Substation Constructions Foundations Flashcards
When preparing an equipment foundation for a pour (concrete pad), frozen soil must be removed.
true
Aluminum conduit or other aluminum products should not be encased in concrete because aluminum will ? .
corrode
When pouring concrete for a structure foundation, the “tool” that should be used as an aid to ensure anchor bolts are located accurately is a ? .
template
All embedded items, anchor bolts, conduits, steel frames and pipe supports are installed after pouring the concrete.
false
A ? and/or leveling scope are both used to ensure that concrete forms are placed at the correct grade.
transit
If an anchor bolt is not in the exact required location, minor welding or bending of an anchor bolt is acceptable.
false
The concrete collection pit around the base of the substation main transformer is a requirement of ? .
EPA
An oil film is placed on the inside of concrete forms to reduce the risk of damaging the surface of the concrete piers and pads when the forms are pulled off.
true
To ensure rebar meets specifications, a person should check the ? .
rebar tags for suitable identification
A ? can be used on site to ensure that the concrete being delivered meets the required consistency.
slump test
Concrete should be vibrated ? .
until it becomes uniformly plastic
Upon completion of the concrete pour, recheck the ? for correct location and elevation.
anchor bolts
A tremie pipe should be used to pour concrete ? .
when concrete is to be dropped vertically more than 6’
A ? is required over freshly poured concrete to aid the curing process.
plastic sheet that acts as a vapor retarder
Forms are removed after concrete has set sufficiently, typically ? after a pour.
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