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Power Engineering 5th Class Book 1 > Book 1: 5-15 - Piping Materials & Connections > Flashcards

Book 1: 5-15 - Piping Materials & Connections Flashcards

1
Q

Joining or connecting lengths of piping by the use of threaded pipe and screwed connections has the advantage of:

Select one:

A. Gaskets are not required
B. The strength of the pipe is not reduced
C. A qualified welder must be used
D. There is no chance of leakage
E. The piping can be easily assembled or disassembled

A

E. The piping can be easily assembled or disassembled

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2
Q

The threads are cut by using a pipe die or die head, which is held in a frame called a:

Select one:

A. Ratchet
B. Stock
C. Reamer
D. Threader
E. Collet

A

B. Stock

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3
Q

The diameter of commercial pipe is measured by its:

Select one:

A. Nominal pipe size
B. Natural pipe size
C. Inside diameter
D. Wall thickness
E. Outside diameter

A

A. Normal pipe size

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4
Q

Threaded _____ pipe fittings cannot be used for gas service piping systems.

Select one:

A. Aluminum
B. Steel
C. Copper
D. Malleable iron
E. Cast iron

A

E. Cast iron

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5
Q

When pipe is with a wheel and roller cutter, a burr is left on the inside of the pipe that is removed with a pipe:

Select one:

A. Reamer
B. Threaded
C. Bender
D. Cleaner
E. Cutter

A

A. Reamer

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6
Q

For 152.40 mm (6 inch) nominal pipe size the inside diameter will be:

Select one:

A. 102.3 mm
B. 128.2 mm
C. 154.1 mm
D. 90.1 mm
E. 202.7 mm

A

154.1 mm

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7
Q

Before assembly the threads must be thoroughly cleaned and a small amount of thick lubricant, sometimes called pipe dope, is applied to the:

Select one:

A. Inside of the fitting
B. Male pipe threads
C. Inside of the pipe
D. Female threads
E. Both male and female threads

A

B. Male pipe threads

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8
Q

Threaded cast iron pipe fittings cannot be used for _____ service piping systems.

Select one:

A. Gas
B. Steam
C. Chemicals
D. Oil
E. Water

A

A. Gas

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9
Q

The grooved pipe system uses a joining connection made with a/an _____ that also serves as a union between the fitting and the piping.

Select one:

A. Coupling collar
B. Adaptor
C. Quick couple
D. Elbow
E. Flange fitting

A

A. Coupling collar

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10
Q

Joining or connecting lengths of piping by the use of threaded pipe and screwed connections is generally used for:

Select one:

A. Low and moderate pressures
B. Low and moderate temperatures
C. Moderate and high pressures
D. Low and high pressures
E. Moderate and high temperatures

A

A. Low and moderate pressures

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11
Q

Threaded _____ pipe fittings cannot be used for gas service piping systems.
Select one:

A. Copper

B. Cast iron

C. Steel

D. Aluminum

E. Malleable iron

A

B. Cast iron

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12
Q

When pipe is cut with a wheel and roller cutter, a burr is left on the inside of the pipe that is removed with a pipe:
Select one:

A. Cleaner

B. Cutter

C. Bender

D. Threader

E. Reamer

A

E. Reamer

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13
Q

No lubricant is used on the _____ because any excess lubricant is forced into the piping system.
Select one:

A. Both male pipe and female fitting threads

B. Inside of the pipe

C. Male pipe threads

D. Female fitting threads

E. Outside of the fitting

A

D. Female fitting threads

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14
Q

Joining or connecting lengths of piping by the use of threaded pipe and screwed connections has the advantage of:
Select one:

A. There is no chance of leakage

B. Gaskets are not required

C. The piping can be easily assembled or disassembled

D. A qualified welder must be used

E. The strength of the pipe is not reduced

A

C. The piping can be easily assembled or disassembled

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15
Q

The flange of the _____ face design has been found to be the most suitable for high pressure and is the easiest to disassemble.
Select one:

A. Male and female

B. O-Ring

C. Raised

D. Flat

E. Tongue and groove

A

C. Raised

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16
Q

Joining or connecting lengths of piping by the use of threaded pipe and screwed connections has the disadvantage of:
Select one:

A. Gaskets are not required

B. A qualified welder must be used

C. The piping can not be easily assembled or disassembled

D. There is no chance of leakage

E. The strength of the pipe is reduced

A

E. The strength of the pipe is reduced

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17
Q

One of the general designs of gaskets is the _____ gasket.
Select one:

A. Fat

B. Soft

C. Hard

D. Round

E. Ring joint

A

E. Ring joint

18
Q

For 21.3 mm (1/2 inch) nominal pipe size the inside diameter will be:
Select one:

A. 9.2 mm

B. 26.6 mm

C. 20.9 mm

D. 12.5 mm

E. 15.8 mm

A

E. 15.8 mm

19
Q

Cast iron has a high resistance to _____ and abrasion and is used for sewage and storm drainage lines.
Select one:

A. Vibration

B. Thermal expansion

C. Pressure

D. Corrosion

E. Temperature

A

D. Corrosion

20
Q

An advantage of plastic piping is:
Select one:

