NCCER CORE Power Tool Safety and Operation Questions and Answers

Question 1

A worker is operating a bench grinder to sharpen a chisel. According to OSHA standards, what is the maximum allowable gap between the work rest and the face of the grinding wheel?

Accepted Answer

1/8 inch

Answer

1/2 inch

Answer

1/4 inch

Answer

3/4 inch

Question 2

When operating a pneumatic nailer, which of the following actions is a critical safety practice that must be performed before attempting to clear a jam or perform any maintenance?

Accepted Answer

Disconnect the tool from the air supply

Answer

Engage the trigger lock

Answer

Increase the air pressure slightly

Answer

Point the tool towards the ground

Question 3

Which of the following is an unsafe practice when using an electric power tool with a cord?

Accepted Answer

Carrying the tool by its cord

Answer

Using a Ground Fault Circuit Interrupter (GFCI) protected outlet

Answer

Inspecting the cord for damage before each use

Answer

Ensuring the power switch is 'OFF' before plugging it in

Question 4

A construction worker is preparing to use a powder-actuated tool to fasten a steel track to a concrete wall. What is a fundamental safety rule specific to operating this type of tool?

Accepted Answer

The tool must be held firmly against the work surface and perpendicular to it.

Answer

The tool should only be loaded after it is pressed against the work surface.

Answer

A low-velocity charge should be tested first, even if a high-velocity charge is needed.

Answer

Hearing protection is optional if working in an open, well-ventilated area.

Question 5

A worker is using a circular saw to cut plywood. The blade guard is wedged open and does not spring back to cover the blade after a cut. What is the correct course of action?

Accepted Answer

Remove the saw from service immediately and tag it as 'Do Not Use'.

Answer

Continue using the saw carefully for the rest of the day and report it later.

Answer

Attempt to repair the spring mechanism on-site with available materials.

Answer

Ask a coworker to watch the blade and provide a verbal warning.

Question 6

To protect against electric shock, which safety device is required by OSHA when using portable electric tools on a construction site, especially in damp or wet locations?

Accepted Answer

A Ground-Fault Circuit Interrupter (GFCI)

Answer

A surge protector

Answer

A trigger lock

Answer

A heavy-duty extension cord