TPC 345

Question 1

Which of the following fixtures is used to remove very small particles from a piping system?

Answer 1

Filter

Question 2

Which of the following should be used with a hanger to protect pipe insulation from wear?

Answer 2

Saddle

Question 3

Which type of pipe requires that its hangers be closely spaced?

Answer 3

Copper

Question 4

Steam traps should be installed at the ______ point in a system.

Answer 4

Lowest

Question 5

A steam trap is a pipefitting accessory that removes

Answer 5

Condensate

Question 6

The dimensions given between fittings in piping system drawings are usually

Answer 6

Center to center

Question 7

The standard length of a section of pipe is __________ ft.

Answer 7

21

Question 8

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?

Answer 8

38.5

Question 9

Which of the following displayed symbols describes a flanged tee?

Answer 9

||T||

Question 10

Given the drawing and information below, calculate the face-to-face distance between the fittings.

Answer 10

5ft 4in

Question 11

A pipe with a nominal diameter greater than 12 in. is identified by its

Answer 11

Outside Diameter

Question 12

When installing a PVC socket fitting, apply the solvent with a(n)

Answer 12

Natural bristle brush

Question 13

The effects of organic solvents can be reduced by using pipe made of

Answer 13

polypropylene

Question 14

PVC piping should not be used to carry

Answer 14

Aromatics

Question 15

To ensure a good bond when installing bell fittings on thermosetting pipe, the ends of the pipes should be

Answer 15

Lightly sanded

Question 16

Which of the following is a fiberglass-reinforced thermosetting pipe material?

Answer 16

RTRP

Question 17

Which plastic pipe material can continually soften when heated and harden when cooled?

Answer 17

Thermoplastic

Question 18

Which of the following increases the chemical resistance of epoxy-based thermosetting pipe?

Answer 18

Liner added during manufacturing

Question 19

When you use a pressure gauge to test a thermoplastic piping system, and the pressure on the gauge gradually increases, it means that

Answer 19

Air may be trapped in the pipe line

Question 20

A major advantage of thermoplastic pipe is that

Answer 20

It is highly resistant to corrosion

Question 21

Ratchet threaders can be used on pipe up to about _________ in. in diameter.

Answer 21

6

Question 22

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

Answer 22

82.34

Question 23

Which of the following gauges is used to check external pipe threads?

Answer 23

Ring

Question 24

In complete pipe specifications, code letters are preceded by two numbers which indicate the

Answer 24

Nominal pipe size and numbers of threads/in

Question 25

When connecting pipes, apply sealing compound to the

Answer 25

Male threads only

Question 26

Most sealants require __________ hr to cure completely.

Answer 26

24

Question 27

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

Answer 27

Pitch

Question 28

Socket-welding fittings are used for joining pipe of what diameters?

Answer 28

4 in. or less

Question 29

The usual gap between pieces of pipe to be butt-welded is approximately

Answer 29

3/16

Question 30

The two welds used most often in piping systems are the butt and the __________ weld.

Answer 30

Fillet

Question 31

Which type of welding ring should be used when welding pipes with significantly different diameters?

Answer 31

Long spacer

Question 32

Which is a common cause of weld failures?

Answer 32

Impurities in the metal

Question 33

The major assembly consideration when fabricating flanged connections for a rolling offset is

Answer 33

Aligning the holes

Question 34

Backing rings should always be made of

Answer 34

Material compatible with the pipe material