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Plumbing and gas Line L > Fourth Year - Block B Piping Preparation and Assembly > Flashcards

Fourth Year - Block B Piping Preparation and Assembly Flashcards

1
Q

What are the types of copper used in the plumbing industry? What are their colours? Which is the thickest and which is the thinnest?

A

Type K - Green (Thickest)

Type L - Blue[][][][][][][][][][]]

Type M - Red (Thinnest)[]

Type DWV - Yellow[][][][][]

(ACR, Medical Gas, Type G/Gas, Type GP (General Purpose), Type H)

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2
Q

What is the most common type of copper used (or sold) in Canada?

A. Type K.

B. Type L.

C. Type M.

D. Type G.

A

C. Type M.

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3
Q

Which of the following types of copper tube will withstand the greatest bursting pressure?

A. “M”.

B. “H”.

C. “K”.

D. “L”.

A

C. “K”.

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4
Q

Which type of copper tubing is manufactured only as “hard-drawn”?

A. Type “K”.

B. Type “L”.

C. “ACR”[][]]

D. “DWV”[]]

A

D. “DWV”.

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5
Q

In the plumbing trade, copper water tube sizes are commonly specified by:

A. Their exact diameter.

B. Their nominal inside diameter.

C. Their exact outside diameter[]]

D. Their nominal outside diameter.

A

B. Their nominal inside diameter.

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6
Q

In the gasfitting and refridgeration trades, copper tubing sizes are commonly specified by:

A. Their exact inside diameter.

B. Their nominal diameter[][][][]

C. Their exact outside diameter.

D. Their nominal outside diameter.

A

C. Their exact outside diameter.

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7
Q

What is the main difference between soldering and brazing?

A

Temperature.

(Brazing: Above 840° Soldering: 840°)

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8
Q

“95-5” solder contains:

A. 95% tin, 5% lead.

B. 95% lead, 5% tin.

C. 95% tin, 5% antimony.

D. 95% lead, 5% zinc[][][]]

A

C. 95% tin, 5% antimony.

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9
Q

After a soldered joint has been completed, the joint shall be:

A. Cleaned bright.

B. Cleaned with TSP.

C. Flushed with soap solution.

D. Thoroughly cleaned of all residue.

A

D. Thoroughly cleaned of all residue.

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10
Q

The process by where molten solder is drawn into the joint is known as:

A. Capillary action.

B. Cohesion[][][][][]]

C. Convection[][][][]

D. Conduction[][][]]

A

A. Capillary action.

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11
Q

What is the process called when tee’s are extracted from copper tube? What other requirements are there with this process?

A

Extracted Tee/T-Drilling/T-Pull.

(Code clause 2.3.3.2. - Code book).

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12
Q

What would be required when brazing dissimilar metals?

A

High temperature flux.

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13
Q

What is an expansion loop used for?

A

Expansion.

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14
Q

What would you have to take into consideration when making an expansion loop with copper?

A

Loop should be large enough.

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15
Q

What are the four steps when flaring copper?

A
  1. Cut the pipe.
  2. Ream the pipe.
  3. Put the nut on the pipe.
  4. Flare the pipe[][][][][][][][][]
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16
Q

What are the four steps when using a compression fitting on copper?

A
  1. Cut the pipe.
  2. Ream the pipe.
  3. Put the nut on the pipe.
  4. Put the ferrule on the pipe.
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17
Q

What temperature do fluxes for brazing begin to melt at?

A

800-900°F.

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18
Q

A good flame for oxy-acetylene brazing would be:

A. Highly carbonizing.

B. Highly oxidizing[][][]

C. Neutral[][][][][][][][][][][]

D. Highly reducing[][][]

A

C. Neutral.

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19
Q

Brazing alloys used for joing copper tubing to copper fittings:

A. Must always be used with a flux.

B. May not require a flux[][][][][][][][][]]

C. Makes the joint brittle[][][][][][][][][]]

D. Must completely fill the joint in order to be effective.

A

B. May not require a flux.

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20
Q

To “anneal” copper means to make it:

A. Soft.

B. Hard.

C. Brittle.

D. Thin[]]

A

A. Soft.

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21
Q

What does the schedule number indicate for steel pipe?

