Question

a low-velocity fastening system that is used to drive steel pins or threaded studs into masonry and steel is a(n) _____.
options:
pneumatic screw nailer
powder-actuated tool
air impact wrench
mini hammer drill

Explanation:

A powder - actuated tool is a low - velocity fastening system that uses the energy from a controlled explosion (from a powder charge) to drive steel pins or threaded studs into masonry, steel, or other hard materials. A pneumatic screw nailer is mainly for driving nails/screws with air pressure, an air impact wrench is for tightening/loosening nuts/bolts, and a mini hammer drill is for drilling with hammering action, not for driving pins/studs into masonry/steel in the way a powder - actuated tool does.

Answer:

B. powder - actuated tool