NCCER Power Tools questions & answers rated A+

NCCER Power ToolsA tool feature added for convenience that turned out to be very unsafe and should never be used is the... Trigger Lock. Before changing the blade or bit or doing any kind of repair... Unplug the Tool! Before plugging in tools with on/off switches... Turn it off! Most commonly used to make holes but with the right bit can be used as a sander, polisher, screwdriver, grinder, or countersink tool. Power Drill If you can't loosen the drill chuck by hand to remove the drill bit then you probably need a... (It is a small, T-shaped steel piece used to open and close the chuck on power drills) Chuck Key These tools do not activate the hammering function until pressure is applied to the bit. Hammer Drill When there is no electricity or high production is necessary then you need these kind of drills. Pneumatic Drills A tool for cutting that has an adjustable blade depth and two blade guards, one of which moves as you cut. Circular Saw The width of the saw blade should be on the wasted side of the cut. That's called the... Kerf Good for cutting intricate details or rounded cuts. Commonly called a Jigsaw Saber Saw A great saw for demolition. Often called a Sawzall. Reciprocating Saw This saw has a one-piece blade that runs in one direction around two guides. It is often used for cutting metal pipe. Band Saw A combination of a miter box and a circular saw Miter Saw This is used to grind away hard, heavy metal like welds. Angle Grinder Bits used to remove rough edges form the inside and outside of pipes or other objects. These operate at very high RPM and can catch on burrs. Burr Bits 1/8" between tool rest and wheel ¼" between wheel guard and wheel What tool are these numbers important for? Bench Grinder Slide the wheel onto a rod that fits the grinding wheel. Tap the wheel gently with a piece of wood or tool. It should ring clearly if it is in good condition. This test is called a... Ring Test These tools run on air and you should always read the owners manual before operating them so you know about all the special features and switches. Pneumatic Nailers These tools require special training and use actual gunpowder to fire nails through steel or concrete. Powder Actuated Tools Make sure you know what kind of pipes and electrical wires are buried in the ground before using these large demolition tools. Pavement Breakers: AKA Jackhammer Often referred to as a Porta-Power, this lever operated hydraulic tool is used to lift things up off the ground. Hydraulic Jack The common power supplied to most all wired devices, where the current reverses its direction many times/sec. Alternating current (AC) An electric power supply where the current flows in once direction only. DC power is supplied by batteries and by transformer-rectifiers that change AC power to DC. Direct current (DC) A bit or drill used to set the head of a screw at or below the surface of the material. Countersink A bit designed for use in wood or similar soft material. The design allows it to drill a flat-bottom blind hole in material. Forstner bit A drill bit with a carbide tip designed to penetrate materials such as stone, brick, or concrete. Masonry bit A drill bit with a spiral cutting edge for boring holes in wood and other materials. Auger bit A drill bit that used a lead screw to pull the larger rear portion of the bit into the wood, making it simple to drill larger holes. Self-feed bit A drill bit that includes steps which enable the user to cut holes in metal to a desired diameter. Step drill bit A clamping device that holds an attachment; for example, the chuck of the drill holds the drill bit. Chuck Describe one complete charge and discharge cycle for a rechargeable battery. Charge cycles A rating that describes the maximum amps a battery can provide continuously for up to 60 minutes. Amp hour (Ah) A measurement of the power the tool can deliver.