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E6 > PLUMBING > Flashcards

PLUMBING Flashcards

1
Q

What is the rule of thumb for grading a sewer line?

A

1/4 inch per foot

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2
Q

When a pipeline must cross under a road, the trench must be at least what depth?

A

4 feet

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3
Q

What weight of pipe is adequate for most Navy base construction?

A

SV (Extra Heavy Standard)

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4
Q

What tools for cutting CSIP should be used only if the most appropriate tools are not available?

A

Abrasive cutter

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5
Q

A 1/16th bend changes the direction of a pipeline a total of how many degrees?

A

22 1/2”

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6
Q

What type of tee should you use to connect lines of different sizes?

A

Reducing

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7
Q

Which of the following types of 90 degree Y-Branches can be used as an individual vent?

A

Double

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8
Q

Horizontal 4- inch building drain lines in a straight run should have clean outs places at what minimum intervals?

A

50 feet

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9
Q

A long hubbed fitting used for insertion into an existing line is called a______?

A

Sisson

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10
Q

What special fitting should be inserted into a soil branch for use with a water closet?

A

A closet bend?

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11
Q

If the gas pressure of a propane furnace puts ou the lighter flame, you should____?

A

Close the fuel valve

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12
Q

To ensure plastic pipe and fittings are thermally balanced you should keep them at the same temperature for what length of time before welding?

A

60 minutes

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13
Q

What are the four methods of joining plastic pipe?

A

Fusion Welding
Fillet Welding
Threading
Solvent Welding

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14
Q

What is the most popular test for checking leakage of sewer pipe after the roughing-in is completed?

A

Water

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15
Q

What action should you take when a pipeline you are testing for leaks, by the air method, does not hold a pressure of 5 psi for 15 minutes?

A

Apply a soapy water solution to the joints and look for bubbles.

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16
Q

Changes in sizes of sewer lines should be made only at what part of the sewer system?

A

Manholes

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17
Q

When backfilling sewer systems, you fill to 2 feet above the pipe by hand with clean material. When, if ever, should you tamp the backfill material?

A

Every 4 inches

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18
Q

What type of above ground pipe has a zinc coating to protect it against acid waste?

A

Galvanized wrought iron

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19
Q

What type of pipe consists of an alloy of zinc and copper?

A

Brass

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20
Q

What is the most important function of a trap?

A

To prevent sewer gases from entering a building.

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21
Q

What does the term “trap seal” mean in plumbing?

A

The water held in the bent portion of a fixture

22
Q

What is the purpose of vent piping in a plumbing system?

A

To maintain the seals of fixture traps.

23
Q

What portion of the venting system extends above the highest fixture branch?

A

The main soil and waste vent

24
Q

What type of vent is used to vent two traps to a single pipe?

A

Common

25
Q

What maximum number of fixtures is permitted on a circuit vent system?

A

Eight

26
Q

A wet vent that drains five fixture units must have a diameter that is what size in inches?

A

2

27
Q

Cast-iron pipe for water supply systems comes in standard lengths of how many feet?

A

5

28
Q

What are the three major types of fittings used with cast-iron water pipes?

A

Tees
Bends
Elbows

29
Q

A measurement was taken from end of a pipe to the center of a fitting. What type of measurement was used?

A

End to end

30
Q

How can you join two pieces of copper tubing?

A

By soldered or flared fittings

31
Q

You have hacksawed a piece of copper tubing for flaring. Before making the flare on one end, you should perform which of the following actions?

A

Slip a flare nut on the copper tubing

31
Q

How will the kitchen, bathroom, and laundry areas be placed in a well planned building?

A

Back-to-back
Above each other
Below each other

32
Q

In an efficient kitchen design, stove, fridge, and sink are placed so that traffic between them forms a tight triangle. The recommended combined distance between the three should not exceed _____ feet.

A

22

33
Q

When designing plumbing for a utility room, what four fixtures usually need to be accounted for?

A

Washer
Water heater
Water softener
Water filter

34
Q

What has to be selected before rough-in dimensions can be determined?

A

fixtures

35
Q

What three systems comprise a typical residential plumbing system?

A

Drain-waste-vent piping system
Water supply piping system
Storm water piping system

36
Q

How is the storm drain system piping different from the DWV system piping?

A

Only collects water that is unpolluted and caries it to the storm sewer.

37
Q

What determines which type of material will be used for the DWV system?

A

Local Plumbing code requirements
Cost
Preference of owner

38
Q

What can happen if the DWV pipe size for a fixture is too small?

A

Waste will not be permitted to flow properly from the fixture.

39
Q

During which stage of an estimate will fixtures, faucets, and parts needed for their connection be identified?

A

Finish stage

40
Q

What occurs during the FIRST stage of plumbing?

A

Water supply and sewer lines are extended from the mains (usually in the street) to the building.

41
Q

What stage of plumbing is when all the plumbing that will be enclosed in the walls are installed?

A

Second stage

42
Q

What is considered to be an adequate slope for the horizontal runs on the storm drain and DWV piping systems?

A

1/8” to 1/2” per foot

43
Q

How do skilled plumbers try to locate/arrange piping while designing a plumbing system?

A

Group fixtures in rooms and floors as much as possible

44
Q

What type of paper is not suitable for use in the DWV system?

A

Black iron

45
Q

What is the standard load factor for a flush-valve operated water closet?

A

8

46
Q

What codes are used as the FINAL authority for determining size and slope drainage pipe connecting soil stacks to the sewer or septic tank?

A

Local plumbing codes

47
Q

What condition is caused when a difference in pressure exists between two piping systems?

A

Cross-connection

48
Q

What is the FIRST and one of the most important steps in estimating a plumbing project?

A

Understanding what is to be accomplished

49
Q

At a MINIMUM, what information should be identified on a Material and Supply list for a plumbing project?

A

Description, Quantity, Size

50
Q

What size water supply pipe is recommended for use on a shower?

A

1/2”

E6 (5 decks)

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