Hand tools test your knowledge
Misuse of tools indicates poor _____ skills.
mechanical
True or False? You should always pull on a wrench, rather than push.
True
Which hammer should be used for striking chisels?
ball pein
Why is ACR tubing dehydrated, filled with gas, and capped at both ends?
To prevent oxidation or contamination by dirt or other foreign matter.
Why is it important to remove burrs from cut ends of copper tubing?
They cause problems in assembly that could result in leakage.
Name six types of wrenches.
Any six of the following: open-end; box-end; combination; refrigeration service, fl are nut; adjustable; Allen; socket
Tools with plastic-dipped handles specifically do not protect against which type of hazard?
electrical shock
Do hacksaws cut on the forward stroke or the backward stroke?
forward
What gas is used to charge ACR copper tubing after it has been dehydrated?
nitrogen
What is the advantage of swaging over joining tubing with a fitting?
Swaging requires only one brazed joint (compared to two for a fi tting); so the potential for a leak is reduced.
The types of wrenches that tend to slip are _____ and _____.
open-end; adjustable
List six types of pliers
lineman’s; diagonal; pump; slipjoint ; adjustable; locking; longnose
True or False?
Twist drills can be used only on wood.
false
The two types of ACR copper tubing are _____ and _____.
hard-drawn; soft
The angle on flare fittings is _____ degrees.
45 degrees
What is the safest type of wrench to use on a stubborn nut or bolt? Why?
Use a box-end or socket wrench because these are less likely to slip than other wrenches.
Safety goggles are absolutely necessary when using pliers to cut _____ or _____.
wire or metal
Which basic types of snips has a serrated blade?
Aviation
ACR tubing is sized by its _____ diameter. Plumber's copper tubing is sized by nominal _____ diameter.
outside; inside
What piece of hardware holds flared tubing against a flare fitting?
flare nut
The most commonly used socket heads have _____ points.
6
Name at least three different types of screwhead patterns.
straight blade; Phillips/Frearson; Allen/Hex; Torx; Posidrive; clutchhead; Robertson
Since they are hit with a hammer, punches and cold chisels are called _____ tools.
struck
Name two methods for cutting copper tubing. Which method is preferred and why?
Tubing cutter and hacksaw. The tubing cutter is preferred because it makes clean, square cuts. Hacksaws produce tiny metal chips that may contaminate the refrigeration system, and it can be diffi cult to produce a precise 90° cut.
True or False? Flare fittings are intended for use only on hard-drawn copper tubing.
false