Quiz 7

Question 1

The correct procedure to lift a heavy object is

Answer 1

Place back in an erect position and lift with leg muscles

Question 2

Screwdrivers are designed to be used as chisels without damage to the tool

Answer 2

False

Question 3

What classification or type of copper tubing is required in refrigeration and air conditioning applications

Answer 3

K and L

Question 4

Why is it necessary to seal the ends of copper tubing when it’s not in use

Answer 4

To keep out contaminants

Question 5

Name five methods used to join or connect copper tubing

Answer 5

Flare, swedge, constriction, manufactured fitting, pinch

Question 6

Why is it necessary to use regulators on oxygen and acetylene tanks

Answer 6

Safety and reduce tank pressure

Question 7

What is the term used to describe the drawing of solder into a close fitting joint

Answer 7

Capillary

Question 8

Oxygen is usually set to a higher delivery pressure than acetylene when operating a torch

Answer 8

True

Question 9

No danger will result when oxygen and oil are present under pressure

Answer 9

False

Question 10

How can copper oxide be eliminated from the inner walls of copper tubing joints when brazing

Answer 10

Purge with nitrogen

Question 11

What material is used to help soft solder “stick” to copper

Answer 11

Flux

Question 12

When would a flare connection be preferred to soldered connection

Answer 12

When easy disassembly is expected

Question 13

What is the approximate melting point (solidus) of 95/five solder

Answer 13

500 F

Question 14

What is the approximate melting point (solidus) of 15 silver braze

Answer 14

1200 F

Question 15

What is the content of 95/5 solder

95%_____
5% _____

Answer 15

95 Tin
5 Antimony

Question 16

What does the term swaging mean

Answer 16

Enlarge one size of tube to accommodate a similar size tube

Question 17

Name two types of tubing benders

Answer 17

Spring and mechanical

Question 18

Name five types of pliers used in the refrigeration industry

Answer 18

Needle, diagonal, lineman, slip joint, channel lock

Question 19

Name eight types of wrenches used in the refrigeration industry

Answer 19

Service wrench, adjustable, open end, box end, flare nut, pipe, socket, torque, allen

Question 20

Name an example of the type of tool that should not be used on a flare nut and why should it not be used and why

Answer 20

Pliers or pipe wrench because it causes round off