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Plumbing > DC2 Plumbing > Flashcards

DC2 Plumbing Flashcards

0
Q

What should always be replaced when removing and installing a toilet to provide a seal between the flange and the toilet?

A

Wax ring

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1
Q

The vent for a toilet must be a minimum of how many inches in diameter?

A

Two

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2
Q

Prior to installing the hangers for a wall urinal, what do you need to check?

A

The wall for adequate framing support

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3
Q

What is the size of a urinal supply line?

A

3/4”

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4
Q

What does the sinks waste disposal drain into?

A

Building waste system

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5
Q

What should be applied to the underside lip of the sink just prior to setting the sink into the hole?

A

Silicone caulk

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6
Q

The hidden drain components on a shower and tub combination are mostly made of?

A

Rough brass and PVC

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7
Q

How are shower valves attached to supply piping?

A

Soldered

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8
Q

What part of the garbage disposal is installed first?

A

Disposals sink flange and mounting assembly

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9
Q

When there is a garbage disposal installed in a sink, where does the drain from a dishwasher connect?

A

Into the side of the garbage disposal

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10
Q

What device relieves excess pressure from a water heater?

A

Pressure temperature relief valve

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11
Q

Installation of a gas water heater requires a flue or chimney to carry what out of the house?

A

by products of combustion

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12
Q

List three safety devices that are in both gas and electric water heaters

A

Thermostat
Safety cutoff thermostat
temperature pressure relief valve

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13
Q

When is safe to disconnect electrical cables from an old water heater to remove it?

A

When the wires are dead

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14
Q

Once power has been secured, what will be done before removing an old water heater for replacement?

A

Water is drained from tank

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15
Q

Every gas water heater needs proper venting that is no smaller than the _____ of the new heater

A

new draft hood collar

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16
Q

A standard rough opening for a dishwasher must have a minimum height of approximately ____ inches from the floor to the underside of the countertop

A

34 1/2 inches

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17
Q

List the three hookup/connections required to install a dishwasher

A

Hot water supply
drain
electrical

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18
Q

How should the ice maker wire harness be plugged into the connector on the back wall of the freezer?

A

using a rocking motion until locking fingers snap into place

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19
Q

When connecting the water supply to an ice maker, you should create a service loop with ____ foot tubing

A

8ft

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20
Q

The waste drain on a toilet must be a minimum of ___ inches in diameter?

A

3inches

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21
Q

To determine the rough in dimensions of a toilet, you must measure from the center point between the ____ to the finished wall

A

bolt holes

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22
Q

The supply tubing for a urinal flushometer requires a ___ inch male adapter

A

3/4in

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23
Q

The stop valve on a flushometer contains a _____ which is sometimes covered by a chrome cap

A

water flow adjusting screw

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24
Q

When installing new sink components into a sink, what is the best postion to have the sink?

A

upside down on padded counter

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25
Q

what type of material should you place under the lip of a sink strainer prior to pushing it through the drain hole?

A

plumbers putty

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26
Q

What is the most important requirement when installing a shower?

A

Waterproofing floor and walls

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27
Q

solder shower valves are secured to the backing boards in the wall with ______ straps?

A

Copper

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28
Q

During installation, you should apply plumbers putty to what part of the garbage disposal?

A

rim of disposers flange

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29
Q

Garbage disposals have a fitting on the side that allows a _____ to be connected?

A

Dishwasher drain line

30
Q

What type of sealant should you use on the connection threads on a gas water heater to ensure a good seal?

A

Stick pipe dope

31
Q

what safety device is used on both gas and electric water heaters to prevent excess temperature or pressure from building up in the tank?

A

Temp/press relief valve

32
Q

Dishwasher drain hose generally must not exceed what length for proper drainage?

A

10’

33
Q

A dishwasher must be connected to a waste line with an air gap or a ___ inch high loop drain

A

32 inch

34
Q

Water pressure to a water pressure valve of an ice maker with a filter must have a minimum pressure of ?