A

Thickness.

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22
Q

Which is thicker wall, schedule 40 or schedule 80?

A

Schedule 80.

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23
Q

Standard steel pipe is classified according to size by using the nominal diameter for all sizes from 1/8 inch up to and inculding:

A. 10 inch.

B. 12 inch.

C. 14 inch.

D. 16 inch.

A

B. 12 inch.

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24
Q

What is the smallest size mild steel and wrought iron pipe that is designated by it’s OD?

A. 10 inch.

B. 12 inch.

C. 14 inch.

D. 16 inch.

A

C. 14 inch.

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25
Q

What is the number of threads per inch for a 3/4” NPS pipe?

A

14.

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26
Q

What is galvanized steel coated with?

A

Zinc.

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27
Q

Why is ductile lined pipe commonly coated with cement?

A

To prevent corrosion.

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28
Q

Which of the following black iron pipe designations would be the thinnest?

A. XH.

B. Schedule 80.

C. XXS[][][][][][][][]

D. Std[][][][][][][][]]

A

D. Std.

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29
Q

To prevent black iron pipe from rusting during transit, it’s coated with:

A. Tin.

B. Zinc.

C. Lacquer.

D. Pain[][][][]

A

C. Lacquer.

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30
Q

What does the term “pickling” refer to when dealing with the pipe?

A

Cleaning a pipe in an acid bath.

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31
Q

Which of the following is not a manufacture of steel pipe?

A. Butt weld.

B. Electro-resistance weld.

C. Seamless[][][][][][][][][][][][][][]

D. Victaulic[][][][][][][][][][][][][][][]

A

D. Victaulic.

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32
Q

How long is a standard length of black iron pipe?

A. 10 feet.

B. 12 feet.

C. 18 feet.

D. 21 feet.

A

D. 21 feet.

(Plus or minus 1/2”).

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33
Q

Grooves for joining steel pipe can be made by:

A. Rolling.

B. Knurling.

C. Cutting[]

D. Rolling or cutting.

A

D. Rolling or cutting.

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34
Q

Which letters do not designate pipe?

A. XS.

B. STD.

C. XXS.

D. XL[]]

A

D. XL.

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35
Q

ABS pipe is used principally for:

A. Non-pressure drainage of liquid and solid waste.

B. Drainage for laboratory sinks[][][][][][][][][][][][][][][][][][]

C. Building sewars[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]

D. Vacuum lines in hospitals[][][][][][][][][][][][][][][][][][][][][]]

A

A. Non-pressure drainage of liquid and solid waste.

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36
Q

When joing pex using crimp rings, how far back from the end of the tube should the crimp ring be attached?

A

1/8” - 1/4”.

37
Q

ABS and PVC are classified as:

A. Thermoplastics.

B. Thermoset plastics.

C. Hard plastics[][][][][][]

D. Soft plastics[][][][][][]]

A

A. Thermoplastics.

38
Q

True or False?

Plastic pipe must be protected from ultraviolet light?

39
Q

If you thread schedule 80 PVC pipe, by how much would you be reducing the pressure rating?

A

50%

(IPT Handbook).

40
Q

What is the sequence when joining poly E (butt fusion)?

A

Cut pipe.

Insert into a jig and shave.

Heat pipe ends on hot iron.

Press together and let set[]

41
Q

How do you test for cracks in cast iron pipe?

A

Tap it with a hammer.

42
Q

How much pipe must be cut out an existing horizontal branch to allow for the installation of a cast iron wye?

A

Length of wye plus 1/4” - 1/2”.

43
Q

Threaded drainage fittings in a vertical cast iron stack are tapped to provide:

A. A perpendicular branch connection.

B. A slope of 1/4 inch per foot[][][][][][][][]

C. A very short thread engagement[][][]

D. An opening to be used as a cleanout.

A

B. A slope of 1/4 inch per foot.

44
Q

An 1/8 bend refers to a cast-iron fitting used to change direction by:

A. 22 1/2°

B. 45°[][][]

C. 60°[][][]

D. 90°[][]]

45
Q

Which type of hanger would be best suited for supporting a 6 inch horizontal cast-iron soil pipe?

