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NCCER Power Tools- Questions & Answers
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NCCER Power Tools- Questions & Answers
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NCCER Power Tools- Questions &Answers
A bit or drill used to set the head of a screw at or below the surface of the material. Correct
Ans-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. Correct Ans-Forstner bit
A drill bit with a carbide tip designed to penetrate materials such as stone, brick, or concrete.
Correct Ans-Masonry bit
A drill bit with a spiral cutting edge for boring holes in wood and other materials. Correct
Ans-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. Correct Ans-Self-feed bit
A drill bit that includes steps which enable the user to cut holes in metal to a desired diameter.
Correct Ans-Step drill bit
A clamping device that holds an attachment; for example, the chuck of the drill holds the drill
bit. Correct Ans-Chuck
, Describe one complete charge and discharge cycle for a rechargeable battery. Correct Ans-
Charge cycles
A rating that describes the maximum amps a battery can provide continuously for up to 60
minutes. Correct Ans-Amp hour (Ah)
A measurement of the power the tool can deliver. Correct Ans-Voltage rating
Protection against short circuits; a safety device cuts power off as soon as it senses any
imbalance between incoming and outgoing current. Correct Ans-Ground fault protection
A circuit breaker designed to protect people from electric shock and to protect equipment from
damage by interrupting the flow of electricity if a circuit fault occurs. Correct Ans-Ground
fault circuit interrupter (GFCI)
The smooth part of a drill bit that fits into the chuck. Correct Ans-Shank
The rotational speed of a motor or shaft, based on the number of times it rotates each minute.
Correct Ans-Revolutions per minute (rpm)
A very hard material made of tungsten carbide and heavy metals such as cobalt. Correct Ans-
Carbide
The turning force produced by the drill. Correct Ans-Torque
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