Unit 7- Tubing And Piping

Question 1

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

Answer 1

Outside diameter

Question 2

The maximum temperature at which soft soldering is done is

Answer 2

842 *F

Question 3

Brazing is done at _______ soldering

Answer 3

Higher temperatures than

Question 4

When soldering or brazing, the solder is

Answer 4

Melted by heat from the tubing and fitting

Question 5

Filler materials used in the high temperature connection of copper joints are composed of

Answer 5

15%-60% silver

Question 6

Molten solder flows between the 2 base metals being soldered because

Answer 6

Of capillary attraction

Question 7

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

Answer 7

Neutral flame

Question 8

When soldering why should flux be used?

Answer 8

Helps prevent oxidation
Helps keep pipes clean
Helps solder flow easy

Question 9

When soldering, flux should be applied to

Answer 9

The male part of the joint only

Question 10

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

Answer 10

Sand cloth

Question 11

Pipe treads are standardized by the ANS. ANS stands for

Answer 11

American National Standard

Question 12

Pipe threads, when used on pipes that will contain liquid or vapor under pressure,

Answer 12

Generally have a V shape

Question 13

When joining a steel pipe, a ______ should be applied to the threads before connecting.

Answer 13

Pipe dope

Question 14

T or F: k type copper is heavy duty with a thick tubing wall.

Answer 14

True

Question 15

T or F: L-type copper is considered medium weight and is used most frequently.

Answer 15

True

Question 16

T or F : M is a lightweight copper and is not commonly used in our industry.

Answer 16

True