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Subgrade & Base Inspection – FDOT Questions and Answers 100% Correct |
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Subgrade & Base Inspection – FDOT Questions andAnswers 100% Correct | 2024-2025
Subgrade operations can be divided into two basic types. List them. - ANSWER
- Stabilization
-Cement Treatment
Which of the following vary according to the type of subgrade stabilization
performed? - ANSWER __A. the type of finishing equipment
__(B). the method of determining compliance with the bearing requirements
__C. the use of commercial or local materials
__D. the depth to which the subgrade is stabilized
__E. the basis of payment for the work
The following description is for which type of subgrade stabilization? The
Contractor may use either commercial or local materials. He will not be paid
separately for the stabilizing materials he uses. The bearing value determinations
are made by the L.B.R. Method. Type__ Stabilization. - ANSWER Type B
stabilization
On a curve, what is the maximum interval for setting the stakes along the
roadway? - ANSWER 25 feet
Who will set stakes for subgrade operations? - ANSWER Contractors Survey
Party
What is the name for the stakes used to control line? - ANSWER Hubs
,Stakes help to maintain close control in checking the __ and __ of the subgrade. -
ANSWER Width ; Depth
Grade stakes may be referred to as __. - ANSWER Blue tops
How is the exact line indicated on the hubs? - ANSWER Tucks set in hub tops
The embankment surface to be stabilized or treated must comply with the __ and
__ requirements before the beginning of subgrade operations.
Who is responsible for verifying this compliance? - ANSWER Plan ;
Specification
Inspector
Before any stabilizing material is spread on the subgrade, the roadbed must be
brought to a plane approximately __ to the plan of the proposed finished
subgrade surface. - ANSWER Parallel
When cement-treated subgrade is constructed of central plant-mixed material,
the underlying roadbed must be __ when the material is spread. - ANSWER
Moist
Number the following documents according to governing order -- with 1 being the
highest, 2 the next highest and so on:
, __A. Contract Plans
__B. Supplemental Special Provisions
__C. Special Provisions
__D. Standard Specifications
__E. Supplemental Specifications - ANSWER (_3_) A. Contract Plans
(_1_) B. Supplemental Special Provisions
(_2_) C. Special Provisions
(_5_) D. Standard Specifications
(_4_) E. Supplemental Specifications
When the existing base material is to be incorporated into the subgrade, should it
be used before or after other stabilizing additives have been mixed in? -
ANSWER Before
Who determines what material or combination of materials to use to obtain the
required bearing values? - ANSWER Contractor
Where will you find frequencies for sampling, sample sizes, etc.? - ANSWER
Sampling, Testing, & Reporting Guide
What kind and type of cement is used for cement-treated subgrade? -
ANSWER Portland Cement Type I
If the water to be used in a cement-treatment job comes from a city's water
supply, may it be used without testing? - ANSWER Yes
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