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CSLB Concrete C8 License Practice Test #2 Solved 100% Correct
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CSLB Concrete C8 License Practice Test #2 Solved 100% Correct
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CSLB Concrete C8 License Practice Test#2 Solved 100% Correct
"Specific performance admixtures" are the admixtures that can provide a desired
performance characteristics other than: - ANSWER-ALL OF THESE
-Reducing water content
-Changing the setting time
-Changing the functionality
A concrete slab spans 15' x 12' x 4". The slab has a 3' x 3' sunlight cut out in the center.
How much concrete will be required? - ANSWER-2 1/4cu yds
According to Caltrans recommendations, air entraining admixtures are used in concrete
in the climate zone _______________. - ANSWER-|||
Explanation:
Area ||| is classified as a severe climate, where freeze-thaw cycles and heavy salting
occurs frequently and where chains are used.
All of the structural steel is considered satisfactory even if it is rusted, but still meets the
density requirements, except ___________________. - ANSWER-Pre stressing steel
Explanation:
If the pre stressing steel is rusted, it cannot be used since it does not meet the
compliance requirements.
As per the classification, all the chemical admixtures fall under ASTM designation
_________. - ANSWER-C494
Before the concrete pavement begins, which of the following needs more attention? -
ANSWER-Tie bar detailing
Explanation:
As reinforcement work typically differs in pavement works, tie bar detailing needs more
attention than the other listed options.
Coarse aggregate in concrete is the material that is retained in sieve number
____________. - ANSWER-#4
Explanation:
The one which passes through sieve #4 is the fine aggregate.
, Concrete proportioning is done based on the facilities available at the site. Which are
the general proportioning methods used for concrete? - ANSWER-ALL OF THESE
-Surface area method
-Mix design based on flexural strength
-Maximum destiny method
Concrete surfaces which are frequently subject to freezing and thawing, should NOT
have _________________ finishing. - ANSWER-Splattered
Explanation:
This finish will peel and spall.
Construction joints in the pavement are generally created by ___________________. -
ANSWER-ALL OF THESE!
-Scoring concrete with a grooving tool
-Rounding corners with the edger tools
-Saw cutting the hard concrete
For most of the work, concrete is proportioned with batching. If an error is reported in
batching, it is related to __________________. - ANSWER-ALL OF THESE!
-Cement
-Fine aggregate
-Coarse aggregate
Hope is the water content managed during the concrete placement? - ANSWER-BOTH
OF THESE!
-By ball penetration test
-By slump test
It depends on the workability of the concrete. If the penetration result is <= 3 inches,
penetration test is applicable, if the result is more than 3", slump test is applicable
How much concrete is required to pour a volume of 15' x 30' x 1.5'? - ANSWER-25cu
yds
If a new slab is to be added or joined to an existing one, which of the following will
happen if the new work bleeds during concreting. - ANSWER-The surface will develop
cracks
If the admixtures are used in concrete for the purpose of delayed setting and hardening
of concrete, they are called _____________? - ANSWER-Retarders
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