NICET Level 2: Concrete Structure Construction and Drainage
Exam Review
What size lifts should be placed for bedding? - correct answer ✔✔6" lifts
When should backfill not be placed next to a structure? - correct answer ✔✔When structure hasn't
achieved 80% of it structural strength
Where does the elevation start on a footing? - correct answer ✔✔At the bottom
Each layer should be compacted to achieve what maximum density percentage? - correct answer
✔✔95%
What should be done to prep bedrock prior to placing footing? - correct answer ✔✔Grout should be
placed to fill any voids in bedrock.
How far away should stockpiled material be away from an open excavated hole? - correct answer
✔✔within 24"
What equipment is used to drive piles? - correct answer ✔✔1. Gravity Hammers
2. Open-end and closed end - diesel hammers
3. Air and steam hammers
4. hydraulic Hammers
What is the wave equation for driving piles? - correct answer ✔✔between 2 and 10 blows per inch
When pre-boring when should you stop? - correct answer ✔✔within 5 feet of estimated pile tip
When do you check pile alignment? - correct answer ✔✔before the last 5' of the pile is driven
, The axial alignment should be within how many inches of the longitudinal axis, when driving piles? -
correct answer ✔✔within 1/4" per foot
What timber piles should not be used? - correct answer ✔✔When checks cracks are wider than 1/2"
How many splices per pile is allowed? - correct answer ✔✔2 spices
What length of splice is not allowed? - correct answer ✔✔less than 10'
What length is allowed for non spliced piles? - correct answer ✔✔60'
When should precast piles be rejected? - correct answer ✔✔When cracks, spalls, or internal defects are
visible
What is spalling? - correct answer ✔✔Breakdown of concrete via natural weathering or chemical
reaction
What is concrete honey combing? - correct answer ✔✔Defect in concrete caused in insufficient
consolidation
What is concrete scaling? - correct answer ✔✔Flaking or peeling of hard concrete caused by freeze/thaw
how long should pre-cast piles be left in their forms? - correct answer ✔✔no less than 7 days
What is the dynamic load test? - correct answer ✔✔Method to assess a pile bearing capacity by applying
a load onto pile head
When does dynamic load test start? - correct answer ✔✔24 hours after pile has been driven
What are the requirements for the dynamic load test? - correct answer ✔✔Redrive pile for a maximum
of 3" and a maximum of 20 blows or refusal
Exam Review
What size lifts should be placed for bedding? - correct answer ✔✔6" lifts
When should backfill not be placed next to a structure? - correct answer ✔✔When structure hasn't
achieved 80% of it structural strength
Where does the elevation start on a footing? - correct answer ✔✔At the bottom
Each layer should be compacted to achieve what maximum density percentage? - correct answer
✔✔95%
What should be done to prep bedrock prior to placing footing? - correct answer ✔✔Grout should be
placed to fill any voids in bedrock.
How far away should stockpiled material be away from an open excavated hole? - correct answer
✔✔within 24"
What equipment is used to drive piles? - correct answer ✔✔1. Gravity Hammers
2. Open-end and closed end - diesel hammers
3. Air and steam hammers
4. hydraulic Hammers
What is the wave equation for driving piles? - correct answer ✔✔between 2 and 10 blows per inch
When pre-boring when should you stop? - correct answer ✔✔within 5 feet of estimated pile tip
When do you check pile alignment? - correct answer ✔✔before the last 5' of the pile is driven
, The axial alignment should be within how many inches of the longitudinal axis, when driving piles? -
correct answer ✔✔within 1/4" per foot
What timber piles should not be used? - correct answer ✔✔When checks cracks are wider than 1/2"
How many splices per pile is allowed? - correct answer ✔✔2 spices
What length of splice is not allowed? - correct answer ✔✔less than 10'
What length is allowed for non spliced piles? - correct answer ✔✔60'
When should precast piles be rejected? - correct answer ✔✔When cracks, spalls, or internal defects are
visible
What is spalling? - correct answer ✔✔Breakdown of concrete via natural weathering or chemical
reaction
What is concrete honey combing? - correct answer ✔✔Defect in concrete caused in insufficient
consolidation
What is concrete scaling? - correct answer ✔✔Flaking or peeling of hard concrete caused by freeze/thaw
how long should pre-cast piles be left in their forms? - correct answer ✔✔no less than 7 days
What is the dynamic load test? - correct answer ✔✔Method to assess a pile bearing capacity by applying
a load onto pile head
When does dynamic load test start? - correct answer ✔✔24 hours after pile has been driven
What are the requirements for the dynamic load test? - correct answer ✔✔Redrive pile for a maximum
of 3" and a maximum of 20 blows or refusal
