Struck-by and Caught-in/Between Hazards Flashcards

Under 1926.601(b)(4), a dump truck with an obstructed rear view may back up only when what condition is met?

Answer: It has a working reverse signal alarm audible above surrounding noise, or an observer signals that it is safe

Vehicles with an obstructed rear view need a reverse alarm audible above the surrounding noise, or an observer signaling that it is safe to back up.

During maintenance under a raised dump body, which control prevents the body from coming down by accident?

Answer: A positive means of support that is permanently attached and can be locked in place

1926.601(b)(10) requires dump bodies to have a permanently attached, lockable positive means of support to prevent accidental lowering during maintenance or inspection.

Under 1926.1424, what must an employer do about the swing radius of a crane's rotating superstructure?

Answer: Erect barriers, such as warning lines or railings, marking the hazard area

1926.1424(a)(2) requires barriers marking the swing radius hazard area so workers cannot be struck or crushed by the rotating superstructure.

What is the main purpose of a tag line on a crane load?

Answer: To control the load's rotation and swing without workers standing under or next to it

Tag lines let workers guide a suspended load from a safe distance, which lowers struck-by and caught-between exposure.

Under 1926.706, how large must the limited access zone be when a masonry wall is under construction?

Answer: The wall height plus 4 feet

The limited access zone must equal the height of the wall plus 4 feet and run the full length of the wall on the unscaffolded side.

Under OSHA's earthmoving rules, what must be done to heavy machinery or attachments that are being repaired?

Answer: Fully lower them or block them to prevent falling or shifting

1926.600(a)(3)(i) requires equipment or parts suspended by slings, hoists, or jacks to be substantially blocked or cribbed during repair.

When is a worker allowed under a load being handled by lifting or digging equipment in an excavation?

Answer: Never; workers must stay clear of loads handled by lifting or digging equipment

1926.651(e) prohibits employees from being underneath loads handled by lifting or digging equipment.