Pipe System TPC 306 Flashcards
A fluid is defined as a material that can
Condense
Expand
Flow
Freeze
Flow
The purpose of a steam trap is to remove______ from a pipeline
Air
Impurities
Liquid water
Steam
Liquid water
sections of pipe, tubing, and hose are connected together by means of components called
Attachments
Fittings
Joints
Links
Fittings 
A serious loss of pressure in a piping system may be caused by a
Closed safety valve
Loss of friction
Low fluid speed
Sludge buildup
Sludge buildup
If the speed of a fluid moving through a pipeline increases to four times the original speed, the effect of friction will be multiplied by
2
4
8
16 
16
Pipe sizes greater than_____in. are usually the outside diameter of the pipe, rather than the inside diameter
3
6
12
18
12
A pipe that carries air conditioning fluid from one part of a building to another is an example of a____ line
Process
Service
Trunk
Working
Service 
A metal that contains iron is called a(n)____ metal.
Ductile
Ferrous
Malleable
Wrought
Ferrous
The friction created by fluid flowing through a pipe is likely to be high if the fluids_____is high
Density
Pressure
Temperature
Viscosity
Viscosity
If a liquid flowing in a line is suddenly stopped by a rapid valve closure._____ may occur.
Condensation
Pressure loss
Vaporization
Water hammer
Water hammer
The most corrosive proof drain pipe for industrial waste is made of
Asbestos cements
Cast-iron
Concrete
Vitrified Clay
Vitrified clay 
Reinforced concrete pipe that includes a welded steel shell in the concrete is called______ pipe
ABS
Cylinder
Tensile
Vitrified
Cylinder
What kind of piping a self insulating?
Asbestos cement
Concrete
Glass
Plastic
Plastic
A disadvantage of connecting plastic pipe with threaded joins is that the threads?
Are difficult to cut
Cause leaks
Interfere with the flow of fluid
Weaken the pipe
Weaken the pipe 
Glass pipe is especially useful for certain applications because it
Can contain high pressures
Has no thermal expansion or contraction
Requires no special fittings to join sections
Resist contamination
Resist contamination
Which of the following is the best advantage of tubing over piping?
Flexibility
Low cost
Neat appearance
Rigidity
Flexibility 
Which of the following is commonly eliminated by the use of tubing?
Many fittings
Need for Welded joints
Source of vibration
Water hammer
Many fittings 
Work hardening is most likely a problem when you cut______ tubing with a tube cutter
Aluminum
Copper
Plastic
Stainless steel
Stainless steel 
Sections of aluminum tubing are usually joined by
Flaring
Soldering
Threading
Welding or brazing
Welding or brazing
Fusion is the process used for joining tubing made of
Copper
Plastic
Stainless steel
Steel
Plastic 
A hose is identified as being -32(dash32). What size is it?
2 inch ID
2 inch OD
3.2 inch ID.
3.2 inch OD.
2 inch ID
What does the term “braid” refer to when applied to hose?
Cover
Method of connecting hose sections
Pattern of inner core
Reinforcement
Reinforcement 
The vacuum rating of a hose refers to its
Collapse point
Pressure capacity
Steam-carrying capability
Working pressure
Collapse point 
What kind of hose should be chosen for caring a process solution that has a temperature of 400°F?
Dacron
Nylon
Polyethylene
Teflon
Teflon
If a steam hose begins to fail near one end, the minimum solution to the problem is to.
Remove the failure and re-couple the hose
Remove at least 1 foot of the hose past the failure
Remove at least 1 foot of hose past the failure and reverse the hose
Replace the entire hose
Remove at least 1 foot of hose past the failure and reverse the hose
The designation “ 200 LB” refers to a fittings
Safe pressure rating
Strength,
Support requirement
Weight

Safe pressure rating
A short-radius elbow has a center-to-face measurement equal to______ times the pipe diameter. A long-radius elbow has a center to face measurement equal to_______ times the pipe diameter
3/4;1
3/4;1 1/2
1;1 1/2
1 1/2; 2
1;1 1/2
The straight flow-through section of a tee fitting is called the
Line
Pass through
Run
Straight
Run
A large bend or loop is usually included in high-temperature lines to
Allow for thermal expansion
Get around corners
Prevent water hammer
Provide a seal
Allow for thermal expansion
What type of fitting helps reduce the effects of water hammer?
Compression fitting
Expansion bend
Hammer tap
Vibration dampener
Vibration dampener 
The proper size valve for a 3 inch pipeline is a_______ inch valve
2 1/2
3
3 1/4
3 1/2 
3
The part of a valve that is directly connected to the piping is called the
Body
Bonnet
Seat
Trim
Body
A needle valve is particularly suitable for______ control
Accurate throttling
High pressure
Large volume
Rapid on and off
Accurate throttling

Where a check valve is required, you should install a swing type valve if
Resistance to flow must be minimal
The fluid is a thick slurry
The operation must be quiet
Two-way flow is required
Resistance to flow must be minimal
The______ in an industrial valve is the same part that is called a “ washer” in a household valve
Gasket
Packing
Seal
Stem
Seal 
The type of valve, the best avoids contaminating the fluid with valve. Lubricant is the.______ valve
Ball
Diaphragm
Needle
Rupture- disc
Diaphragm 
Boiler blow off valves are designed to be slow acting in order to
Discourage, excessive use
Give the operator time to get out of the way
Make the valve easier to operate
Prevent shocking the boiler system
Prevent shocking the boiler system 
A pressure-regulating valve is required when a constant pressure must be maintained and the systems demand for fluid is
Always changing
Consistent
High
Low
Always changing
Safety valves are generally used with_____ relief valves are generally used with_____
air; steam
Gases; liquids
Liquids; gases
Steam; air
Gases; liquids 
What particular advantage does a ruptured disc relief valve have?
Can be installed in any position
Can be set with extreme accuracy
Does not need to be reset
Quickly relieves large volumes of fluid
Quickly relieves large volumes of fluid
One way that solid particles can cause problems in the valve in a high-pressure line is by
Contaminating the fluid
Increasing the fluid friction
Preventing a valve from closing tightly
Reducing the pressure
Preventing a valve from closing tightly 
And advantage of a duplex filter, is that it
Allows one filter element to keep working while the other is cleaned
Filters the fluid twice
Increases the service life of the elements
Removes twice as much material as a single filter
Allows one filter element to keep working while the other is cleaned 
In a steam system, saturated steam can become superheated steam if the
Line becomes blocked
Pressure drops
Pressure rises
Traps do not function
Pressure drops

A steam trap may not operate properly if the_____ becomes too high
Differential pressure
Inlet pressure
Outlet pressure
Temperature
Differential pressure
Periodic maintenance of a steam trap includes removing any accumulated
Condensate
Scale
Sludge
Steam
 Sludge 
A pressure gauge reads 21.8 psig. What is the absolute pressure?
7.1 psia
14.7 psia
21.8 psia
36.5 psia
36.5 psia
An industrial mercury thermometer encloses the bulb and capillary tube in a _____ for protection
Fluid pipeline
Metal tube
Steel mesh cage
Union fitting
Metal tube 
A vacuum breaker prevent the formation of a vacuum and a line by
Allowing air to enter
Forcing the vacuum out of the line
Isolating the vacuum in the line
Sealing the system
Allowing air to enter 
The regulator in a pneumatic line maintains a constant
Air pressure
Compressor speed
Flow rate
Oil content 
Air pressure
The purpose of an aftercooler in a compressed air system is to cool the air coming from the
Compressor
Pipeline
Receiver
Tool 
Compressor 
