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UNIT 4 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
4-1) Why is it important for an HVACR technician’s tools to be clean and organized?
4-2) Describe some of the features available on service valve wrenches.
Some service valve wrenches use a ratchet mechanism. They may have a lever
4-3) What are the most common sizes of sockets?
4-4) Explain how socket handles are sized.
There are two dimensions used to refer to socket handles: length and size. The
4-5) When should a breaker-bar socket wrench handle be used?
4-6) Why is it important that the same force be used when tightening nuts and bolts
on compressors?
4-7) What is a good practice to follow when tightening bolts with a torque wrench?
4-8) How does a flare-nut wrench differ from a box wrench?
4-9) Explain the technique that should be used when using an adjustable wrench.
4-10) How does the tubing cutter cut?
4-11) What is a deburring tool used for?
4-12) Can you sometimes use a screwdriver as a chisel and pound it with a hammer?
4-13) Should pliers be used to tighten or loosen brass fittings? Why or why not?
4-14) Why are tubing brushes used?
4-15) List some of the safety precautions to be observed when using power tools.
Never operate any power equipment unless you are completely familiar with
4-16) What is the proper way to hold a hammer?
4-17) What two sizes of pipe wrenches are recommended for refrigeration installation
and service work?
4-18) What type of wrench should typically be used on the screws on fan pulleys and
fan blade hubs?
4-19) When would a nut driver typically be used?
4-20) What types of pliers are primarily used for mechanical HVACR work?
4-21) Electrical pliers should only be used for cutting what material?
4-22) How is cutting accomplished when using a hacksaw?
4-23) How are files and vises used in refrigeration work?
4-24) What are hand seamers, and when are they used?
4-25) What are the three different types of aviation snips?
4-26) How does a nibbler work?
