CSLB CONCRETE C8 LICENSE EXAM,
PRACTICE EXAM AND STUDY GUIDE EXAM
2024 WITH ACTUAL CORRECT QUESTIONS
AND VERIFIED DETAILED ANSWERS
|FREQUENTLY TESTED QUESTIONS AND
SOLUTIONS |ALREADY GRADED A+|BRAND
NEW!!|GUARANTEED ASS |LATEST UPDATE
Which of the following are the recommended dry stone (aggregate) sizes commonly used in the
formation of concrete?
½" to ¾"
What are the standard sizes of column-base footings that form the foundation system of a concrete
building?
4.5 to 12 square feet
What is the recommended depth of TROWELING around the form-edges for better edge finishing of the
concrete once the concrete surface has dulled substantially?
About 1 inch
Which of the following admixtures are commonly added to concrete to achieve better performance and
quality of concrete?
ALL
-Retarding admixture
-Water reducing admixture
-Air entertaining admixture
Why are vapor or moisture barriers used in concrete construction?
To avoid flow - in of water moisture
1|Page
,Which of the following factors can cause the greater cracks in the concrete?
ALL
-
Improper watering, High temperature, Premature loading
-Rapid loading, Premature loading, Excessive loading
-Improper reinforce, Poor curing, Poor compaction
What is the maximum ratio of silica fume with respect to the cement of the concrete that generates a
negligible effect on the setting time of the concrete?
Up to 10%
Which of the following options is NOT related to the pre-placement concrete preparation activities?
Fill - back
What is the recommended slump value for a normal reinforced cement concrete (RCC)?
2" to 4"
What is the minimum ratio of air entraining admixture recommended when working in a freeze-thaw
climate?
4 percent
How much ratio of spillage should be expected while preparing the concrete to place in the desired
forms?
10 percent
Which of the following statements is correct about placing a 3-inch-thick sand layer over the moisture
barrier before placing the concrete?
ALL
-Finishing time of concrete increases
-Strength of the concrete increases
-Fewer cracks develop
What is the American Concrete Institute's recommended thickness of sand layer over the moisture
barrier before placing the concrete on it?
3 inches
Which of the following problems may arise if you don't finish concrete edges round, neat, and properly?
2|Page
,Chipping
What is the minimum depth of excavation that warrants shoring, bracing, and side slopes?
5'
Which of the following is the most commonly used moisture barrier material in the concrete industry?
Polyethylene
What is the ratio of cement, sand, and aggregate respectively for a RICH mixture of concrete material?
1:2:3
What are two commonly used standards for building construction and design in the industry?
Master Format & Uni F ormat Systems
What is the size of well point pipe commonly used for dewatering an excavation and construction site?
2.5"
What is the 'Compaction factor' for sand/gravel soil to consider while estimating the excavation work for
a concrete project?
0.75 to 0.80
Which of the following relationships holds good regarding the use of cement ratio in cold and hot
climates?
Higher cement ratio is required in cold climate than in hot one
Which of the following tests is commonly used to determine the initial and final setting time of
concrete?
Penetrometer test
Which of the following types of coarse aggregate will produce better strength in concrete formation?
Cubically shaped crushed stones with rough surfaces
Form alignment is achieved with the help of:
Studs & Walers
Which of the following pieces of equipment can be used to inject epoxy into cracks?
ALL
-Paint Pressure Pots
-Hydraulic Pumps
-Caulking guns
3|Page
, How many methods for barrier installation are used before placing the concrete on a structure?
3
Explanation:
There are three types of installation methods for vapor barriers as given below:
Polyethylene barrier direct in contact with concrete placement
Polyethylene barrier with a sand layer between concrete placement
Polyethylene barrier with a stone layer between concrete placement
Which of the following objectives are achieved by the SCREEDING process on a newly poured concrete
slab?
Grading, Leveling, Consolidating
Joint filers for expansion joints are commonly made from:
Bitumen, Cork strip, Pith
How deep (below the surface level) is the backer rod (joint filer) commonly placed in the concrete
expansion joints?
½" below the surface
How many more times does the in-flow of water vapor occur in the concrete without a moisture barrier
than the concrete with a moisture barrier?
Three times
Which of the following conditions will result in uneven settling and subsequently cracks in the concrete?
Uneven granule/soil compacting
What is the ratio of wastage of lightweight rebar #10 commonly used while estimating the concrete
construction project materials ?
5.7 percent
Which of the following tools is sufficient for the compacting of concrete in a small project?
Hand tamper
At 50°F, how long should the concrete be protected to attain sufficient strength (normally 500 Psi)?
48 Hours
Which of the following arrangements can be used to keep the concrete at the recommended 50°F
temperature for allowing proper setting?
Heaters OR Thermal blankets
What is the 'Swell Factor' for sandy loam soil when performing excavation work for a concrete
structure?
