PCC PAVING INSPECTION LADOTD
QUESTIONS & SOLUTIONS
For edges not along longitudinal joints, the surface within the 6 inches adjacent to the
edge shall not vary more than - ANSWER1/4"
Conventional forms will not be required at slab edges along longitudinal joints, provided
the surface within the 6 inch width adjacent to the edge does not vary more than -
ANSWER1/8"
Texturing of the concrete is to be done using a _______ and a ________ texturing
device - ANSWERcarpet drag; metal tine
The carpet drag must be reasonably free from indentions over - ANSWER1/16" deep
In slip form paving, the drag is usually attached to the - ANSWERlongitudinal float
machine
Two approved methods of floating are - ANSWERmechanical and hand held
The longitudinal tube float is set at a __ angle to the centerline of the slab. -
ANSWER45 degree
Following the mechanical, longitudinal tube float, the _____________ float may be used
to smooth and fill open textured pavement areas. - ANSWERhand held
The vibratory, longitudinal bull float is only used - ANSWERover joints
T/F Excess water and loose material should be removed from the surface with a 10 foot,
metal, static straightedge. - ANSWERTrue
T/F The handle of a straightedge must be approximately 5 foot longer than 1/2 the width
of the pavement slab. - ANSWERFalse
T/F When working the straightedge, the blade is first worked at a 45 degree angle to the
centerline and then with the blade parallel to the centerline. - ANSWERTrue
T/F The straightedge operations should advance along the concrete slab in successive
stages of 5 feet. - ANSWERTrue
T/F When performing straightedge operations, water may be thrown on the surface to
make the work easier. - ANSWERFalse
, If the application of water to the concrete surface is permitted during finishing
operations, it shall be applied as - ANSWERfog spray
Screeds yield the _____ grade of the concrete slab - ANSWERinitial
_________ finishing will be required on all highway pavements or _____, regardless of
width. - ANSWERMachine; ramps
Under what conditions will hand finishing be permitted? - ANSWER1. If mechanical
equipment breaks down. 2. Pavement not a principal highway and width does not
exceed 16 ft. 3. Area has regular dimensions.
T/F A strike off bar is used to level the concrete. - ANSWERTrue
T/F Prior to concrete placement and the paver in place, th DOTD Inspector should use a
string line to make sure the strike off is true to line. - ANSWERTrue
T/F A toothed rake is used for leveling concrete. - ANSWERFalse
T/F Vibrators must be operated at least 20 seconds in each place. - ANSWERFalse
T/F Over vibration of the concrete mixture will cause the mortar to rise to the top surface
of the pavement slab. - ANSWERTrue
T/F Proper consolidation of a concrete mixture is achieved when submerged coarse
aggregate has come to the top of the pavements surface. - ANSWERFalse
T/F Machine vibrators must automatically start and stop vibrations when the machine
starts and stops. - ANSWERTrue
T/F Hand held vibrators are used to consolidate t and compact concrete around joint
assemblies. - ANSWERTrue
T/F If a dowel assembly is knocked out of alignment and damaged, it must dug out and
reinstalled at its proper location. - ANSWERtrue
T/F With the exception of finishing equipment, mechanical equipment must not be
allowed to operate on an existing pavement until the pavement has attained a
compressive strength of at least 4000 psi - ANSWERfalse
T/F Finishing equipment will be allowed to ride on existing pavement after three days of
curing above 40 degrees F, as long as no damage occurs. - ANSWERTrue
T/F No damage will be done if fresh concrete, placed to an existing slab, fills in the tine
finish on the existing pavement. - ANSWERFalse
QUESTIONS & SOLUTIONS
For edges not along longitudinal joints, the surface within the 6 inches adjacent to the
edge shall not vary more than - ANSWER1/4"
Conventional forms will not be required at slab edges along longitudinal joints, provided
the surface within the 6 inch width adjacent to the edge does not vary more than -
ANSWER1/8"
Texturing of the concrete is to be done using a _______ and a ________ texturing
device - ANSWERcarpet drag; metal tine
The carpet drag must be reasonably free from indentions over - ANSWER1/16" deep
In slip form paving, the drag is usually attached to the - ANSWERlongitudinal float
machine
Two approved methods of floating are - ANSWERmechanical and hand held
The longitudinal tube float is set at a __ angle to the centerline of the slab. -
ANSWER45 degree
Following the mechanical, longitudinal tube float, the _____________ float may be used
to smooth and fill open textured pavement areas. - ANSWERhand held
The vibratory, longitudinal bull float is only used - ANSWERover joints
T/F Excess water and loose material should be removed from the surface with a 10 foot,
metal, static straightedge. - ANSWERTrue
T/F The handle of a straightedge must be approximately 5 foot longer than 1/2 the width
of the pavement slab. - ANSWERFalse
T/F When working the straightedge, the blade is first worked at a 45 degree angle to the
centerline and then with the blade parallel to the centerline. - ANSWERTrue
T/F The straightedge operations should advance along the concrete slab in successive
stages of 5 feet. - ANSWERTrue
T/F When performing straightedge operations, water may be thrown on the surface to
make the work easier. - ANSWERFalse
, If the application of water to the concrete surface is permitted during finishing
operations, it shall be applied as - ANSWERfog spray
Screeds yield the _____ grade of the concrete slab - ANSWERinitial
_________ finishing will be required on all highway pavements or _____, regardless of
width. - ANSWERMachine; ramps
Under what conditions will hand finishing be permitted? - ANSWER1. If mechanical
equipment breaks down. 2. Pavement not a principal highway and width does not
exceed 16 ft. 3. Area has regular dimensions.
T/F A strike off bar is used to level the concrete. - ANSWERTrue
T/F Prior to concrete placement and the paver in place, th DOTD Inspector should use a
string line to make sure the strike off is true to line. - ANSWERTrue
T/F A toothed rake is used for leveling concrete. - ANSWERFalse
T/F Vibrators must be operated at least 20 seconds in each place. - ANSWERFalse
T/F Over vibration of the concrete mixture will cause the mortar to rise to the top surface
of the pavement slab. - ANSWERTrue
T/F Proper consolidation of a concrete mixture is achieved when submerged coarse
aggregate has come to the top of the pavements surface. - ANSWERFalse
T/F Machine vibrators must automatically start and stop vibrations when the machine
starts and stops. - ANSWERTrue
T/F Hand held vibrators are used to consolidate t and compact concrete around joint
assemblies. - ANSWERTrue
T/F If a dowel assembly is knocked out of alignment and damaged, it must dug out and
reinstalled at its proper location. - ANSWERtrue
T/F With the exception of finishing equipment, mechanical equipment must not be
allowed to operate on an existing pavement until the pavement has attained a
compressive strength of at least 4000 psi - ANSWERfalse
T/F Finishing equipment will be allowed to ride on existing pavement after three days of
curing above 40 degrees F, as long as no damage occurs. - ANSWERTrue
T/F No damage will be done if fresh concrete, placed to an existing slab, fills in the tine
finish on the existing pavement. - ANSWERFalse
