ACR-103 Midterm

The size indicated for the diameter of copper tubing used for plumbing is the ___.

• inside diameter

• outside diameter

• wall thickness

• None of the above.

The size indicated for the diameter of ACR copper tubing is the ___.

• inside diameter

• outside diameter

• wall thickness

• None of the above.

The maximum temperature at which soft soldering is done is ___.

• 212°F

• 400°F

• 600°F

• 842°F

Brazing is done at ___ soldering.

• the same temperature as

• lower temperatures than

• higher temperatures than

• temperatures that can be higher or lower than

When soldering or brazing, the solder is ____.

• heated directly by the flame of the heat source

• heated by the surrounding air

• used to oxidize the metal

• melted by heat from the tubing and fitting

Molten solder flows between the two base metals being soldered because ____.

• the atmospheric pressure pushes it in

• of capillary attraction

• there are no surface pores in the base metal

• the tubing surface melts and the pressure differential forces it in

K-type copper is heavy-duty with a thick tubing wall.

• True

• False

L-type copper is considered medium weight and is used most frequently.

• True

• False

M is a lightweight copper and is not commonly used in our industry.

• True

• False

When tubing is cut with a tubing cutter, a burr is produced in the process. This slight decrease in the inside diameter of the tube can adversely affect the operation of the system.

• True

• False