STRUCTURE CONSTRUCTION
AND DRAINAGE NEWEST
ACTUAL EXAM UPDATE 2026
QUESTIONWhat equipment is used to drive piles? - answer-1.
Gravity Hammers
2. Open-end and closed end - diesel hammers
3. Air and steam hammers
4. hydraulic Hammers
QUESTIONWhat is the wave equation for driving piles? - answer-
between 2 and 10 blows per inch
QUESTIONWhen pre-boring when should you stop? - answer-
within 5 feet of estimated pile tip
QUESTIONWhen do you check pile alignment? - answer-before
the last 5' of the pile is driven
QUESTIONThe axial alignment should be within how many
inches of the longitudinal axis, when driving piles? - answer-within
1/4" per foot
What size lifts should be placed for bedding? - answer-6" lifts
QUESTIONWhen should backfill not be placed next to a
structure? - answer-When structure hasn't achieved 80% of it
structural strength
, QUESTIONWhere does the elevation start on a footing? -
answer-At the bottom
QUESTIONEach layer should be compacted to achieve what
maximum density percentage? - answer-95%
QUESTIONWhat should be done to prep bedrock prior to placing
footing? - answer-Grout should be placed to fill any voids in
bedrock.
QUESTIONHow far away should stockpiled material be away
from an open excavated hole? - answer-within 24"
QUESTIONWhat timber piles should not be used? - answer-
When checks cracks are wider than 1/2"
QUESTIONHow many splices per pile is allowed? - answer-2
spices
QUESTIONWhat length of splice is not allowed? - answer-less
than 10'
QUESTIONWhat length is allowed for non spliced piles? -
answer-60'
QUESTIONWhen should precast piles be rejected? - answer-
When cracks, spalls, or internal defects are visible
QUESTIONWhat is spalling? - answer-Breakdown of concrete via
natural weathering or chemical reaction
QUESTIONWhat is concrete honey combing? - answer-Defect in
concrete caused in insufficient consolidation