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NCCER Concrete Construction|
Certification Exam 2025| Questions and
Answers (Multiple Choice)
Which tool is best for striking off excess concrete to level it with the top of the form?
A) Trowel
B) Bull float
C) Screed
D) Edger
C) Screed
Because a screed is long and straight, it’s used to level freshly placed concrete by dragging it
across the top surface. A bull float smooths, but doesn’t level.
Freshly placed concrete should be compacted mainly to:
A) Make it dry faster
B) Avoid cracking during curing
C) Eliminate air pockets
D) Improve the color
C) Eliminate air pockets
You vibrate concrete to push out trapped air. Too many air pockets = weak concrete.
A transit level is most useful for:
A) Measuring slope on forms
B) Checking concrete temperature
C) Estimating water-to-cement ratio
D) Cleaning rebar
, 2
A) Measuring slope on forms
You’d use a transit level to make sure your forms have the right pitch for water drainage.
If you're using a power trowel too early on the slab:
A) You’ll get a polished finish
B) It can tear the surface
C) It cures the slab quicker
D) No effect at all
B) It can tear the surface
Using a power trowel too soon can mess up the surface before it’s ready—too wet and soft.
A slump test is used to check:
A) Drying time
B) Strength after curing
C) Mix ratio of cement and water
D) Workability of the mix
D) Workability of the mix
The slump tells you how easy the concrete is to pour and spread. High slump = more flowy.
Which rebar size is biggest?
A) #4
B) #5
C) #6
D) #3
C) #6
The higher the number, the thicker the bar. So #6 is thicker than all the others listed.
NCCER Concrete Construction|
Certification Exam 2025| Questions and
Answers (Multiple Choice)
Which tool is best for striking off excess concrete to level it with the top of the form?
A) Trowel
B) Bull float
C) Screed
D) Edger
C) Screed
Because a screed is long and straight, it’s used to level freshly placed concrete by dragging it
across the top surface. A bull float smooths, but doesn’t level.
Freshly placed concrete should be compacted mainly to:
A) Make it dry faster
B) Avoid cracking during curing
C) Eliminate air pockets
D) Improve the color
C) Eliminate air pockets
You vibrate concrete to push out trapped air. Too many air pockets = weak concrete.
A transit level is most useful for:
A) Measuring slope on forms
B) Checking concrete temperature
C) Estimating water-to-cement ratio
D) Cleaning rebar
, 2
A) Measuring slope on forms
You’d use a transit level to make sure your forms have the right pitch for water drainage.
If you're using a power trowel too early on the slab:
A) You’ll get a polished finish
B) It can tear the surface
C) It cures the slab quicker
D) No effect at all
B) It can tear the surface
Using a power trowel too soon can mess up the surface before it’s ready—too wet and soft.
A slump test is used to check:
A) Drying time
B) Strength after curing
C) Mix ratio of cement and water
D) Workability of the mix
D) Workability of the mix
The slump tells you how easy the concrete is to pour and spread. High slump = more flowy.
Which rebar size is biggest?
A) #4
B) #5
C) #6
D) #3
C) #6
The higher the number, the thicker the bar. So #6 is thicker than all the others listed.
