The maximum size of the conduit or pipe shall NOT exceed _______ of the thickness of the concrete. - Answer - 1/3 Which of the following tests for concrete is conducted at the site/field? - Answer - Color Test Explanation: Rest of the above are laboratory tests. If the concrete compressive stren...
CSLB Concrete C8 License Practice Test #2
The maximum size of the conduit or pipe shall NOT exceed _______ of the thickness of
the concrete. - Answer - 1/3
Which of the following tests for concrete is conducted at the site/field? - Answer - Color Test
Explanation: Rest of the above are laboratory tests.
If the concrete compressive strength specified is less than 3600 psi, it has the option of being tested at 28 days and is able to accept the concrete if it attains ___________ percentage of the minimum required strength. - Answer - 85
If the admixtures are used in concrete for the purpose of delayed setting and hardening of concrete, they are called _____________? - Answer - Retarders
Which of the following are the general types of vibrating needles that are in use? - Answer - ALL ANSWERS!
-Internal vibrators
-Immersion vibrators
-Surface vibrators
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
The minimum cementitious material that is required for concrete bridging deck is ______________lbs/cu yd. - Answer - 675
The amount of free water used in concrete shall not exceed ____________ pounds per cubic yard of concrete. - Answer - 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. - Answer - Steel dowels Which of the following is NOT an example of blended cement? - Answer - 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? - Answer - Control Joint
Which of the following is NOT used as concrete chemicals? - Answer - 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 ________________. - Answer - Air entrainment admixtures
The fly ash which is used as SCM has the specific gravity ___________________. - Answer - 1.9 - 2.8
The leveling operation that removes lumps and hollows and provides a true and uniform
concrete surface is called ______________________. - Answer - Screeding
If the quantity of concrete is less than _____________ cubic yards, the compliance test reports are not required. - Answer - 50
Which type of Portland cement is used when early strength is expected? - Answer - Type |||
Which of the following factor influence the positioning of the joints in a slab on grade? - Answer - ALL OF THESE
-Sub grade conditions
-Finishing requirements
-Temperature
Which of the following is NOT a property of concrete? - Answer - High tensile strength
The concrete work is done in freezing zones, it gets cured by ______________. - Answer - Steam
Explanation:
It is done by heating concrete by steam or using alternating current, so that water content in the concrete is not increased.
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