A. Adjustable swivel rings.

B. Perforated steel (strap iron).

C. Adjustable clevis[][][][][][][][][][]

D. Roller[][][][][][][][][][][][][][][][][][][][]]

A

C. Adjustable clevis.

46
Q

Which of the following hangers would be best suited for use on a 6 inch galvanized cold water line?

A. 3/4” perforated strap.

B. 6” roller hanger with insulation.

C. 6” clevis hanger[][][][][][][][][][][][][][]

D. 8” clevis hanger with insulation shield.

A

D. 8” clevis hanger with insulation shield.

47
Q

What type of hanger would you use to hang steam lines?

A

Roller hanger.

48
Q

What type of hanger would you use to support multiple pipelines?

A

Trapeze hanger.

49
Q

What would be best used to prevent a clevis hanger from crushing the insulation on a chilled water line?

A

Insulation shield.

50
Q

Ready-rod for pipe hangers is commonly threaded into what type of device when it’s to be suspended from a steel I-beam?

A. Ceiling plate.

B. C-clamp[][][][]]

C. Beam clamp[]

D. Toggle bolt[][]

A

C. Beam clamp.

51
Q

What type of pipe support would be used on a 4 inch steel riser passing through 6 stories of a building?

A. Reznor hooks.

B. Clevis hanger[]

C. Riser clamps[][]

D. Roller hangers

A

C. Riser clamps.

(Called rests in the codebook).

52
Q

Which of the following valves would create the greatest friction loss when fully open?

A. Ball valve.

B. Straight pattern globe valve.

C. Gate valve[][][][][][][][][][][][][][][][]

D. Angle pattern globe valve[][]

A

B. Straight pattern globe valve.

53
Q

Which is better for throttling, a globe valve or a gate valve?

A

Globe valve.

54
Q

When bypassing a pressure reducing valve, it is advisable to use a/an:

A. Gate valve.

B. Plug valve[]

C. Globe valve.

D. O.S. & Y Valve.

A

C. Globe valve.

55
Q

Of the following, which would be the most common valve used for throttling flow?

A. Gate valve.

B. Ball valve[]]

C. Needle valve.

D. O.S. & Y Valve.

A

C. Needle valve.

56
Q

The hex nut on the side of a check valve serves to:

A. Control flow.

B. Put tension on the check disc.

C. Remove the pin and disc[][][][][]

D. Reset the valve after it actuates.

A

C. Remove the pin and disc.

57
Q

Which type of valve is commonly used for food process applications?

A. Gate valve.

B. Glove valve.

C. Ball valve[][]]

D. Diaphram valve.

A

D. Diaphram valve.

58
Q

If a solenoid valve is installed in a liquid system, what holds it closed?

A. Electricity.

B. Electricity and a spring.

C. Hyrdraulic force[][][][][][][]

D. Hydraulic force and a spring.

A

D. Hydraulic force and a spring.

59
Q

If you come upon threads on a pipe that are either too tight or too lose, what should you do?

A. Lubricate.

B. Teflon[][][]]

C. Adjust dies.

A

C. Adjust dies.

60
Q

The thread cut on a pipe is known as:

A. Male bolt thread.

B. Female bolt thread.

C. Male taper thread[]]

D. Female taper thread.

A

C. Male taper thread.

61
Q

The lead on the chasers:

A. Allows the dies to start on the pipe.

B. Clears the chips from the dies[][][][][]

C. Cuts the perfect threads[][][][][][][][][][]

D. Keeps the pipe from heating up during threading.

A

A. Allows the dies to start on the pipe.

62
Q

If a screwed cast iron fitting is tightened excessively, what could result?

A. Nothing.

B. Stripped threads on pipe or in fitting.

C. The fitting may crack[][][][][][][][][][][][][][][]

D. The pipe may tear[][][][][][][][][][][][][][][][][]

A

C. The fitting may crack.

63
Q

Why do we not ream pipe AFTER threading it?

