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. Nominal 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 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