Plumbing Pipe Systems & Materials 2

Question 1

What is the nominal pipe size (NPS) measurement based on?

Accepted Answer

Approximate inner diameter

Answer

Exact outer diameter

Answer

Wall thickness

Answer

Flow rate capacity

Question 2

Which pipe material is best suited for underground sewer lines due to its chemical resistance?

Accepted Answer

Schedule 40 PVC

Answer

Copper

Answer

PEX

Answer

Galvanized steel

Question 3

What does 'Schedule' refer to in pipe specifications (e.g., Schedule 40)?

Accepted Answer

The pipe's wall thickness

Answer

The pipe's installation timeline

Answer

The pipe's pressure rating

Answer

The pipe's diameter

Question 4

Which type of copper pipe has the thinnest wall and is used for interior supply lines?

Accepted Answer

Type M

Answer

Type K

Answer

Type L

Answer

Type DWV

Question 5

What is the purpose of a dielectric union?

Accepted Answer

To prevent galvanic corrosion between dissimilar metals

Answer

To allow pipe expansion

Answer

To reduce pipe diameter

Answer

To allow pipe rotation

Question 6

What is the maximum operating temperature for standard PVC pipe?

Accepted Answer

140°F

Answer

60°F

Answer

100°F

Answer

180°F