TPC 345 Flashcards
Which of the following fixtures is used to remove very small particles from a piping system?
Filter
Which of the following should be used with a hanger to protect pipe insulation from wear?
Saddle
Which type of pipe requires that its hangers be closely spaced?
Copper
Steam traps should be installed at the ______ point in a system.
Lowest
A steam trap is a pipefitting accessory that removes
Condensate
The dimensions given between fittings in piping system drawings are usually
Center to center
The standard length of a section of pipe is __________ ft.
21
Given a 45° straight offset, with a 41-in. travel, a center-to-face elbow dimension of 2-in. and a 3/4-in. thread length, what is the end-to-end pipe length?
38.5
Which of the following displayed symbols describes a flanged tee?
||T||
Given the drawing and information below, calculate the face-to-face distance between the fittings.
5ft 4in
A pipe with a nominal diameter greater than 12 in. is identified by its
Outside Diameter
When installing a PVC socket fitting, apply the solvent with a(n)
Natural bristle brush
The effects of organic solvents can be reduced by using pipe made of
polypropylene
PVC piping should not be used to carry
Aromatics
To ensure a good bond when installing bell fittings on thermosetting pipe, the ends of the pipes should be
Lightly sanded
Which of the following is a fiberglass-reinforced thermosetting pipe material?
RTRP
Which plastic pipe material can continually soften when heated and harden when cooled?
Thermoplastic
Which of the following increases the chemical resistance of epoxy-based thermosetting pipe?
Liner added during manufacturing
When you use a pressure gauge to test a thermoplastic piping system, and the pressure on the gauge gradually increases, it means that
Air may be trapped in the pipe line
A major advantage of thermoplastic pipe is that
It is highly resistant to corrosion
Ratchet threaders can be used on pipe up to about _________ in. in diameter.
6
You need to replace a threaded pipe between 45° elbows in a straight offset. The set is 5 ft, and the travel is 7.0 ft. The center-to-face dimension of each 45° elbow is 2 in., and the pipe’s thread length is .75 in. The total end-to-end length of the replacement pipe is
82.34
Which of the following gauges is used to check external pipe threads?
Ring
In complete pipe specifications, code letters are preceded by two numbers which indicate the
Nominal pipe size and numbers of threads/in
When connecting pipes, apply sealing compound to the
Male threads only
Most sealants require __________ hr to cure completely.
24
The distance from a given point on one pipe thread to the same point on the next thread, measured parallel to the pipe centerline, is called the
Pitch
Socket-welding fittings are used for joining pipe of what diameters?
4 in. or less
The usual gap between pieces of pipe to be butt-welded is approximately
3/16
The two welds used most often in piping systems are the butt and the __________ weld.
Fillet
Which type of welding ring should be used when welding pipes with significantly different diameters?
Long spacer
Which is a common cause of weld failures?
Impurities in the metal
The major assembly consideration when fabricating flanged connections for a rolling offset is
Aligning the holes
Backing rings should always be made of
Material compatible with the pipe material
