WorksheetsPedersen Machine Shop Safety Quiz - Basic; Non-obvious answers
Total questions: 80
Worksheet time: 40mins
What is the specific requirement for eye protection in the shop?
Standard prescription eyewear with glass lenses.
ANSI Z87.1 impact-rated safety glasses with side shields.
Face shield only (no glasses underneath).
Darkened welding lenses for all machines.
Which of the following is considered safe for operators with long hair?
Tucked inside a loose hoodie hood.
Tied back behind the head but loose at the ends.
Tied securely above the collar or inside a cap/hairnet.
Pinned behind the ears.
When operating rotating machinery, why are gloves prohibited?
They reduce tactile feedback (feel) of the material.
They can get caught and pull your hand into the machine.
They ruin the finish of the metal.
They cause the hands to sweat and slip.
Which footwear provides adequate protection in the machine shop?
Canvas slip-ons or boat shoes.
Leather or synthetic closed-toe shoes or boots.
Crocs or similar foam footwear.
Sandals.
If you see a classmate engaging in unsafe behavior, you should:
Ignore it to avoid conflict.
Wait until they are done, then tell the instructor.
Immediately yell or startle them to make them stop.
Calmly warn them or alert the instructor if there is immediate danger.
Why is using compressed air to clean chips off a machine dangerous?
It cools down the machine too fast.
It can blow chips into your eyes or drive them deep into machine ways/bearings.
It wastes shop air pressure.
It makes the floor wet.
If a machine guard is obstructing your view of the cut line, you should:
Remove the guard temporarily.
Bend the guard out of the way.
Stop and ask the instructor for a safer setup or adjustment.
Proceed carefully without looking directly at the blade.
When entering the "Safety Zone" of a machine operator:
Tap them on the shoulder to get their attention.
Stand directly behind them to see what they are doing.
Wait until they have turned off the machine or completely finished the cut.
Speak loudly so they can hear you over the noise.
The proper method for removing long, stringy metal chips (swarf) is:
Pulling them with pliers while the machine is running.
Using a brush or chip hook only after the machine has stopped.
Using heavy leather gloves to pull them away.
Using compressed air.
In the event of a power outage, what is the first thing you should do?
Turn off the machine's power switch so it doesn't restart unexpectedly.
Leave the room immediately.
Check the breaker box.
Wait for the lights to come back on.
Oily rags must be stored in a specialized red metal can because:
It keeps the shop smelling better.
They can spontaneously combust (catch fire) if piled in an open bin.
The oil can leak onto the floor.
It makes them easier to wash later.
If a machine makes an unusual sound or vibration:
Finish the cut quickly, then turn it off.
Apply more pressure to stabilize the part.
Turn it off immediately, lock it out, and report it.
Assume it is just a dull tool and continue.
The correct lifting technique involves:
Keeping the load far from your body to protect your clothes.
Twisting at the waist to move the object quickly.
Keeping the back straight, load close to the body, and lifting with the legs.
Lifting with your back muscles to spare your knees.
When carrying sharp tools, the cutting edge should be pointed:
Upward for visibility.
Outward to prevent cutting your clothes.
Downward and carried at your side.
Towards your body for protection.
Why is food/drink prohibited near machines (aside from cleanliness)?
It distracts the operator.
Chemicals/dust can contaminate the food, and spills create slip hazards.
It attracts bugs.
It violates health code violations.
If you are unsure about a setup, the worst action is to:
Ask a peer for a second opinion.
Consult the manual.
Proceed based on "common sense" or guesswork.
Re-read the assignment sheet.
Housekeeping is a safety issue because:
Cluttered floors cause trip hazards and metal chips cause cuts.
It affects the grade of the project.
It makes the tools last longer.
It looks professional.
Before leaving a machine, you must ensure:
The work is removed.
The machine has come to a complete dead stop and is cleaned.
The next person knows it is free.
The guard is taken off.
Fatigue and emotional stress are safety hazards because:
They lower your immune system.
They reduce reaction time and situational awareness.
They make you work too slowly.
They annoy other students.
Who has the authority to call "Stop" or hit an E-Stop in an emergency?
The instructor only.
The safety captain.
Anyone in the shop who sees immediate danger.
The machine operator only.
If the chuck key is left in the chuck when the drill press starts, it acts as a:
Flywheel, helping the drill spin.
High-velocity projectile.
Vibration dampener.
Locking mechanism.
When drilling a hole larger than 1/2 inch in metal, you should:
Run the drill at maximum RPM.
Pilot drill a smaller hole first.
Hold the material tighter with your hands.
Use a wood bit.
If a workpiece is not clamped and the bit grabs, the result is "helicoptering." This creates a hazard of:
Breaking the drill bit only.
Severe lacerations to hands or body impact.
Stripping the gears.
Overheating the motor.
The safest way to secure a small, irregular workpiece on a drill press is:
Holding it with pliers.
Use a drill press vise clamped to the table.
Wearing a leather glove to grip it.
Bracing it against the column with your hand.
Why should you ease up on the feed pressure as the bit breaks through the bottom of the material?
