Asphalt - Concrete Questions with
Correct Answers
The amount of processing required to produce suitable aggregate materials for
construction purposes depends on the nature of the raw materials available and the
desired attributes of the end product. - ANSWERSTrue
Smaller commercial aggregate plants are the major source of crushed stone for the
construction industry in metropolitan areas. - ANSWERSFalse
Crushing plants use step reduction because the amount of size reduction accomplished
is indirectly related to the energy applied. - ANSWERSFalse
When the difference between the size of the feed material entering the crusher and the
size of the crushed product is small, a large amount of energy is required. -
ANSWERSFalse
Jaw crushers are typically employed as tertiary units because of their large energy-
storing flywheels and high mechanical advantage. - ANSWERSFalse
Jaw crushers do not handle slabby material well. - ANSWERSTrue
The space between the jaws increases as the stone travels downward under the effect
of gravity and the motion of the movable jaw, until the stone ultimately passes through
the lower opening. - ANSWERSFalse
Jaw crushers are usually designed with the toggle as the strongest part. -
ANSWERSFalse
Double-toggle Blake-type jaw crushers are so small and light that they lend themselves
to portable applications. - ANSWERSFalse
Gyratory crushers are the most efficient of all primary-type crushers. - ANSWERSTrue
If a gyratory crusher is used as a secondary crusher, the size selected may be dictated
by the size of the rock from the blasting operation or by a desired capacity. -
ANSWERSFalse
When a gyratory crusher is used as a primary crusher, increasing its speed within
reasonable limits may increase the capacity. - ANSWERSFalse
, Gyratory crushers with straight concaves are used as secondary crushers, whereas
those with nonchoking concaves are commonly used as primary crushers. -
ANSWERSFalse
Cone crushers are used as primary crushers. - ANSWERSFalse
Cone crushers have a shorter cone (less height) than gyratory crushers. -
ANSWERSTrue
Cone crushers rotate at a higher speed than gyratory crushers. - ANSWERSTrue
Because the material is dragged against the liner, single-roll crushers are economical
for crushing highly abrasive materials. - ANSWERSFalse
Roll crushers are used for additional reduction in the size of stone after the output of the
blasting operation has been subjected to one or more stages of prior crushing. -
ANSWERSTrue
Single-roll crushers can handle sticky materials. - ANSWERSTrue
The ability to easily accommodate a pavement section to staged construction and to
recycle old pavements, and the fact that mix designs can be adjusted to use local
materials, are three critical factors favoring the use of asphalt materials. -
ANSWERSTrue
The mixing plant, trucks, asphalt paver, and compactors must be unsynchronized for an
efficient, cost-effective operation. - ANSWERSFalse
Asphalt pavements are constructed as layered systems. - ANSWERSTrue
The aggregate characteristics and amount of asphalt cement are designed specifically
to match the needs of the binder and surfacing courses. - ANSWERSTrue
Pavements are designed to provide a stable, smooth, and skid-resistant riding surface. -
ANSWERSTrue
The asphalt mixture must seal the base, subbase, and subgrade to prevent water
intrusion. - ANSWERSTrue
Vehicle fuel efficiency, ride quality, and safety are unaffected by surface tension. -
ANSWERSFalse
The purpose of blending aggregates and asphalt cement is to achieve a final product
that satisfies all of the objectives. - ANSWERSTrue
Correct Answers
The amount of processing required to produce suitable aggregate materials for
construction purposes depends on the nature of the raw materials available and the
desired attributes of the end product. - ANSWERSTrue
Smaller commercial aggregate plants are the major source of crushed stone for the
construction industry in metropolitan areas. - ANSWERSFalse
Crushing plants use step reduction because the amount of size reduction accomplished
is indirectly related to the energy applied. - ANSWERSFalse
When the difference between the size of the feed material entering the crusher and the
size of the crushed product is small, a large amount of energy is required. -
ANSWERSFalse
Jaw crushers are typically employed as tertiary units because of their large energy-
storing flywheels and high mechanical advantage. - ANSWERSFalse
Jaw crushers do not handle slabby material well. - ANSWERSTrue
The space between the jaws increases as the stone travels downward under the effect
of gravity and the motion of the movable jaw, until the stone ultimately passes through
the lower opening. - ANSWERSFalse
Jaw crushers are usually designed with the toggle as the strongest part. -
ANSWERSFalse
Double-toggle Blake-type jaw crushers are so small and light that they lend themselves
to portable applications. - ANSWERSFalse
Gyratory crushers are the most efficient of all primary-type crushers. - ANSWERSTrue
If a gyratory crusher is used as a secondary crusher, the size selected may be dictated
by the size of the rock from the blasting operation or by a desired capacity. -
ANSWERSFalse
When a gyratory crusher is used as a primary crusher, increasing its speed within
reasonable limits may increase the capacity. - ANSWERSFalse
, Gyratory crushers with straight concaves are used as secondary crushers, whereas
those with nonchoking concaves are commonly used as primary crushers. -
ANSWERSFalse
Cone crushers are used as primary crushers. - ANSWERSFalse
Cone crushers have a shorter cone (less height) than gyratory crushers. -
ANSWERSTrue
Cone crushers rotate at a higher speed than gyratory crushers. - ANSWERSTrue
Because the material is dragged against the liner, single-roll crushers are economical
for crushing highly abrasive materials. - ANSWERSFalse
Roll crushers are used for additional reduction in the size of stone after the output of the
blasting operation has been subjected to one or more stages of prior crushing. -
ANSWERSTrue
Single-roll crushers can handle sticky materials. - ANSWERSTrue
The ability to easily accommodate a pavement section to staged construction and to
recycle old pavements, and the fact that mix designs can be adjusted to use local
materials, are three critical factors favoring the use of asphalt materials. -
ANSWERSTrue
The mixing plant, trucks, asphalt paver, and compactors must be unsynchronized for an
efficient, cost-effective operation. - ANSWERSFalse
Asphalt pavements are constructed as layered systems. - ANSWERSTrue
The aggregate characteristics and amount of asphalt cement are designed specifically
to match the needs of the binder and surfacing courses. - ANSWERSTrue
Pavements are designed to provide a stable, smooth, and skid-resistant riding surface. -
ANSWERSTrue
The asphalt mixture must seal the base, subbase, and subgrade to prevent water
intrusion. - ANSWERSTrue
Vehicle fuel efficiency, ride quality, and safety are unaffected by surface tension. -
ANSWERSFalse
The purpose of blending aggregates and asphalt cement is to achieve a final product
that satisfies all of the objectives. - ANSWERSTrue
