C2 - Power Tools Flashcards
The size of a Mitre saw is determined by the diameter of the blade size, which sizes of blade?
8” to 12”
A Mitre saw is mostly used for which cuts?
Cross cutting, compound mitres, ripping, rabbeting and dadoing plus many more.
Reciprocating saw blades move in which direction?
Back and forth
Jigsaw blades move in which direction?
Up and down.
What does Pneamatic mean?
Compressed air
Name the last kind of Router. There is Standard router, plunger router and
Light weight laminate trimmer, used for work with counter tops.
The size of the plane is based on the width of the blade, what is a common width?
3.25”
Angler grinders are most often used to do what tasks?
Smooth concrete surfaces, to cut off exposed rebar and bolts
What is the difference between a portable power tool and a stationary one?
Stationary are stationed in one area, portable tools are mobile.
What is a rotary hammer used for?
Drilling concrete and rock
What is a demolition hammer used for?
Punching holes into concrete and breaking concrete
True or false: Most powered wrenches are pneumatic?
True
What is a BELT sander used for?
Shaping and smoothing materials. They are more aggressive sanders and used when sanding lots of material is needed.
Advantages of a Coil Nailer compared to a Strip Nailer?
More nails, more compact, shoots round nails, aggressive toe nailing teeth.
Three major causes of injury when operating power tools are:
Lack of understanding how the tools workPoor job-planning skillsIncomplete knowledge of safety precautionsInadequate experience of how the tool performs.Unexpected eventsLack of attention
Most common Musculoskeletal Injuries are:
Tendinitis, Ganglion cysts, Bursitis, Carpal tunnel syndrome, Soft tissue injury, Thoracic outlet syndrome.
How to reduce vibration injuries?
Choose power tools that have anti-vibration controls and or handle coated with a material that suppresses vibration. Wear gloves designed to absorb or decrease vibration.Limit exposure to vibrating tools.
How can you minimize Electrical Hazards at a worksite?
1)Keep extension and power cords in good repair. 2)Keep power tools out of the rain. 3) Ensure tools are double-insulated or well grounded. 3) Use a power supply that’s protected by a ground-fault circuit interrupter (GFCI) 4) keep your feet dry when working with electric power tools in the rain.
What does a GFCI doe?
It trips the breaker when wet.
What is the purpose of grounding an electrical system?
To provide a direct path to the ground for electrical energy to follow if a fault occurs. (Without this, electrical energy could flow through the operator’s feet to the ground.)
How many amps is the maximum current rating for a circuit breaker supplying power to a regular 120-volt outlet.
15 AMPS
What is the formula for finding the amount of watts?
Volt x Amps = Watts
What type of Power tool does not need to be grounded?
Double insulated
What maintenance is required if there is excessive sparking at the brushes?
Brush replacement.
Why do you use heavy-gauge wires for extension cords?
To provide enough ampage.
When cutting a piece of wood with two finished sides, do you score the cut line first?
Yes
What type of Circular saw blade is the most common?
Carbide-tipped blades are the most common blade.
Ripping blade have more of a chisel-shaped tooth, True or False
True
What is a hook angle?
A hook angle is the angle formed between a radial line extending to the tip of the tooth and the gullet of the tooth.
What is the maximum RPM allowed for a Circular Saw?
6000 RPM
What is another name for the base plate on a Circular saw?
Shoe
What should the saw blade depth be set to?
1/4” deeper than the thickness of the wood being cut.
If a saw is vibrating, what do you do?
Nothing. Stop using it.
Is it safe to cut backward after making a plunge cut?
No
How is the size of a portable electric drill designated?
By the maximum diameter the drill chuck will accept.
What type of drill is suitable for use as an electric screw driver?
Drills with variance in speed and forward and reverse functions.
What is the difference between a hammer drill and a rotary hammer drill?
A rotary hammer can drill larger diameter holes, it hammers about 10 times harder and it has a hammer only mode.
Screws must be positioned at what angle to the face of the gypsum board?
Perpendicular.
An air compressor malfunctions from what problem most commonly?
Overheating. Prevention includes Regular lubrication, replacement of defective parts, and cleaning the air intake filter.
If the portable system feeding compressed air to a nailer or stapler does not contain a lubricator, what rule about lubrication should you follow?
2 to 3 drops of air tool every 2 hrs of operation, unless oil free design.
List the problems to look for when inspecting the air-supply hose to a portable power tool?
Fraying, kinks, leaks, dirt and corrosion in and around fittings.
How should you store the hose for a portable air supply system?
Both ends being connected.
What tool parts must be depressed before a nailer or stapler will set a fastener?
Work contracting element and element.
Before loading an air nailer, what two things must you be sure to do to the tool?
Disconnect air supply, ensure there is the correct nails.
Which stroke does the jigsaw normally cut on?
Upstroke
What is the purpose of a plastic shoe cover?
Protecting work piece from the vibration?
Should the good side of the workpiece be up or down-faced?
Down-faced
What is the advantage of an orbital action stroke?
More aggressive and quicker cuts.
how do you steer a jigsaw when cutting a curve?
Moving rear of saw opposite direction.
What are the advantages of a brushless motor?
Friction between the brushes and commutator is eliminated, as is the energy lost to sparking. Brushless tools have more run time and better torque than similar brush-type tools. Mechanical wear is less but electrical system is more complex.
What is the clutch system used for a battery-powered drill?
Preventing over-driving and breaking smaller diameter screws.
Why are DC currents not insulated?
There is only 12 volts.
When are the air and fuel filters of a portable generator inspected?
When replacing crank case oil.
How many watts of electrical energy can a heavy-duty generator provide?
2,000,000