A. The reamer can be damaged.

B. The starting threads can be damaged.

C. The pipe end can flare outward[][][][][][]]

D. The reamer won’t fit inside a threaded pipe.

A

C. The pipe end can flare outward.

64
Q

Pipe dope is applied to pipe threads primarily to:

A. Seal the joint.

B. Lubricate the threads.

C. Make up for bad threads.

D. Increase friction when tightening.

A

B. Lubricate the threads.

65
Q

Pipe dope should be applied:

A. To the external threads only.

B. To the internal threads only[]

C. To both internal and external threads.

D. Only if a liquid is going to be conveyed.

A

A. To the external threads only.

66
Q

What is pyrex pipe?

What is it used for[]?

How is it put together?

A

Glass pipe.

Acid waste.

Mechanical joints.

(Couplings must be wetted down with water before use).

67
Q

Which of the following materials would NOT be suited for draining acid waste?

A. Duriron.

B. Pyrex[][]]

C. Polyolefin.

D. Lead[][][][]]

68
Q

What is the correct naming sequence for describing a tee fitting?

A
  1. Larger opening run.
  2. Smaller opening run.
  3. Branch[][][][][][][][][][][][][]
69
Q

What does the term NC stand for?

A

National course.

(Ready rod - Straight thread - No taper).

70
Q

What does the term NPT stand for?

A

National pipe thread.

(Tapered - Regular thread for black iron pipe).

71
Q

What does the term NPS stand for?

A

Nominal pipe size.

72
Q

How would you connect a piece of PVC pipe to asbestos cement pipe?

A

Mechanical joint.

73
Q

What type of fitting would you use if you were to connect a copper pipe to a galvanized pipe?

A

Di-electric fitting.

74
Q

How is concrete bell and spigot pipe assembled?

A

Rubber gasket.

(Lube the spigot and the gasket in the bell).

75
Q

What are the four steps when installing draining pipe underground?

A
  1. Bed it.
  2. Grade it.
  3. Test it[][]
  4. Flush it.
76
Q

Which of the following is a non-ferrous metal?

A. Stainless steel.

B. Duriron[][][][][][][]

C. Wrought iron[]]

D. Tin[][][][][][][][][][]]

77
Q

Which of the following materials would be classified as “ferrous”?

A. Copper.

B. Lead[][]]

C. Cast iron.

D. Bronze[]]

A

C. Cast iron.

78
Q

What is tubing gain?

A

Pickup.

Tube stretch.

79
Q

The inside walls of pipe should be free of burrs and other obstructions:

A. To decrease the possibility of leaks.

B. To decrease frictional resistance[][][]

C. To prevent corrosion[][][][][][][][][][][][][]]

D. To allow the dies to start easily[][][][]

A

B. To decrease frictional resistance.

80
Q

The letters “W.O.G.” stamped on a valve body mean:

A. Waste, oil, galvanized.

B. Water, oil and gas[][][][]

C. Waste, oil and gas[][][][]

D. Water, oxygen and galvanized.

A

B. Water, oil and gas.

81
Q

According to the specifications “(4) - 1/4 x 2” brass nipples”. The length of the nipple is:

A. 1/4”.

B. 2”[]]

C. 4”[]]

D. Not indicated.

82
Q

In reference to the figure below, what is the minimum distance that a balancing valve or flow meter should be installed UPSTREAM of another fitting?

A. As close as possible.

B. At least 5 pipe diameters.

C. At least 10 pipe diameters.

D. As far as possible[][][][][][][]]

A

B. At least 5 pipe diameters.

(A better answer is as per manufacturer).

83
Q

How do you identify the type of gasket required for groove in shoulder (victaulic) type couplings?

A

Colour of gasket.

Marking on pipe.

Thickness[][][][][][]]

84
Q

How do you cut asbestos cement (AC) pipe?

A

Wet the pipe.

Use a slow velocity cutter.

85
Q

How do you attach a copper spun roof drain?

86
Q

Name 5 flanges used in the pipefitting industry.

A

Lap-joint flange.

Reducing flange.

Slip-on flange[][]]

Socket weld flange.

Weld-neck flange[]]

87
Q

What is a spool drawing?

A

Part or section of a larger drawing.

88
Q

In pipe fitting, what does a wraparound refer to?

A

Scribe a line nicely around the pipe.

89
Q

In reference to pipe fitting, what is threadolet?

A

Forged pipe fitting.

Plumbing and gas Line L (30 decks)

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