STSC Tool and Equipment Safety 3

Question 1

What is the primary hazard created by using a pneumatic nail gun with the contact-trip safety feature defeated or bypassed?

Accepted Answer

Unintentional nail discharge and double-fire events that cause penetrating injuries

Answer

Excessive noise levels that exceed OSHA's permissible exposure limits

Answer

Increased air pressure that causes irreparable damage to the tool

Answer

Air line disconnection resulting in a whipping hose hazard

Question 2

When should abrasive grinding wheels be inspected for cracks before use?

Accepted Answer

Before each use, using a ring test and visual inspection

Answer

Only during annual equipment audits conducted by a supervisor

Answer

Only after the wheel has completed eight hours of cumulative use

Answer

Whenever the site supervisor specifically requests an inspection

Question 3

Which class of portable fire extinguisher is appropriate for a fire involving energized electrical power tools?

Accepted Answer

Class C

Answer

Class A

Answer

Class B

Answer

Class D

Question 4

A construction worker uses a jackhammer for four continuous hours. What is the primary occupational health hazard from this exposure?

Accepted Answer

Hand-arm vibration syndrome (HAVS) affecting nerves and circulation

Answer

Chemical burns from hydraulic fluid or fuel contact

Answer

Eye strain caused by sustained concentration on the work area

Answer

Thermal burns from prolonged contact with the tool's heated surface

Question 5

What is the safe method for transferring a tool to another worker on a scaffold or elevated work platform?

Accepted Answer

Use a tool bag, bucket, or hand line to lower or pass tools safely

Answer

Verbally warn the worker below and drop the tool straight down

Answer

Toss the tool underhand with a clear verbal warning first

Answer

Signal the lower worker to move into position to catch the tool

Question 6

What action is required when a power tool's electrical cord shows signs of fraying, cracking, or insulation damage?

Accepted Answer

Tag the tool out, remove it from service, and have the cord repaired or replaced

Answer

Wrap the damaged section with electrical tape and resume work carefully

Answer

Limit usage time to reduce stress on the cord until a replacement arrives

Answer

Use the tool only in dry conditions until the cord can be formally assessed

Question 7

Under OSHA's construction standards, who is responsible for ensuring that all hand and power tools used by employees are safe and in good repair?

Accepted Answer

Both the employer and the employee share this responsibility

Answer

The individual employees using each tool

Answer

Only the tool manufacturer through warranty service

Answer

The general contractor's safety officer exclusively