Answers
Air Tank - ✔✔A pressure vessel containing air under pressure
Anti-Kickback Device - ✔✔An armature used during ripping operations that pushes down on the
wood after it has been pushed through the blade. A radial-arm saw cuts on the upstroke during
ripping, but on the downstroke during cross cut.
arc welding - ✔✔an electrical(opposed to gas) welding process accomplished by arcing a
current from the welding rod to the metal being welded
backguard - ✔✔in the case of high-lift industrial trucks, it refers to a guard over the side of the
platform nearest the mast frame truss. The guard is metal frame covered with expanded metal,
safety glass or its equivalent.
bench (verb) - ✔✔to make a berm or shoulder of earth
boastwains chair - ✔✔a seat supported by slings and attached to a rope so it can be raised and
lowered;carries only one person requires a safety belt
Boom Angle Indicator - ✔✔a device that measures and shows the angle of a crane or derricks
boom relative to horizontal
Boom Radius Indicator - ✔✔a device that measures and shows the distance from the center of
the hook to the center of rotation of a crane or derrick
Boomstop - ✔✔A device used to limit the angle of the boom at its highest position
, bullfloat - ✔✔a tool consisting of a flat paddle on a long pole, used to smooth wet concrete
carcinogen - ✔✔any substance that causes cancer
clamshell - ✔✔a shovel bucket with two jaws at that clamp together when lifted by a crane or
derrick;handles loose materials
dB - ✔✔decibel-a measure of the loudness or intensity of sound
dBA - ✔✔The decibel scale most commonly used in industrial applications. The "A" scale places
more emphasis on high-frequency sounds(which are most damaging to human hearing).
dead-man control - ✔✔a switch that automatically shuts off power when the operator's hands
are removed from equipment handles
earthwork - ✔✔excavating, moving, storing, placing, or working any type of earth material
Excavation - ✔✔a human made cavity or depression in the surface of the earth, including
sides,walls, or faces formed by excavated spoils. An excavation may become a trench if its
dimensions change
falsework - ✔✔temporary formwork and vertical shoring etc. used to support concrete and
placing operations for supported concrete slabs
fire extinusher. 10BC - ✔✔10lb of extinguishing agent for Type B (flammable liquids) and type C
(live electrical equipment) fires. Type A fires are in wood, cloth, or other carbon-based
materials. Type D (or star) fires are burning metals
fpm - ✔✔fet per minute