To prevent the drill chuck from falling off.
To prevent the material from grabbing and spinning up the bit.
To make the hole smaller.
To cool the bit down.
Long hair creates a specific hazard on the drill press because:
Static electricity attracts chips.
The rotating spindle creates a vacuum that can pull hair in.
It blocks your vision.
It can get caught in the belt guard.
Proper spindle speed (RPM) is determined by:
How much time you have to finish.
The material type and the diameter of the bit.
The height of the table.
The size of the motor.
If a drill bit catches and the workpiece spins out of control, you should:
Try to grab the workpiece to stop it.
Step back and hit the Emergency Stop immediately.
Increase the spindle speed.
Try to raise the quill handle.
Starting the drill with the bit already pressing against the metal will likely:
Create a cleaner start.
Break the bit or spin the workpiece.
Save time.
Dull the center punch mark.
The correct way to stop the drill press chuck is:
Allow it to coast to a stop naturally.
Apply light friction with a gloved hand on the chuck.
Grab the belt.
Drill into a piece of scrap wood to create friction.
Drilling into sheet metal requires:
Very high pressure.
Clamping the metal to a backing board to prevent deformation/spinning.
Holding it with your fingers.
A masonry bit.
Clearing long chips while the spindle is turning should be done with:
A blast of air.
A chip hook or brush, but only after stopping the machine is safer.
Your fingers.
A rag.
A squealing sound on the drill press usually indicates:
The belt is loose or the bit is dull/rubbing.
The machine is running efficiently.
The RPM is too low.
The material is too soft.
Why are rings and watches dangerous on a drill press?
They can scratch the paint.
They can conduct electricity.
They can be caught by the bit/chip, causing "degloving" or bone breaks.
They unbalance the operator.
Before adjusting the table height on a drill press, you must ensure:
The bit is removed.
The table locking clamp is loose, and you have a hand on the table to support the weight.
The motor is running.
The belt is removed.
What is the purpose of a "Backer Board" when drilling?
To keep the table clean.
To prevent "blowout" on the exit side and protect the drill press table.
To make the drill bit sharper.
To absorb vibration.
Using a dull drill bit is dangerous because:
It requires excessive force, which can cause the tool or work to slip.
It makes the hole too large.
It uses too much electricity.
It makes too much noise.
Where should the chuck key be stored when not in use?
In the chuck.
On the table.
In its specific holder or a magnetic tray attached to the machine.
In your pocket.
If the hole is deep, you should perform "peck drilling" (retracting the bit frequently) to:
Rest your arm.
Clear chips from the flutes and prevent binding/overheating.
Check the hole size.
Sharpen the bit.
When using a hole saw or large fly-cutter, the RPM should be:
Very high (2000+ RPM).
Very low (Slowed down significantly).
The same as a 1/8" drill bit.
Does not matter.
The "Margin of Safety" for your fingers on a bandsaw is:
1 inch.
4 inches.
Touching the guide.
6 inches.
The upper blade guide assembly on a bandsaw should be adjusted to be:
As high as possible for better visibility.
Approximately 1/4 inch (or the thickness of a pencil) above the stock.
Touching the stock lightly.
Locked in the center position.
To safely remove a small off-cut piece that is stuck near a moving bandsaw blade:
Use a flicking motion with your finger.
Use another piece of scrap wood (push stick) to slide it away.
Reach behind the blade to pull it.
Blow on it forcefully.
A rhythmic "ticking" or "clicking" sound on a bandsaw usually indicates:
A dull blade.
A cracked or kinked blade (weld failure imminent).
The blade is too tight.
The guide bearings are working.
Backing out of a long curved cut while the bandsaw is running is dangerous because:
It ruins the wood.
It can pull the blade off the wheels.
It dulls the blade teeth.
It speeds up the motor.
The primary purpose of safety glasses on a bandsaw is protection from:
Sawdust.
A snapped blade whipping out or flying debris.
Sparks.
Glare.
Forcing wood into the saw blade faster than it can cut results in:
A straighter cut.
Overheating the blade, wandering cuts, and potential blade breakage.
A polished edge.
Less dust.
Where is the danger zone for the ejection of a broken bandsaw blade?
To the right of the operator.
To the left of the operator.
Behind the operator.
Directly above.
Sawing cylindrical stock (round dowels) without a V-block is unsafe because:
The wood will burn.
The blade will spin the stock, causing loss of control.
It dulls the blade.
It makes an oval cut.
If the bandsaw blade breaks during a cut, your immediate reaction should be:
Open the wheel covers to investigate.
Step back, hit the E-stop, and wait for all motion to cease.
Try to pull the wood free.
Grab the loose blade.
Why must loose clothing be secured before using the bandsaw?
To prevent it from getting dirty.
To prevent it from being pulled into the blade or wheels.
To stop it from blocking the dust port.
To allow for better airflow.
"Relief cuts" are used on a bandsaw when:
Cutting thick wood.
Cutting tight curves to prevent blade twisting/binding.
Cutting very straight lines.
The blade is dull.
