Book 1: Chapter 15 Piping Materials & Connections

Question 1

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

A. Thermal expansion

B. Breakage

C. Corrosion

D. High pressure

E. Creep

Answer 1

C. Corrosion

Question 2

A disadvantage of steel piping is its:
Select one:

A. Low thermal expansion rate

B. High thermal expansion rate

C. Low strength to mass ratio

D. Low resistance to the corrosive effects of water

E. High resistance to the corrosive effects of water

Answer 2

D. Low resistance to the corrosive effects of water

Question 3

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

A. Lapped or slip-on

B. Raised face

C. Six bolt

D. Eight bolt

E. Flat face

Answer 3

A. Lapped or slip-on

Question 4

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

A. 90.1 mm

B. 202.7 mm

C. 128.2 mm

D. 102.3 mm

E. 154.1 mm

Answer 4

E. 154.1 mm

Question 5

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

A. Fat

B. Soft

C. Hard

D. Ring joint

E. Round

Answer 5

D. Ring joint

Question 6

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

A. Collet

B. Ratchet

C. Reamer

D. Threader

E. Stock

Answer 6

E. Stock

Question 7

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. Raised

B. O-Ring

C. Male and female

D. Tongue and groove

E. Flat

Answer 7

A. Raised

Question 8

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

A. Malleable iron

B. Aluminum

C. Copper

D. Cast iron

E. Steel

Answer 8

D. Cast iron

Question 9

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

A. Oil

B. Steam

C. Gas

D. Water

E. Chemicals

Answer 9

C. Gas

Question 10

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

A. Cork

B. Teflon (PTFE)

C. Metal or metal reinforced flexible graphite

D. Neoprene

E. Rubber

Answer 10

C. Metal or metal reinforced flexible graphite

Question 11

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

A. 77.9 mm

B. 62.7 mm

C. 40.9 mm

D. 35.1 mm

E. 52.5 mm

Answer 11

E. 52.5 mm

Question 12

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

A. Potable (drinking water) water

B. Lubricating oil

C. Instrument air

D. Fuel oil

E. Gas

Answer 12

A. Potable (drinking water) water

Question 13

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

A. Wall thickness

B. Natural pipe size

C. Inside diameter

D. Nominal pipe size

E. Outside diameter

Answer 13

D. Nominal pipe size

Question 14

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

A. A qualified welder must be used

B. The piping can be easily assembled or disassembled

C. There is no chance of leakage

D. Gaskets are not required

E. The strength of the pipe is not reduced

Answer 14

B. The piping can be easily assembled or disassembled

Question 15

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. Elbow

C. Coupling collar

D. Flange fitting

E. Adaptor

Answer 15

C. Coupling collar

Question 16

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

A. Oil

B. Higher pressure

C. Steam

D. Water

E. Lower pressure

Answer 16

B. Higher pressure

Question 17

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

A. The need for maintenance is higher

B. The possibility of leakage is greatly increased

C. The piping is easier to insulate

D. The cost of material is higher

E. The weight of the piping system is more

Answer 17

C. The piping is easier to insulate

Question 18

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. Threader

B. Bender

C. Cutter

D. Reamer

E. Cleaner

Answer 18

D. Reamer

Question 19

Cast steel is commonly used for:
Select one:

A. Pipe fittings and valves

B. Water pipes

C. Gas pipes

D. Steam pipes

E. Oil pipes

Answer 19

A. Pipe fittings and valves

Question 20

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. 1 in

B. 3 in

C. 3/4 in

D. 2 in

E. 1/2 in

Answer 20

D. 2 in

Question 21

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

A. Vibration

B. Pressure

C. Thermal expansion

D. Corrosion

E. Temperature

Answer 21

D. Corrosion

Question 22

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 temperatures

B. Low and moderate pressures

C. Low and high pressures

D. Moderate and high pressures

E. Low and moderate temperatures

Answer 22

B. Low and moderate pressures

Question 23

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. Female threads

C. Inside of the fitting

D. Male pipe threads

E. Both male and female threads

Answer 23

D. Male pipe threads

Question 24

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

A. 26.6 mm

B. 20.9 mm

C. 9.2 mm

D. 12.5 mm

E. 15.8 mm

Answer 24

E. 15.8 mm

Question 25

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

A. The piping can not be easily assembled or disassembled

B. A qualified welder must be used

C. The strength of the pipe is reduced

D. Gaskets are not required

E. There is no chance of leakage

Answer 25

C. The strength of the pipe is reduced

Question 26

An advantage of plastic piping is:
Select one:

A. High cost

B. Ease of corrosion

C. Resistance to high temperatures

D. Ease of assembly

E. Ease of corrosion

Answer 26

D. Ease of assembly

Question 27

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

A. Inside of the pipe

B. Outside of the fitting

C. Both male pipe and female fitting threads

D. Female fitting threads

E. Male pipe threads

Answer 27

D. Female fitting threads

Question 28

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

A. Metal or metal reinforced flexible graphite

B. Neoprene

C. Cork

D. Rubber

E. Teflon (PTFE)

Answer 28

A. Metal or metal reinforced flexible graphite

Question 29

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

A. Higher pressure

B. Water

C. Lower pressure

D. Steam

E. Oil

Answer 29

C. Lower pressure

Question 30

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

A. Oil

B. Water

C. Steam

D. Chemicals

E. Gas

Answer 30

E. Gas