A. Ease of assembly

B. High cost

C. Ease of corrosion

D. Ease of corrosion

E. Resistance to high temperatures

A

A. Ease of assembly

21
Q

Seamless steel pipe is made from a solid billet of steel which is pierced and rolled is used for _____ service.
Select one:

A. Higher pressure

B. Steam

C. Lower pressure

D. Oil

E. Water

A

A. Higher pressure

22
Q

The diameter of commercial pipe is measured by its :
Select one:

A. Inside diameter

B. Wall thickness

C. Nominal pipe size

D. Outside diameter

E. Natural pipe size

A

C. Nominal pipe size

23
Q

Black steel piping cannot be used for _____ lines.
Select one:

A. Gas

B. Potable (drinking water) water

C. Instrument air

D. Lubricating oil

E. Fuel oil

A

B. Potable (drinking water) water

24
Q

For 152.40 mm (6 inch) nominal pipe size the inside diameter will be:
Select one:

A. 128.2 mm

B. 102.3 mm

C. 202.7 mm

D. 154.1 mm

E. 90.1 mm

A

D. 154.1 mm

25
Q

The use of welded joints for piping has the advantage over the use of screwed or flanged connections in that:
Select one:

A. The piping is easier to insulate

B. The cost of material is higher

C. The weight of the piping system is more

D. The need for maintenance is higher

E. The possibility of leakage is greatly increased

A

A. The piping is easier to insulate

26
Q

For 60.3 mm (2 inch) nominal pipe size the inside diameter will be:
Select one:

A. 40.9 mm

B. 35.1 mm

C. 52.5 mm

D. 62.7 mm

E. 77.9 mm

A

C. 52.5 mm

27
Q

A disadvantage of steel piping is its:
Select one:

A. High resistance to the corrosive effects of water

B. Low thermal expansion rate

C. Low strength to mass ratio

D. High thermal expansion rate

E. Low resistance to the corrosive effects of water

A

E. Low resistance to the corrosive effects of water

28
Q

Threaded cast iron pipe fittings cannot be used for _____ service piping systems.
Select one:

A. Chemicals

B. Gas

C. Water

D. Oil

E. Steam

A

B. Gas

29
Q

One of the general types of pipe flanges used is the _____ flange.
Select one:

A. Six bolt

B. Lapped or slip-on

C. Flat face

D. Raised face

E. Eight bolt

A

B. Lapped or slip-on

30
Q

Copper and copper alloys offer great resistance to:
Select one:

A. Creep

B. High pressure

C. Corrosion

D. Breakage

E. Thermal expansion

A

C. Corrosion

31
Q

Before assembly the threads must be thoroughly cleaned and a small amount of thick lubricant, sometimes called pipe dope, is applied to the:
Select one:

A. Inside of the pipe

B. Male pipe threads

C. Both male and female threads

D. Female threads

E. Inside of the fitting

A

B. Male pipe threads

32
Q

Welded steel pipe made from flat steel plates that are rolled and welded is used for _____ service.
Select one:

A. Higher pressure

B. Oil

C. Water

D. Steam

E. Lower pressure

A

E. Lower pressure

33
Q

The threads are cut by using a pipe die or die head, which is held in a frame called a:
Select one:

A. Ratchet

B. Stock

C. Reamer

D. Collet

E. Threader

A

B. Stock

34
Q

Joining or connecting lengths of piping by the use of threaded pipe and screwed connections is generally used for pipe sizes _____ and smaller for low and moderate pressures.
Select one:

A. 3 in

B. 3/4 in

C. 2 in

D. 1/2 in

E. 1 in

A

C. 2 in

35
Q

Gaskets used for higher pressures and temperatures are made from:
Select one:

A. Teflon (PTFE)

B. Cork

C. Metal or metal reinforced flexible graphite

D. Neoprene

E. Rubber

A

C. Metal or metal reinforced flexible graphite

36
Q

Joining or connecting lengths of piping by the use of threaded pipe and screwed connections is generally used for:
Select one:

A. Moderate and high pressures

B. Low and moderate temperatures

C. Low and moderate pressures

D. Low and high pressures

E. Moderate and high temperatures

A

C. Low and moderate pressures

37
Q

Cast steel is commonly used for:
Select one:

A. Water pipes

B. Gas pipes

C. Oil pipes

D. Pipe fittings and valves

E. Steam pipes

A

D. Pipe fittings and valves

38
Q

The grooved pipe system uses a joining connection made with a/an _____ that also serves as a union between the fitting and the piping.
Select one:

A. Quick couple

B. Coupling collar

C. Flange fitting

D. Elbow

E. Adaptor

A

B. Coupling collar

39
Q

The diameter of commercial pipe is measured by its :
Select one:

A. Nominal pipe size

B. Natural pipe size

C. Inside diameter

D. Wall thickness

E. Outside diameter

A

A. Nominal pipe size

40
Q

For 152.40 mm (6 inch) nominal pipe size the inside diameter will be:
Select one:

A. 202.7 mm

B. 90.1 mm

C. 128.2 mm

D. 102.3 mm

E. 154.1 mm

A

E. 154.1 mm

Power Engineering 5th Class Book 1 (25 decks)

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