ASPHALT EXAMPREP TESTED QUESTIONS WITH ACCURATE RESPONSES PREMIUM LEARNING PACKAGE

ASPHALT EXAMPREP TESTED QUESTIONS
WITH ACCURATE RESPONSES PREMIUM
LEARNING PACKAGE

●● Smaller commercial aggregate plants are the major source of crushed
stone for the construction industry in metropolitan areas.
Answer: False


●● Crushing plants use step reduction because the amount of size
reduction accomplished is indirectly related to the energy applied.
Answer: False


●● 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.
Answer: False


●● Jaw crushers are typically employed as tertiary units because of their
large energy-storing flywheels and high mechanical advantage.
Answer: False


●● Jaw crushers do not handle slabby material well.
Answer: True

,●● 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.
Answer: False


●● Jaw crushers are usually designed with the toggle as the strongest
part.
Answer: False


●● Double-toggle Blake-type jaw crushers are so small and light that
they lend themselves to portable applications.
Answer: False


●● Gyratory crushers are the most efficient of all primary-type crushers.
Answer: True


●● 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.
Answer: False


●● When a gyratory crusher is used as a primary crusher, increasing its
speed within reasonable limits may increase the capacity.

,Answer: False


●● Gyratory crushers with straight concaves are used as secondary
crushers, whereas those with nonchoking concaves are commonly used
as primary crushers.
Answer: False


●● Cone crushers are used as primary crushers.
Answer: False


●● Cone crushers have a shorter cone (less height) than gyratory
crushers.
Answer: True


●● Cone crushers rotate at a higher speed than gyratory crushers.
Answer: True


●● Because the material is dragged against the liner, single-roll crushers
are economical for crushing highly abrasive materials.
Answer: False


●● 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.

, Answer: True


●● Single-roll crushers can handle sticky materials.
Answer: True


●● 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.
Answer: True


●● The mixing plant, trucks, asphalt paver, and compactors must be
unsynchronized for an efficient, cost-effective operation.
Answer: False


●● Asphalt pavements are constructed as layered systems.
Answer: True


●● The aggregate characteristics and amount of asphalt cement are
designed specifically to match the needs of the binder and surfacing
courses.
Answer: True