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PB1 Safety And Materials > Midterm Practice > Flashcards

Midterm Practice Flashcards

1
Q

What is the max working temperature of the following plastic pipes:

1) CPVC
2) PP (polypropylene)
3) ABS
4) PVC
5) PE (polyethylene)

A

1) CPVC 212°F (100°C)
2) PP 180°F (82°C) - proxylene
3) ABS 180°F (82°C)
4) PVC 140°F (60°C)
5) PE 130°F (55°C) -pex

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2
Q

How is fibreglass pipe joined?

A

Butt and strap or e.r.w.

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3
Q

Before butt welding plastic pipe and fittings you must ensure?

A

That pipe ends are square

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4
Q

What should you put in a plastic pipe before you thread it?

A

A wooden plug

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5
Q

What is the max working temp of ABS pipe

A

180°F (82°C)

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6
Q

What color is the cement for ABS DWV pipe and fittings?

A

Yellow

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7
Q

Gate valves are designed to operate either fully open or fully closed?
A) True
B) False

A

A) True

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8
Q

Is a ball valve suitable for throttling fluids?

A

No

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9
Q

Valve handles are typically installed in what position?

A

The open position

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10
Q

Does bent copper tube have a higher bursting pressure than that of regular copper tube?

A

Yes

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11
Q

You should ensure that the valve is _____ before making any repairs to the valve.

A

Isolated

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12
Q

Are gate valves designed to operate either fully open or fully closed?

A

Yes

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13
Q

Is type K copper tube designed for bending

A

No…type K has the thickest wall of the five types of copper tube

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14
Q

What is the most common degree flare fitting?

A

45°

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15
Q

What are high pressure compression fittings rated for?

A

10,000 PSI

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16
Q

Bell type joints are primarily used for?

A

Below ground sanitary and storm drainage

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17
Q

Thrust blocks are used for?

A

Controlling forces caused by the movement of fluids and pipe

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18
Q

Before inserting the male end of the bell pipe into the socket you should?

A

Apply lubricant

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19
Q

What does chamfering mean?

A

To bevel male end before inserting into female fitting

20
Q

Adding magnesium to cast iron will?

A

Increase its strength

21
Q

The carbon content of cast-iron makes it?

A

Very brittle

22
Q

What is the most widely used type of cast-iron?

A

Black cast-iron

23
Q

How are cast-iron pipes that have a hub and spigot ends joined?

A

Compression, lead and oakum, and cold caulking

24
Q

Are cast iron water service pipe designed for pressurized raw or potable water systems?

A

No

25
Q

What is an advantage of using Pyrex?

A

High corrosion resistance

26
Q

What attacks glass?

A

Hydrofluoric acids

27
Q

Glass is good up to what temperature?

A

450°F

28
Q

Is the expansion rate of glass less than steel?

A

Yes… The expansion rate is approximately one quarter than that of steel… Giving it good heat shock resistance

29
Q

Silicon iron is also known as?

A

Duriron

30
Q

What is added to duriron to increase its corrosion resistance?

A

Silicon

31
Q

Cast-iron pipe main difference from steel pipe is it has more what?

A

Carbon

32
Q

MJ, compression gasket, cold caulked, lead and oakum are what?

A

Joining methods for cast

33
Q

What does CSA stand for?

A

Canadian Standards Association

34
Q

What is glass pipe used for?

A

Laboratory waste lines

35
Q

The type of plastic that is soft when heated and hard when cooled is?

A

Thermoplastic

36
Q

The type of plastic where shape or form cannot be altered after installation is?

A

Thermoset

37
Q

What do you do with ABS cement when it gets old?

A

Dispose of in safe manner

38
Q

😉What type of plastic pipe is used for underground gas lines?

A

HD polyethylene

😉

39
Q

What does nesting refer to?

A

Storing small pipe in big pipe

40
Q

How do you check the temp of the plastic for fusion welding?
OMG… my ILM IS INCORRECT
Study this following answer…

A

Temp stick

OMG…. this is so wrong

41
Q

CPVC comes in what schedules?

A

40, 80, and 120

42
Q

What does OS and Y mean?

A

Outside screw and yoke

43
Q

High pressure valves use a?

A

Bolted bonnet

44
Q

Where are double flared fittings used in the automotive industry?

A

On high-pressure applications e.g. Brake lines

45
Q

After we review this material, I am going to do ______ on my midterm.

A

My best

PB1 Safety And Materials (4 decks)

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