345 Flashcards

1
Q

Which method is used to measure a pipe with a fitting at one end?

A

End to center

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2
Q

Which of the following displayed symbols describes a flanged tee?

A

C

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3
Q

What type of flange is used to seal the end of a pipe?

A

Blind

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4
Q

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

A

5ft 5.5in

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5
Q

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?

A

38.5

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6
Q

Straight internal pipe threads in pipe couplings are represented by the code letters

A

NPSC

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7
Q

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

A

nominal pipe size and number of threads/in.

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8
Q

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

A

Pitch

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9
Q

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

A

81.5

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10
Q

Ratchet threaders can be used on pipe up to about ___ inch in diameter

A

6

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11
Q

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

A

4 inches or less

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12
Q

Backing rings should always be made of

A

material compatible with the pipe material

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13
Q

Squareness is a term indicating that a pipe forms a ____ angle with another

A

90

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14
Q

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

A

Aligning the holes

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15
Q

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

A

3/16

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16
Q

A major advantage of thermoplastic pipe is that

A

it is highly resistant to corrosion

17
Q

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

A

RTRP

18
Q

The solvent cement used to install fittings on thermoplastic pipe requires ____ hours to cure completely

A

1/2 - 4

19
Q

When installing threaded fittings on plastic pipe, you should tighten the joint by hand or with a

A

Strap wrench

20
Q

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

A

Lightly sanded

21
Q

What kind of hanger is used when a rigid hanger would swing more than 4 degrees?

A

Roller

22
Q

A steam trap is a pipefitting accessory that removes

A

Condesate

23
Q

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

A

Lowest

24
Q

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

A

Filter

25
Q

What kinds of expansion joints can be used where temperature changes cause axial pipe movements?

A

Slip and bellow joints

26
Q

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

A

Air may be trapped in the the pipeline