Book 1: 5-15 - Piping Materials & Connections

Question 1

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

Answer 1

E. The piping can be easily assembled or disassembled

Question 2

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

Answer 2

B. Stock

Question 3

The diameter of commercial pipe is measured by its:

Select one:

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

Answer 3

A. Normal pipe size

Question 4

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

Answer 4

E. Cast iron

Question 5

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

Answer 5

A. Reamer

Question 6

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

Answer 6

154.1 mm

Question 7

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

Answer 7

B. Male pipe threads

Question 8

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

Select one:

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

Answer 8

A. Gas

Question 9

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

Answer 9

A. Coupling collar

Question 10

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

Answer 10

A. Low and moderate pressures

Question 11

One of the general types of pipe flanges used is the ______ flange.

Select one:

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

Answer 11

C. Lapped or slip-on

Question 12

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

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

Answer 12

D. Female fitting threads

Question 13

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

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

Answer 13

E. Higher pressure

Question 14

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

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

Answer 14

A. Corrosion

Question 15

Welded steel pipe made from flat steel plated that are rolled and welded is used for _______ service.
Select one

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

Answer 15

C. Lower pressure

Question 16

Cast steel is commonly used for:

Select one:

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

Answer 16

A. Pipe fittings and valves

Question 17

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. Gaskets are not required
C. There is no chance of leakages
D. A qualified welder must be used
E. The strength of the pipe is reduced

Answer 17

E. The strength of the pipe is reduced

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

Answer 18

D. The piping is easier to insulate

Question 19

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

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

Answer 19

C. 15.8 mm

Question 20

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

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

Answer 20

B. Ring Joint