CSLB Concrete C8 License Practice Test
#2
Why would the cylindrical/circular columns be chosen over the square/rectangular
columns? - ✔️✔️Circular columns carry more load.
Explanation:
For the given cross section area, circular columns carry more load as compared to
square/rectangular columns.
The size of the vibration needle to be used for concrete vibration for slab is
______________ inch. - ✔️✔️3/4" (20mm)
Explanation:
It is based on the thickness of the slab, generally 3/4" needle is used and in rare cases
1 1/2" needle is also used.
What are the compliance requirements that the concrete must meet to pass the
acceptance test? - ✔️✔️ALL OF THESE!
-Homogeneity
-Strength
-Workability
The minimum cementitious material that is required for concrete bridging deck is
______________lbs/cu yd. - ✔️✔️675
The amount of free water used in concrete shall not exceed ____________ pounds per
cubic yard of concrete. - ✔️✔️310
Explanation:
If the SCM are added, it can be increased to 20 pounds per each required 100 pounds
of cementitious material in excess of 550 pounds per cubic yard.
If the concrete curbs are to be constructed over the existing pavement,
_______________ are used to fix them to pavement. - ✔️✔️Steel dowels
Which of the following is NOT an example of blended cement? - ✔️✔️Combination of
silica fume and chlorine fluoride
Explanation:
, Blended cement is a combination of either Type || or Type V cement with any of the
SCM
Which of the following is a line at which the face of the curb meets the top of the
payment? - ✔️✔️Control Joint
Which of the following is NOT used as concrete chemicals? - ✔️✔️Abrasion bonding
compound
Explanation:
Concrete curing compound and polymer bonding agent are both concrete chemicals.
The admixtures that are used in concrete to improve durability in freeze/thaw
environments are ________________. - ✔️✔️Air entrainment admixtures
The fly ash which is used as SCM has the specific gravity ___________________. -
✔️✔️1.9 - 2.8
The leveling operation that removes lumps and hollows and provides a true and uniform
concrete surface is called ______________________. - ✔️✔️Screeding
If the quantity of concrete is less than _____________ cubic yards, the compliance test
reports are not required. - ✔️✔️50
Which type of Portland cement is used when early strength is expected? - ✔️✔️Type |||
Which of the following factor influence the positioning of the joints in a slab on grade? -
✔️✔️ALL OF THESE
-Sub grade conditions
-Finishing requirements
-Temperature
Which of the following is NOT a property of concrete? - ✔️✔️High tensile strength
The concrete work is done in freezing zones, it gets cured by ______________. -
✔️✔️Steam
Explanation:
It is done by heating concrete by steam or using alternating current, so that water
content in the concrete is not increased.
Coarse aggregate in concrete is the material that is retained in sieve number
____________. - ✔️✔️#4
#2
Why would the cylindrical/circular columns be chosen over the square/rectangular
columns? - ✔️✔️Circular columns carry more load.
Explanation:
For the given cross section area, circular columns carry more load as compared to
square/rectangular columns.
The size of the vibration needle to be used for concrete vibration for slab is
______________ inch. - ✔️✔️3/4" (20mm)
Explanation:
It is based on the thickness of the slab, generally 3/4" needle is used and in rare cases
1 1/2" needle is also used.
What are the compliance requirements that the concrete must meet to pass the
acceptance test? - ✔️✔️ALL OF THESE!
-Homogeneity
-Strength
-Workability
The minimum cementitious material that is required for concrete bridging deck is
______________lbs/cu yd. - ✔️✔️675
The amount of free water used in concrete shall not exceed ____________ pounds per
cubic yard of concrete. - ✔️✔️310
Explanation:
If the SCM are added, it can be increased to 20 pounds per each required 100 pounds
of cementitious material in excess of 550 pounds per cubic yard.
If the concrete curbs are to be constructed over the existing pavement,
_______________ are used to fix them to pavement. - ✔️✔️Steel dowels
Which of the following is NOT an example of blended cement? - ✔️✔️Combination of
silica fume and chlorine fluoride
Explanation:
, Blended cement is a combination of either Type || or Type V cement with any of the
SCM
Which of the following is a line at which the face of the curb meets the top of the
payment? - ✔️✔️Control Joint
Which of the following is NOT used as concrete chemicals? - ✔️✔️Abrasion bonding
compound
Explanation:
Concrete curing compound and polymer bonding agent are both concrete chemicals.
The admixtures that are used in concrete to improve durability in freeze/thaw
environments are ________________. - ✔️✔️Air entrainment admixtures
The fly ash which is used as SCM has the specific gravity ___________________. -
✔️✔️1.9 - 2.8
The leveling operation that removes lumps and hollows and provides a true and uniform
concrete surface is called ______________________. - ✔️✔️Screeding
If the quantity of concrete is less than _____________ cubic yards, the compliance test
reports are not required. - ✔️✔️50
Which type of Portland cement is used when early strength is expected? - ✔️✔️Type |||
Which of the following factor influence the positioning of the joints in a slab on grade? -
✔️✔️ALL OF THESE
-Sub grade conditions
-Finishing requirements
-Temperature
Which of the following is NOT a property of concrete? - ✔️✔️High tensile strength
The concrete work is done in freezing zones, it gets cured by ______________. -
✔️✔️Steam
Explanation:
It is done by heating concrete by steam or using alternating current, so that water
content in the concrete is not increased.
Coarse aggregate in concrete is the material that is retained in sieve number
____________. - ✔️✔️#4