4|Page
PRACTICE EXAM AND STUDY GUIDE EXAM
2024 WITH ACTUAL CORRECT QUESTIONS
AND VERIFIED DETAILED ANSWERS
|FREQUENTLY TESTED QUESTIONS AND
SOLUTIONS |ALREADY GRADED A+|BRAND
NEW!!|GUARANTEED ASS |LATEST UPDATE
Which of the following are the recommended dry stone (aggregate) sizes commonly used in the
formation of concrete?
½" to ¾"
What are the standard sizes of column-base footings that form the foundation system of a concrete
building?
4.5 to 12 square feet
What is the recommended depth of TROWELING around the form-edges for better edge finishing of the
concrete once the concrete surface has dulled substantially?
About 1 inch
Which of the following admixtures are commonly added to concrete to achieve better performance and
quality of concrete?
ALL
-Retarding admixture
-Water reducing admixture
-Air entertaining admixture
Why are vapor or moisture barriers used in concrete construction?
To avoid flow - in of water moisture
1|Page
,Which of the following factors can cause the greater cracks in the concrete?
ALL
-
Improper watering, High temperature, Premature loading
-Rapid loading, Premature loading, Excessive loading
-Improper reinforce, Poor curing, Poor compaction
What is the maximum ratio of silica fume with respect to the cement of the concrete that generates a
negligible effect on the setting time of the concrete?
Up to 10%
Which of the following options is NOT related to the pre-placement concrete preparation activities?
Fill - back
What is the recommended slump value for a normal reinforced cement concrete (RCC)?
2" to 4"
What is the minimum ratio of air entraining admixture recommended when working in a freeze-thaw
climate?
4 percent
How much ratio of spillage should be expected while preparing the concrete to place in the desired
forms?
10 percent
Which of the following statements is correct about placing a 3-inch-thick sand layer over the moisture
barrier before placing the concrete?
ALL
-Finishing time of concrete increases
-Strength of the concrete increases
-Fewer cracks develop
What is the American Concrete Institute's recommended thickness of sand layer over the moisture
barrier before placing the concrete on it?
3 inches
Which of the following problems may arise if you don't finish concrete edges round, neat, and properly?
2|Page
,Chipping
What is the minimum depth of excavation that warrants shoring, bracing, and side slopes?
5'
Which of the following is the most commonly used moisture barrier material in the concrete industry?
Polyethylene
What is the ratio of cement, sand, and aggregate respectively for a RICH mixture of concrete material?
1:2:3
What are two commonly used standards for building construction and design in the industry?
Master Format & Uni F ormat Systems
What is the size of well point pipe commonly used for dewatering an excavation and construction site?
2.5"
What is the 'Compaction factor' for sand/gravel soil to consider while estimating the excavation work for
a concrete project?
0.75 to 0.80
Which of the following relationships holds good regarding the use of cement ratio in cold and hot
climates?
Higher cement ratio is required in cold climate than in hot one
Which of the following tests is commonly used to determine the initial and final setting time of
concrete?
Penetrometer test
Which of the following types of coarse aggregate will produce better strength in concrete formation?
Cubically shaped crushed stones with rough surfaces
Form alignment is achieved with the help of:
Studs & Walers
Which of the following pieces of equipment can be used to inject epoxy into cracks?
ALL
-Paint Pressure Pots
-Hydraulic Pumps
-Caulking guns
3|Page
, How many methods for barrier installation are used before placing the concrete on a structure?
3
Explanation:
There are three types of installation methods for vapor barriers as given below:
Polyethylene barrier direct in contact with concrete placement
Polyethylene barrier with a sand layer between concrete placement
Polyethylene barrier with a stone layer between concrete placement
Which of the following objectives are achieved by the SCREEDING process on a newly poured concrete
slab?
Grading, Leveling, Consolidating
Joint filers for expansion joints are commonly made from:
Bitumen, Cork strip, Pith
How deep (below the surface level) is the backer rod (joint filer) commonly placed in the concrete
expansion joints?
½" below the surface
How many more times does the in-flow of water vapor occur in the concrete without a moisture barrier
than the concrete with a moisture barrier?
Three times
Which of the following conditions will result in uneven settling and subsequently cracks in the concrete?
Uneven granule/soil compacting
What is the ratio of wastage of lightweight rebar #10 commonly used while estimating the concrete
construction project materials ?
5.7 percent
Which of the following tools is sufficient for the compacting of concrete in a small project?
Hand tamper
At 50°F, how long should the concrete be protected to attain sufficient strength (normally 500 Psi)?
48 Hours
Which of the following arrangements can be used to keep the concrete at the recommended 50°F
temperature for allowing proper setting?
Heaters OR Thermal blankets
What is the 'Swell Factor' for sandy loam soil when performing excavation work for a concrete
structure?
4|Page