A

25 psi

35
Q

Shows the location of the proposed structure and where the water and gas lines should enter the proposed building?

A

Foundation plan

36
Q

Sanitary sewer that is below ground must be made of what material?

A

Extra heavy cast iron piping and fittings of the bell and spigot type

37
Q

Sanitary sewer that is ABOVE ground must be made of

A

zinc coated, standard weight screwed end steel pipe and cast iron

38
Q

sewer vents will extend how many inches above the roof?

A

12 inches

39
Q

All male screw ends on a sewer line must be wrapped with?

A

good grade pipe joint compound

40
Q

bathtub traps must be provided with a ____ inch brass screw drain plug and be supported from the floor joist with hangers

A

3/4 inch drain plug

41
Q

Which plan shows you the location of interior walls and fixtures?

A

Floor plans

42
Q

Which plan shows you the location of existing wastewater and gas piping systems?

A

Plot plan

43
Q

Which type of line does water enter the structure from the main distribution line?

A

Cold water service line

44
Q

Blueprints are copies of what type of drawings?

A

Mechanical

45
Q

Which of the following mil standards specifies the size, format, location and type of information to be included in military blueprints?

A

Mil-std-100A

46
Q

Which of the following construction lines is a light and continuos along which the tracing is trimmed?

A

Trim line

47
Q

Which type of line is drawn outside the structure or detail to show distance?

A

Dimension line

48
Q

Which line is used in conjunction with the dimension line? it extends out from the edge or the point at which the dimension is to be determined

A

Extension line

49
Q

unions are used in which type of piping system?

A

Black iron

50
Q

seven methods of measuring pipe or tubing?

A 
end to end
center to center
end to center
end to back
Center to back
back to back
face to face
51
Q

Minimum pipe size for a toilet with flushometer is ?

A

1inch

52
Q

Urinal with flushometer inlet size?

A

3/4 inch

53
Q

Minimum inlet size for a shower bath is?

A

1/2 inch

54
Q

inlet size for a scullery sink?

A

3/4 inch

55
Q

Minimum inlet size for a domestic water heater?

A

3/4 inch

56
Q

Pex plumbing comes in 3/8 inch up to and over ___ inches

A

2 inches

57
Q

Flow rate of bathtub?

A

4 gpm at 20psi

58
Q

flow rate of lavatory sink?

A

2 gpm at 8 psi

59
Q

Flow rate of urinal ?

A

12 gpm at 25 psi

60
Q

Lavatory minimum supply size?

A

1/2 inch

61
Q

What are the four types of urinals?

A

Wall hung
Pedestal
trough
stall

62
Q

Tank type water closet minimum supply size?

A

1/2 inch

63
Q

Hot and cold water supply lines for a bathtub/shower must be of what size and spaced how far apart?

A

1/2 inch diameter spaced 8 inches apart

64
Q

What are the four methods to joining pvc?

A

Solvent welding
Fusion welding
Fillet welding
threading

65
Q

What type of fitting allows workers access to the piping system to remove blockage?

A

Cleanout

66
Q

What fitting is usually installed at the piping connection between the plumbing fixture and the waste system piping?

A

Traps

67
Q

Deep p-traps have a ___ inch water seal while a ordinary p-trap has a 2 inch trap

A

4 inch

68
Q

This type of seal loss in a trap starts when water in a fixture exits the fixture abruptly.

A

Direct siphonage

69
Q

This type of seal loss in a trap is caused by a foreign object lodged in the trap

A

Capillary action

70
Q

A pipe that allows air into a waste piping system to protect trap seals and allow sewer gases to escape

A

Vent pipe

71
Q

What is the maximum distance that a fixture supply pipe can terminate from the point of connection to the fixture?

A

30 inches

72
Q

This tee is used mostly in venting systems

A

Tapped tees

73
Q

During prolonged storage, pvc piping should not be stacked more that how many feet high?

A

2 feet high

Plumbing (1 decks)

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