LADOTD PCC PLANT INSPECTION FINAL EXAM QUESTIONS WITH REVISED
ANSWERS FOR 2025/ 2026 GRADED TO PASS
The DOTD Inspector is required to visit the contractor's plant...
the DOTD certifies inspector
Acceptance and sampling testing are performed by or under the direction of whom?
district laboratory engineer
Who should the contractor's proposed mix design must be submitted to for acceptance?
Qualified Products List
The department's publication which lists products for which source approval has been granted
Materials Sampling Manual
The minimum sampling frequency by section and material is delineated in the...
sampling plan
A schedule which outlines the minimum sampling and testing frequencies for all materials to be
used on a project
batch plant
The type of concrete plant referred to as ready mix
batch plant
The type of plant that uses a truck mixers to completely mix the concrete components at the plant
before transport to the jobsite
Central mix plant
The type of plant that uses a stationary mixer at the plant site to mix the concrete components
and transports the mixture to the jobsite in truck mixers or non agitator/haul trucks
storage bins, silos, weigh hoppers, scales, water meters, admixture dispensers, truck mixers, and
non agitator trucks
What types of equipment are used at PCC batch plants?
cumulative weighing
cement, aggregates, and water
What does concrete primarily consist of?
Sections 601, 805, & 901 of the standard specs
Page 1 of 16
,PCC produced and delivered for use in the building of roads and structures must conform to...
901, 1006, and 1016
Concrete produced for precast units shall conform to what sections of the standard specs?
minor structural concrete
Concrete produced and delivered for use in the construction of curbs, gutters, medians, and
catchbasins
quality control
The constant monitoring by the contractor of equipment, materials, processes, and making the
necessary adjustments to ensure that concrete mixtures produced and placed are uniform, are
within control limits, and meet spec requirements
supplemental specs, plans, and plan changes/special agreements
DOTD specs can be overridden by...
2
How many categories of concrete are there?
the project contract, the project plans, and Table 1, Master Proportion Table
Concrete mixtures shall be produced in accordance with requirements as identified on...
a proposed mix design
Before any concrete is placed on a project, what should the contractor submit to the department
for acceptance?
the contractor's certified concrete technician
Who is responsible for designing the concrete mixture, taking samples, and performing tests
necessary for control of the concrete mixture within spec requirements?
daily when the plant is operating and producing concrete for a DOTD project
The weighing of one concrete component with a different concrete component in the same
hopper by the same scale
district laboratory engineer
Who certifies all plants and trucks used in the production and delivery of concrete for DOTD
projects?
the contractor's certified concrete technician
Who is responsible for making adjustments in proportioning of materials used to produce the
specified concrete?
Page 2 of 16
, contractor
Who is responsible for the operation & maintenance of a plant supplying concrete for use on
DOTD projects?
the department
Whose responsibility is it to sample and perform tests on materials for the purpose of source
approval and acceptance?
gradation
The relative size of particles of a specific aggregate sample expressed passing designated sieves
based on the total dry weight of the sample
sand
In Louisiana, fone aggregate for Portland cement concrete is defined as...
0.6% or less alkiles
Aggregates found to be potentially reactive with cement alkalies will be restricted for use with
cement or a combination of cement and fly ash containing what?
Qualified Products List #2
Aggregates from sources approved for use on department projects which are excessively reactive
are indicated on...
qualified products list
The specific gravity of approved Louisiana aggregate may obtained from the...
Portland cement & pozzolans
Portland-pozzolan cement is formed from mixture of...
Type 1B
The cement type most commonly used for DOTD construction
hydration
The hardening of the concrete caused by the chemical reaction between the cement and water
94 pounds
How much does a bag of cement weigh?
water cement ratio
The number of gallons of water per bag of cement, or pounds of water per pound of cement
aggregates
Page 3 of 16
ANSWERS FOR 2025/ 2026 GRADED TO PASS
The DOTD Inspector is required to visit the contractor's plant...
the DOTD certifies inspector
Acceptance and sampling testing are performed by or under the direction of whom?
district laboratory engineer
Who should the contractor's proposed mix design must be submitted to for acceptance?
Qualified Products List
The department's publication which lists products for which source approval has been granted
Materials Sampling Manual
The minimum sampling frequency by section and material is delineated in the...
sampling plan
A schedule which outlines the minimum sampling and testing frequencies for all materials to be
used on a project
batch plant
The type of concrete plant referred to as ready mix
batch plant
The type of plant that uses a truck mixers to completely mix the concrete components at the plant
before transport to the jobsite
Central mix plant
The type of plant that uses a stationary mixer at the plant site to mix the concrete components
and transports the mixture to the jobsite in truck mixers or non agitator/haul trucks
storage bins, silos, weigh hoppers, scales, water meters, admixture dispensers, truck mixers, and
non agitator trucks
What types of equipment are used at PCC batch plants?
cumulative weighing
cement, aggregates, and water
What does concrete primarily consist of?
Sections 601, 805, & 901 of the standard specs
Page 1 of 16
,PCC produced and delivered for use in the building of roads and structures must conform to...
901, 1006, and 1016
Concrete produced for precast units shall conform to what sections of the standard specs?
minor structural concrete
Concrete produced and delivered for use in the construction of curbs, gutters, medians, and
catchbasins
quality control
The constant monitoring by the contractor of equipment, materials, processes, and making the
necessary adjustments to ensure that concrete mixtures produced and placed are uniform, are
within control limits, and meet spec requirements
supplemental specs, plans, and plan changes/special agreements
DOTD specs can be overridden by...
2
How many categories of concrete are there?
the project contract, the project plans, and Table 1, Master Proportion Table
Concrete mixtures shall be produced in accordance with requirements as identified on...
a proposed mix design
Before any concrete is placed on a project, what should the contractor submit to the department
for acceptance?
the contractor's certified concrete technician
Who is responsible for designing the concrete mixture, taking samples, and performing tests
necessary for control of the concrete mixture within spec requirements?
daily when the plant is operating and producing concrete for a DOTD project
The weighing of one concrete component with a different concrete component in the same
hopper by the same scale
district laboratory engineer
Who certifies all plants and trucks used in the production and delivery of concrete for DOTD
projects?
the contractor's certified concrete technician
Who is responsible for making adjustments in proportioning of materials used to produce the
specified concrete?
Page 2 of 16
, contractor
Who is responsible for the operation & maintenance of a plant supplying concrete for use on
DOTD projects?
the department
Whose responsibility is it to sample and perform tests on materials for the purpose of source
approval and acceptance?
gradation
The relative size of particles of a specific aggregate sample expressed passing designated sieves
based on the total dry weight of the sample
sand
In Louisiana, fone aggregate for Portland cement concrete is defined as...
0.6% or less alkiles
Aggregates found to be potentially reactive with cement alkalies will be restricted for use with
cement or a combination of cement and fly ash containing what?
Qualified Products List #2
Aggregates from sources approved for use on department projects which are excessively reactive
are indicated on...
qualified products list
The specific gravity of approved Louisiana aggregate may obtained from the...
Portland cement & pozzolans
Portland-pozzolan cement is formed from mixture of...
Type 1B
The cement type most commonly used for DOTD construction
hydration
The hardening of the concrete caused by the chemical reaction between the cement and water
94 pounds
How much does a bag of cement weigh?
water cement ratio
The number of gallons of water per bag of cement, or pounds of water per pound of cement
aggregates
Page 3 of 16
