The ____________________ is used when a single line changes direction. (Fill in the blank)

The ____________________ is used when a single line changes direction.
 
  Fill in the blank(s) with the appropriate word(s).

Question 2

____________________ is the easiest type of pipe to install.
 
  Fill in the blank(s) with the appropriate word(s).

Question 3

Pipe made of copper is frequently referred to as ____________________.
 
  Fill in the blank(s) with the appropriate word(s).

Question 4

____________________ pipe is coated on the inside and outside with zinc.
 
  Fill in the blank(s) with the appropriate word(s).

Question 5

ID refers to the ____________________ diameter of a pipe.
 
  Fill in the blank(s) with the appropriate word(s).