Book1 chapter15

Question 1

An advantage of plastic piping is:
Select one:

A. Resistance to high temperatures
B. High cost
C. Ease of assembly
D. Ease of corrosion
E. Ease of corrosion

Answer 1

C. Ease of assembly

Question 2

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

A. Ring joint
B. Hard
C. Soft
D. Round
E. Fat

Answer 2

A. Ring joint

Question 3

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. Lower pressure
D. Water
E. Steam

Answer 3

C. Lower pressure

Question 4

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. Flat
B. Tongue and groove
C. Raised
D. O-Ring
E. Male and female

Answer 4

C. Raised

Question 5

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

A. Teflon (PTFE)
B. Rubber
C. Neoprene
D. Cork
E. Metal or metal reinforced flexible graphite

Answer 5

E. Metal or metal reinforced flexible graphite

Question 6

Cast steel is commonly used for:
Select one:

A. Pipe fittings and valves
B. Gas pipes
C. Oil pipes
D. Water pipes
E. Steam pipes

Answer 6

A. Pipe fittings and valves

Question 7

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

Answer 7

B. Low and moderate pressures

Question 8

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

A. 40.9 mm
B. 77.9 mm
C. 52.5 mm
D. 35.1 mm
E. 62.7 mm

Answer 8

C. 52.5 mm

Question 9

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

A. Thermal expansion
B. Corrosion
C. Temperature
D. Pressure
E. Vibration

Answer 9

B. Corrosion

Question 10

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

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

Answer 10

E. Cast iron

Question 11

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

A. Six bolt
B. Eight bolt
C. Raised face
D. Lapped or slip-on
E. Flat face

Answer 11

D. Lapped or slip-on

Question 12

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

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

Answer 12

A. The piping can be easily assembled or disassembled

Question 13

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. 2 in
B. 3/4 in
C. 1/2 in
D. 3 in
E. 1 in

Answer 13

A. 2 in

Question 14

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. Bender
B. Cutter
C. Cleaner
D. Reamer
E. Threader

Answer 14

D. Reamer

Question 15

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

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

Answer 15

D. Stock

Question 16

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

A. 15.8 mm
B. 26.6 mm
C. 12.5 mm
D. 20.9 mm
E. 9.2 mm

Answer 16

A. 15.8 mm

Question 17

A disadvantage of steel piping is its:
Select one:

A. Low thermal expansion rate
B. High thermal expansion rate
C. Low resistance to the corrosive effects of water
D. Low strength to mass ratio
E. High resistance to the corrosive effects of water

Answer 17

C. Low resistance to the corrosive effects of water

Question 18

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

A. The possibility of leakage is greatly increased
B. The need for maintenance is higher
C. The weight of the piping system is more
D. The cost of material is higher
E. The piping is easier to insulate

Answer 18

E. The piping is easier to insulate

Question 19

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

A. Water
B. Lower pressure
C. Oil
D. Higher pressure
E. Steam

Answer 19

D. Higher pressure

Question 20

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

A. Gas
B. Lubricating oil
C. Instrument air
D. Fuel oil
E. Potable (drinking water) water

Answer 20

E. Potable (drinking water) water

Question 21

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

A. Corrosion
B. Breakage
C. Thermal expansion
D. Creep
E. High pressure

Answer 21

A. Corrosion

Question 22

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

A.
A qualified welder must be used

B.
The strength of the pipe is reduced

C.
There is no chance of leakage

D.
The piping can not be easily assembled or disassembled

E.
Gaskets are not required

Answer 22

B.
The strength of the pipe is reduced

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 fitting

B.
Inside of the pipe

C.
Male pipe threads

D.
Female threads

E.
Both male and female threads

Answer 23

C.
Male pipe threads

Question 24

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

A.
Oil

B.
Chemicals

C.
Steam

D.
Water

E.
Gas

Answer 24

E.
Gas

Question 25

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

A.
154.1 mm

B.
202.7 mm

C.
102.3 mm

D.
128.2 mm

E.
90.1 mm

Answer 25

A.
154.1 mm

Question 26

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

A.
Inside diameter

B.
Outside diameter

C.
Nominal pipe size

D.
Natural pipe size

E.
Wall thickness

Answer 26

D.
Natural pipe size

Question 27

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.
Elbow

D.
Flange fitting

E.
Quick couple

Answer 27

A.
Coupling collar

Question 28

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

A.
Male pipe threads

B.
Inside of the pipe

C.
Female fitting threads

D.
Both male pipe and female fitting threads

E.
Outside of the fitting

Answer 28

C.
Female fitting threads