UNIT 6 Flashcards
As a safety precaution, what must the user ensure when using wire nuts to secure two or more wires? Pg____
Pg 147
Ensure that the connector completely covers the bare wires.
For fastening two pieces of rough lumber together the nail used would be _____.
Common nail
To fasten a duct hanger strap to a floor joist, the nail used would be a _____.
Roofing nail
The larger the number of the wood screw, the larger the _____ or gauge of the shank.
Diameter
True or false
Plastic toggle drywall anchors require constant tension on the anchor when tightening. Pg ____
False
How deep must the hole be drilled when installing lag shield anchors? Pg ____
139 -140 as deep as the length of the shield plus approximately 1/2 in.
Does a number 10 wood screw have a larger shank diameter than a number 20 wood screw? Show your calculations. Pg ______
No, the larger the number the larger the diameter
What type of coating is used on nails for corrosion protection?
Zinc or Resin pg 133
The pin of a hollow rivet is often called a ________. Pg ______
Mandrel
134 pg
What are four fasteners used to mount pipe and ductwork? Pg_____
Pipe hook
Threaded rod
Nylon strap
Pipe strap
Perferated strap
141-142pg
True or false
Self tapping screws do not need a pre-drilled hole to be installed. Pg 135
False
True or false
Stranded wire should not be directly connected under a screw terminal. Pg 146
True
Name three types of nails. Pg 133
Common
Masonry
Finishing
Roofing
When using stranded wire with ends that are not tinned, what direction is the wire placed under the screw so that when tightened, the strands are pulled under the screw?
Left side & spin clock wise
How is threaded rod attached to I-beams?
With beam clamps
What type of fastener would be used to keep a pulley from turning on a drive shaft?
Set screws
Power actuated fasteners require a power load. How are the different power loads marked to readily identify their level of power?
By color coordination
This type of fastener holds a component either onto a shaft or inside some type of housing.
Retaining rings
Name six types of set screw styles.
Flat point
Cone point
Oval point
Cup point
Dog point
Half dog point
What fasteners can be used on hollow walls?
Toggle bolts
Hollow wall anchor
Anchor shield
Plastic toggle
Name six styles of machine screw heads.
Oval head
Round head
Fillister head
Flat head
Pan head
Hexagon head
What is an outward clinch taker used for?
Used to fasten soft materials together and insulation around heat cooling pipes
The fastener for securing flexible duct to a sheet metal collar is the…………
Nylon strap
How are solderless terminals fastened to stranded wire?
Strip the end of the wire, and then insert into terminal and crimp
You want to mount an air handler from a ceiling truss. What material would you use?
Threaded rods, steel channel, and pipe clamps/beam clamps
True or false
Concrete fasteners do not require pre-drilled holes
False
The appropriate fastener for securing thermostat/low-voltage control wire is the…….
Staples
You need to secure three 2 x 10 beams together to make a larger support beam. What type of wood screw would you use?
Lag screws
True or false
A self drilling drywall anchor does not require a pre-drilled hole
True
What type of solderless terminal would you use if the securing nut cannot be completely removed?
Flanged tongue, spade tongue
What’s the difference between a pipe strap and perforated strapping material?
-Perforated straps has several holes and customizable
-Pipe straps are sized and mounted with two mount holes
The whole drilled in sheet metal for a tapping screw should be the approximate size of the……
Root diameter of the thread