Why is placing your hands in line with a bandsaw cut dangerous?
It blocks your view.
If the wood slips or cuts easier than expected, your hand slips into the blade.
It creates a shadow.
It unbalances the table.
While operating the saw, your focus must be on:
The line being cut and your hand position relative to the blade.
The dust collection gauge.
The person waiting for the machine.
The blade tension knob.
Cleaning the bandsaw table of sawdust should only be done:
With a bare hand while running.
When the blade has come to a complete stop.
While the blade is coasting down.
With a blast of air while cutting.
Why is it dangerous to leave the bandsaw before the blade stops completely?
It wastes electricity.
A silent, coasting blade is a major hazard to the next person.
The blade will warp.
The tension will release.
Before turning on the saw, you should verify:
The blade is freely moving and not touching the wood.
The blade is buried in the wood.
The tension is set to zero.
The guides are removed.
Operating a bandsaw with a dull blade is dangerous because:
You have to apply excessive feed pressure, increasing slip risk.
It makes too much noise.
It makes the wood too smooth.
It creates finer dust.
A push stick is required when:
The wood is heavy.
Your hands would otherwise be within 3 to 4 inches of the blade.
You are cutting plywood.
The blade is new.
If the saw blade drifts (won't cut straight), you should:
Twist the wood hard to force it back to the line.
Stop the cut and adjust the setup/fence or replace the blade.
Increase the speed.
Tilt the table.
On a vertical disc sander, work must always be presented to:
The upward moving side of the disc.
The downward moving side of the disc.
The exact center of the disc.
The top edge.
Sanding on the upward-moving side of the disc will cause:
A smoother finish.
The workpiece to be lifted and thrown violently (Kickback).
The motor to stall.
The sandpaper to clog.
Why are safety glasses critical even though a sander doesn't create "chips"?
Fine dust and abrasive grit can detach at high speeds.
To prevent glare from the metal.
To see the grain better.
It is not critical if you squint.
Wearing gloves while using a belt sander is prohibited because:
Gloves provide too much grip.
The abrasive surface can grab the glove fabric and pull fingers into the pinch point.
Gloves melt instantly.
Gloves contaminate the wood.
The "Pinch Point" on a belt sander is located:
In the middle of the belt.
Where the belt meets the table or housing.
On the power cord.
Under the base.
When sanding small pieces that are hard to hold:
Use your fingertips.
Use a clamp or a holding jig to keep fingers away from the abrasive.
Decrease the speed of the sander.
Use the edge of the belt.
Friction sanding generates significant heat. This creates a hazard of:
Contact burns to the skin and fire risk for dust.
Making the wood brittle.
Freezing the bearings.
Dulling the abrasive instantly.
If the sanding belt tracks (moves) to one side, you should:
Push the wood against it to push it back.
Turn it off and adjust the tracking knob.
Use the other side of the belt.
Ignore it as long as it doesn't fly off.
Sanding painted wood or treated lumber is hazardous because:
It ruins the sandpaper.
The dust may contain lead or toxic chemicals that are inhaled.
It makes a screeching noise.
It melts the paint.
The gap between the table and the sanding disc/belt should be no more than:
1/16 to 1/8 inch.
1/2 inch.
1 inch.
It does not matter.
Cleaning a clogged sanding belt should be done with:
A scrap piece of steel.
A crepe rubber cleaning stick/block.
A wet rag.
A wire brush.
Where should you stand when operating the disc sander?
Directly in the "throw zone" of the dust.
Firmly on the floor, avoiding awkward leaning.
On a stool.
To the side of the machine, reaching across.
If you accidentally drop a piece of wood between the sander's table and the belt or disc:
Try to grab it before it falls.
Turn off the machine immediately and wait for a full stop before retrieving it.
Push it through with a pencil.
Leave it there.
Why shouldn't you sand plastic on a machine dedicated to wood?
Plastic melts, clogs the paper, and ruins it for wood sanding.
Plastic is too hard.
Plastic makes the machine spin too fast.
It creates static electricity only.
Sanding metal on a wood sander creates a fire hazard because:
Metal gets hotter than wood.
Sparks from the metal can ignite the sawdust accumulated inside the machine.
Metal tears the paper.
Metal is too heavy.
To avoid gouging the wood or burning the sandpaper:
Keep the wood stationary in one spot.
Move the wood back and forth across the abrasive surface.
Press as hard as possible.
Use the coarsest grit available.
If the sanding disc adhesive fails and the paper flaps:
Press the wood harder to stick it back down.
Stop immediately; the paper can slash skin or fly off.
Use glue while it is running.
Use the other side of the disc.
Dust collection/ventilation is mandatory because:
Wood dust can be damaging to your lungs.
It keeps the floor clean.
It cools the motor.
It reduces noise.
Never sand a workpiece that contains:
Knots.
Nails, screws, or staples.
Glue.
End grain.
When turning off the sander, you should:
Use a piece of scrap wood to act as a brake on the belt.
Stay at the machine until it has completely stopped spinning.
Unplug it immediately.
Walk away as soon as you hit the switch.
