REF UNITS 5 to 6 Flashcards
(5.6) What do reamers do?
they remove burs from cut piping.
(5.6) What is the name of the part that slips on to the flaring block to expand the pipe diameter?
slip-on yoke
(5.6) What tool is used to expand the end of soft-drawn copper tubing?
swaging tool
(5.8) What tool is used to cut sheet metal?
tin snips
(5.9) What tools are used to straighten the fins of evaporator and condenser coils?
fin straighteners
(5.9) What do refractometers do?
They retrofit a mineral oil system with POE oil
(5.10) What do velometers and anemometers do?
measure velocity of airflow.
(5.10) What do psychrometers measure?
wet and dry bulb temperatures (which is used to get humidity).
(6.1) How are nails sized?
in pennies (higher the penny number, the larger the nail).
(6.1) What is the difference between roofing nails, finishing nails, and common nails?
roofing nails have large heads, finishing nails have small heads, common nails have medium heads.
(6.2) What tool punches staples into wood?
a staple tacker.
(6.2) What are rivets for?
joining together 2 pieces of sheet metal
(6.2) What is the name of a rivet and pin together?
a mandrel
(6.3) How are wood screws specified?
by shank number (0 to 24) and length (in inches)
(6.3) What are sheet metal screws also known as?
tapping screws
(6.3) What does “5/16–18 UNC-2” represent for a machine screw?
5/16 inch outside thread diameter, 18 threads per inch, united national coarse, class of fit (wiggle room)
(6.3) what this?
that’s right
(6.4) What are toggle bolts for?
provide anchoring in hollow tile, building block, and gypsum board
(6.5) what does PAT stand for?
powder-actuated tool
(6.6) What does threaded rod and angle steel accomplish together?
they can custom hang things
(6.6) What clamps are used with threaded rod and angle steel?
beam clamps
(6.6) What is steel channel?
used in custom hanging things
(6.8) What are these?
retaining rings
(6.8) What are these?
hose clamps
