ACI Tools, Equipment & Safety Procedures 3

Question 1

What is the primary function of a concrete edger tool?

Accepted Answer

Create a rounded, finished edge along forms

Answer

An edger is run along form edges to create a smooth, rounded profile that resists chipping when forms are stripped.

Question 2

Lockout/tagout (LOTO) procedures must be followed when:

Accepted Answer

Servicing or cleaning equipment with potential stored energy

Answer

LOTO is required before any servicing or maintenance to prevent unexpected energization of equipment.

Question 3

Which screed type uses mechanical vibration to consolidate concrete while striking it off to grade?

Accepted Answer

Vibratory screed

Answer

A vibratory screed combines a strike-off action with vibration to consolidate concrete and produce a uniform surface.

Question 4

What hazard is associated with operating power finishing equipment near electrical conduit embedded in a slab?

Accepted Answer

Electrocution if conduit is nicked and energized

Answer

Cutting into energized embedded conduit with metal trowel blades creates a serious electrocution hazard.

Question 5

A groover (jointing tool) is used to:

Accepted Answer

Create a weakened plane that controls crack location

Answer

A groover cuts a groove into fresh concrete to create a weakened plane where shrinkage cracks will occur in a controlled location.

(ACI) American Concrete Institute Concrete Finisher Practice Test