Grinder and Multi-Tool Assessment

Which of the following is a recommended safety measure when using a grinder?

• Wear loose clothing and jewelry

• Wear gloves while operating the grinder

• Use the grinder on wet surfaces

• None of the above

Answer explanation

Due to its high level of operational RPMs, it is recommended that you take all possible pre cautions before use. Including the followng:

Eye Protection

Hard Hat

Gloves

Grinder Gaurd

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

It is safe to talk to someone while operating the grinder

• True

• False

2. When operating the portable disc grinder, the grinding disk should be positioned so that the sparks and grit are thrown.

• A. Down to avoid hitting others.

• B. Away from the Operator.

• C. Away from the operator and others in the work area.

• D. Up to avoid hitting others

What type of wheel is typically used for grinding metal?

• Diamond

• Aluminum oxide

• Silicon carbide

• Ceramic

Answer explanation

Fun Fact:

Most saw blades will include a carbide coating for even greater durability.

Carbide: A very hard material made of tungsten carbide and heavy metals such as cobalt. Commonly baked on to the tips of masonry bits and to the edges of saw blades.

6. What can the operator expect to happen when the wire brush attachment is used on the portable disc grinder?

• A. The grinder performs well.

• B. The grinder stays steady on the material being bushed.

• C. The grinder moves back and forth.

• D. The grinder may be jumped out or be thrown out.

It is safe to force a piece of scrap metal into the wheel to stop it

• True

• False

Which type of grinder is best suited for heavy-duty grinding tasks?

• Angle grinder

• Bench grinder

• Die grinder

• Surface grinder

Answer explanation

Due to the amount of high and consistent torque, the bench grinder is well suited for many heavy duty applications.

Torque: The turning force produced by the drill. As the bit’s turning speed increases, torque decreases, and vice versa.Whip check: A safety attachment used to prevent whiplashing in hoses when they are inadvertently uncoupled.

Which of the following is a proper way to use a multi-tool?

• Hold it with one hand while operating it

• Use it to pry open objects

• Use it for cutting tasks only

• Use both hands to operate it

Which of the following is a proper safety measure when using a multi-tool?

• Use it in wet environments

• Hold it with one hand while operating it

• Use the proper blade for the task

• Wear loose clothing and jewelry

What should you do if you encounter a problem with a grinder or multi-tool while using it?

• Ignore the problem and continue working

• Try to fix the problem yourself

• Stop using the tool and notify your supervisor

• Ask a coworker for help

Answer explanation

For corded power tools such as angle grinders and multi-tools, pro longed operation can trip safety measures on most standard 110v GFI (Ground Fault Protection)

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