chapter 4 power tools and equipment worksheet answers free sample

tools driven by compressed air, electricity, or pressurized liquid Shop equipment large shop tools such as floor jacks, parts cleaning tanks, and steam cleaners

Connected to the metal lines from the air compressor Allow the technician to take a source of air pressure to the vehicle being repaired Quick-disconnect connectors allow a technician to connect or disconnect hoses or tools without using a wrench

used to set a specific pressure in the system ( psi, or kPa) Filter traps water so that it can be drained daily Lubricator introduces oil into the airstream increases the life of air tools

Must be used with air wrenches Case hardened, thicker, and much stronger than conventional sockets and extensions Impact tools are flat black, instead of chrome Using a chrome tool on an impact wrench can be unsafe

__________are available in floor or table top models. The motor can usually be fitted with a variety of other tools such as meat grinder or a slicer/shredder, making it even more useful.It is also used to process moderate or large quantities of food to her uniform size, such as chopping onions or grinding bread for crumbs. The food is placed in a large bowl rotating beneath a hood, where curve blades chop it.

Employees using hand and power tools may be exposed to falling, flying, abrasive and splashing objects, flying dusts, fumes or mists, vapors or gases, and should be fitted with the appropriate PPE necessary to protect them from hazards.

All hand tool and portable power tools and similar equipment, whether furnished by Caltech or by or the employee, will be maintained regularly and kept in a safe working condition.

Hand tools are non-powered or operate only through physical exertion by hand. The greatest hazards posed by hand tools result from misuse and improper maintenance.

A portable tool is one that requires a power source to operate, such as electric, pneumatic, liquid fuel, hydraulic, explosive-actuated, and powder-actuated device or power supply. Power tools can be hazardous if used improperly.

Power tool general precautions include the following:Read the owner"s manual to understand the tool"s proper applications, limitations, operation, and hazards

Electric power tools will be either three-wire grounded or double-insulated and must be listed by Underwriters" Laboratories or another recognized listing agency.

Disconnect tools and ensure a zero-energy state when not in use, prior to servicing and cleaning, and when changing accessories such as blades, bits, and cutters.

Remove all damaged or defective portable electric tools from use and tag them: "Do Not Use." If not repairable, cut off power cord and discard/recycle.

Always plug cord-connected, hand-held electric tools into ground-fault circuit interrupter (GFCI)-protected receptacles or in compliance with the facility"s assured electrical grounding conductor program.

Hazardous moving parts of a power tool need to be safeguarded. For example, belts, gears, shafts, pulleys, sprockets, spindles, drums, fly wheels, chains, or other reciprocating, rotating, or moving parts of equipment shall be guarded if such parts are exposed to contact by employees.

Power tool guarding precautions include the following:Always consult supervisor when the manufacturer recommendations for guarding a specific power tool are not available or cannot be implemented.

Operate power tools only when all guards are in place and properly attached according to the manufacturer"s recommendations, and are functioning properly.

All hand-held power tools will be fitted with any one of the following safety switch methods as appropriate for the particular tool:A momentary contact "on-off" control.

A pressure switch which requires constant pressure to run and will shut off when the pressure is released, such as required for hand-held gasoline-powered chain saws.

Portable electric tools will be of the approved double-insulated type and used with an approved grounding device such as a GFI (Ground Fault Indicator) to prevent the unlikely event of an electrical shock.

Pneumatic tool precautions include the following:Pneumatic power tools will be secured to the hose or whip by some positive means such as a tool retainer to prevent the tool from becoming accidentally disconnected.

Safety clips or retainers will be securely installed and maintained on pneumatic impact (percussion) tools to prevent attachments from being accidentally expelled.

All pneumatically-driven nailers, staplers, and other similar tools provided with automatic fastener feeds which operate at more than 100 psi pressure to the tool will have a safety device on the muzzle end to prevent the tool from ejecting fasteners unless the muzzle is in contact with the work surface.

The fluid used in hydraulic powered tools will be fire-resistant and must retain its operating characteristics at the most extreme temperatures to which it will be exposed. The manufacturer"s safe operating pressures for hoses, valves, pipes, filters, and other fittings will not be exceeded.

Powder-actuated tools are also known as "explosive-actuated." Such tools are actuated by explosives or any similar means, and propel a stud, pin, fastener, or other object for the purpose of affixing it by penetration to any other object.

Fasteners will not be driven directly into materials such as brick or concrete closer than 3 inches from the unsupported edge or corner or into steel surfaces closer than ½ inches from the unsupported edge or corner, unless a special guard, fixture, or jig is used. (Exception: Low-velocity tools may drive no closer than 2 inches from an edge in concrete or ¼ inches in steel).

Tools used in the construction industry can cause hazards if they are used improperly or if they are in poor condition. You will be quizzed on tool categories, a safety component and tool inspection.

To learn more about tool safety, review the accompanying lesson called Working with Power Tools: Hazards & Controls. This lesson addresses the following:

Located in the beautiful and sunny Southern California, King Tools & Equipment, Inc. has been servicing the tool field for both the professional and D.I.Y market since 1981.