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UNIT 5 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
5-1) What are the typical types of screws used on HVACR jobs?
5-2) How are the length and diameters of screws given?
5-3) List the common tip shapes found on sheet metal screws.
Pointed, Self-threading, Round tipped sheet metal screws, and Self-drilling
5-4) What is the difference between the way a self-threading and a self-drilling sheet
metal screw is used?
5-5) Why are rounded tipped sheet metal screws used?
5-6) What is a common use for self-starting sheet metal screws?
5-7) Why are flat-blade screwdrivers usually used manually to remove or install
slotted head screws?
5-8) List the common screw head designs.
5-9) What is a common use for wood screws and sheetrock screws in HVACR work?
5-10) Explain the significance of each part of this bolt specification: 2– * ¼– NC-
20 hex head
5-11) List three common types of nails.
5-12) What is the difference between a concrete fastener and a concrete anchor?
5-13) What drives a ballistic concrete nail in?
5-14) What is the term used to describe the enlarging of the end of a rivet?
5-15) What metals are commonly used to make pop rivets?
5-16) What is the best way of removing a pop rivet?
5-17) How does the tip of an installed duct staple differ from other types of staples?
5-18) Duct tape must meet what standard?
5-19) What is the problem with using vinyl or cloth duct tape in an attic?
5-20) What are two qualities that a good vinyl electrical tape must have?
5-21) List the three common types of adhesives used in HVACR work, and tell how
they are used.
5-22) Why is it better to use water-based adhesives as opposed to VOC-based solvent
adhesives?
5-23) Why must a tensioner tool be used on duct tie straps?
