NCCER Module 4- Power Tools Questions and Correct Answers

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NCCER Module 4- Power Tools Questions
and Correct Answers

Question: Alternating Current (AC)
Answer: The common power supplied to most all wired devices, where the
current reverses its direction many times per second. AC power is the
type of power generated and distributed throughout settled areas.


Question: Auger Bit
Answer: A drill bit with a spiral cutting edge for boring holes in wood and
other materials.


Question: Carbide
Answer: A very hard material made of carbon and one or more heavy
metals. Commonly used in one type of saw blade.


Question: Chuck
Answer: A clamping device that holds an attachment; for example, the
chuck of the drill holds the drill bit.


Question: Chuck Key
Answer: A small, T-shaped steel piece used to open and close the chuck
on power drills.


Question: Countersink
Answer: A bit or drill used to set the head of a screw at or below the
surface of the material.


Question: Direct Current (DC)
Answer: An electric power supply where the current flows in one direction
only. DC power is supplied by batteries and by transformer-rectifiers that
change AC power to DC.

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Question: Forstner Bit
Answer: A bit designed for use in wood or similar soft material. The
design allows it to drill a flat-bottom blind hole in material.


Question: Ground Fault Circuit Interrupter (GFCI)
Answer: 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.


Question: Ground Fault Protection
Answer: Protection against short circuits; a safety device cuts power off
as soon as it senses any imbalance between incoming and outgoing
current.


Question: Masonry Bit
Answer: A drill bit with a carbide tip designed to penetrate materials such
as stone, brick, or concrete.


Question: Revolutions Per Minute (rpm)
Answer: The rotational speed of a motor or shaft, based on the number of
times it rotates each minute.


Question: Shank
Answer: The smooth part of a drill bit that fits into the chuck.


Question: Trigger Lock
Answer: A small lever, switch, or part that can be used to activate a
locking catch or spring to hold a power tool trigger in the operating mode
without finger pressure.


Question: Twist Bit
Answer: A bit used to drill wood and plastics at high speeds or to drill
metal at a lower speed.


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