the above
74
Q

What do pressure-regulating valves do?

A
  • keep line pressure at a preset level
75
Q

In valves, what is feedback?

A
  • outlet pressure controlling inlet pressure
76
Q

It is customary to install additional valves in a section of piping that includes which of the following valves?

A
  • rupture-disc relief
  • pressure regulating
  • pressure reducing
  • all of the above
77
Q

The control unit of a temperature regulating valve includes a

A
  • thermostat
78
Q

The disc of a rupture-disc relief valve is usually made of

A
  • metal
79
Q

Which of the following would be installed to help balance pressure on either side of a main valve?

A
  • bypass valve
80
Q

A direct-opening valve is opened and closed by a

A
  • solenoid plunger
81
Q

Solid particles in the fluid have what harmful effects in a piping system?

A
  • score pipe or tubing walls
  • damage seals and fittings
  • damage pump parts
  • all the above
82
Q

Which of the following valve problems is caused by solid particles in the fluid?

A
  • valve closing elements jammed
83
Q

Where is the coarse screen placed in a strainer?

A
  • inside the fine screen
84
Q

What should you do as the first step when removing a strainer for cleaning?

A
  • shut off the line
85
Q

On which side of the filter element do filtered particles collect?

A
  • entry side
86
Q

What is a filter through which all the oil in a system passes called?

A
  • full flow
87
Q

What happens in a piping system carrying saturated steam (100psi @ 170°) if the steam pressure drops to 50 PSI?

A
  • steam flashes to superheated
88
Q

Where there are slight variations in load or pressure, which of the following traps are usually used

A
  • Upright or open bucket trap
89
Q

In which of the following are air-vent valves used?

A
  • oil lines
90
Q

Why is it difficult to lubricate steam traps?

A
  • because of water-steam mixture
91
Q

It is necessary to maintain proper pressure level in a piping system to

A
  • have the most efficient transportation of fluids
92
Q

A pressure gage reads 30 PSI at sea level. What is tha absolute pressure?

A
  • 44.7 psia
93
Q

Fluid pressure of 10 psi is pushing against an area of 5 square inches, what is the total force against the area?

A
  • 50 pounds
94
Q

Which of the following gage elements are spring-loaded?

A
  • plunger
  • bellows
  • bourdon tube
  • all the above
95
Q

The component that connects a revolving unit with a fluid line is called a

A
  • rotary pressure joint
96
Q

For what reasons can vacuum in a pipeline be a problem?

A
  • fluids may run in wrong direction
  • the line may collapse
  • the fluid may become contaminated
  • all the above
97
Q

When pressure rises in a compressed air line, what happens to the air in the receiver?

A
  • the air is compressed
98
Q

Which of the following is the work performing element in an electric actuator?

A
  • motor and screw-driven shaft
99
Q

The area of an intensifier’s small piston is 2 square inches, area of the large piston is 6 square inches, input pressure is 40 psi. What is the output of the small piston in psi?

A
  • 120 PSI
  • piston area ratio
  • output / input x pressure
100
Q

Which of the following wrenches should you use on plated or polished pipe?

A

strap wrench

TPC (5 decks)

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