Exam 7: Tubing and Piping

When making a swage joint, what should the depth of the enlarged portion of the tube be?

When soldering, flux should be applied to ____.

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

In the thread specification 1/2-14 NPT, the NPT stands for ____________________.

Why should some refrigerant lines be insulated?

The proper type of flame from an oxyacetylene torch for silver brazing is ____.

When installing a refrigeration system, the piping should be connected with as few joints as possible.

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

For cleaning ACR copper tubing before soldering, a material that can be used is ____.

When soldering, why should flux be used?

When soldering, by what force, the molten filler material flows between the two base metals ?

If a technician needed 5/8" ACR for an installation and was located near only a plumbing supply house, what size and type of pipe should he ask for?

Pipe threads are standardized by the A.N.S. A.N.S. stands for ____.

Pipe threads, when used on pipe that will contain liquid or vapor under pressure, ____.

The tubing or pipe for natural gas supply to a gas heating unit is ____________________.

The type of steel pipe thread used primarily in this industry is the "tapered" thread. Why?

The use of flux is always required when soldering or brazing.

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

One reason for insulation on a suction line is to help maintain the proper ____________________.