NCCCO DEDICATED PILE DRIVER OPERATOR
TESTED QUESTIONS 2026 FULL SOLUTION
GUIDE
◉ Amplitude. Answer: The magnitude of the vertical movement of
the pile produced by a vibratory unit, may be expressed in inches or
millimeters.
◉ Anchor Pile. Answer: A pile connected to a structure by one or
more ties to furnish lateral support or to resist uplift.
◉ Auger Grout (or Cast) Pile. Answer: Pile formed by boring a hole
with an auger and placing pressurized grout in the hole through the
hollow center of the auger. The auger is withdrawn at a steady rate
as the grout is placed.
◉ Auger. Answer: A helically shaped corkscrew-like tool with a
power driving head on top and cutting head on the bottom designed
to bore holes in the earth by drilling, either with or without the
supplementary use of water. Also, refers to a hand-operated soil
sampler.
,◉ Augercast. Answer: A proprietary Augered Pile. High strength
grout is forced down the center of a flight auger to form a shaft as
the auger is withdrawn.
◉ Augered Pile. Answer: Concrete pile cast-in-place in an augered
hole, which may be belled at the bottom. Suitable where the soil is
dry and the hole will stand open. Also called drilled pier or drilled
shaft
◉ Automatic Pile Hammer. Answer: A power pile hammer in which
the fluid valve is automatically thrown at both ends of the ram
stroke to produce a regular cycle
◉ Bale. Answer: One of the major components of the hammer
system that surrounds and protects the hydraulic actuator and hoses
from damage and is the attachment point for the lifting sheave.
◉ Batter. Answer: A pile driven at an inclination from the vertical to
provide more stability.
◉ Bearing Capacity. Answer: Allowable pile load as limited by the
provision that the pressures developed in the materials along the
pile and below the pile tip shall not exceed the allowable soil bearing
values.
, ◉ Bearing Pile. Answer: A supporting pile for a structure that can be
of wood, concrete or steel in any number of shapes and whose
bearing is reached by point or end bearing, friction, or friction and
compaction, or a combination.
◉ Cast-In-Place Pile. Answer: A concrete pile poured (either with or
without a metal casing) in its permanent location in the ground. Also
called an in-situ pile or caisson.
◉ Centrifuge. Answer: A testing device to approximate gravity-
induced horizontal stresses to compensate for scale used in
modeling pile behavior.
◉ Cofferdam. Answer: A steel or concrete box erected in the water
and then pumped dry to provide a dry work area.
◉ Compacted Concrete Pile. Answer: A cast-in-place pile formed
with an enlarged base. Dry concrete in the base is placed in small
batches, which are compacted by heavy blows while plastic.
◉ Composite Piles. Answer: A pile made up of two or more types or
sizes of piles joined together. The connection between the
components is designed to transmit load and to prevent separation
during and after construction.
TESTED QUESTIONS 2026 FULL SOLUTION
GUIDE
◉ Amplitude. Answer: The magnitude of the vertical movement of
the pile produced by a vibratory unit, may be expressed in inches or
millimeters.
◉ Anchor Pile. Answer: A pile connected to a structure by one or
more ties to furnish lateral support or to resist uplift.
◉ Auger Grout (or Cast) Pile. Answer: Pile formed by boring a hole
with an auger and placing pressurized grout in the hole through the
hollow center of the auger. The auger is withdrawn at a steady rate
as the grout is placed.
◉ Auger. Answer: A helically shaped corkscrew-like tool with a
power driving head on top and cutting head on the bottom designed
to bore holes in the earth by drilling, either with or without the
supplementary use of water. Also, refers to a hand-operated soil
sampler.
,◉ Augercast. Answer: A proprietary Augered Pile. High strength
grout is forced down the center of a flight auger to form a shaft as
the auger is withdrawn.
◉ Augered Pile. Answer: Concrete pile cast-in-place in an augered
hole, which may be belled at the bottom. Suitable where the soil is
dry and the hole will stand open. Also called drilled pier or drilled
shaft
◉ Automatic Pile Hammer. Answer: A power pile hammer in which
the fluid valve is automatically thrown at both ends of the ram
stroke to produce a regular cycle
◉ Bale. Answer: One of the major components of the hammer
system that surrounds and protects the hydraulic actuator and hoses
from damage and is the attachment point for the lifting sheave.
◉ Batter. Answer: A pile driven at an inclination from the vertical to
provide more stability.
◉ Bearing Capacity. Answer: Allowable pile load as limited by the
provision that the pressures developed in the materials along the
pile and below the pile tip shall not exceed the allowable soil bearing
values.
, ◉ Bearing Pile. Answer: A supporting pile for a structure that can be
of wood, concrete or steel in any number of shapes and whose
bearing is reached by point or end bearing, friction, or friction and
compaction, or a combination.
◉ Cast-In-Place Pile. Answer: A concrete pile poured (either with or
without a metal casing) in its permanent location in the ground. Also
called an in-situ pile or caisson.
◉ Centrifuge. Answer: A testing device to approximate gravity-
induced horizontal stresses to compensate for scale used in
modeling pile behavior.
◉ Cofferdam. Answer: A steel or concrete box erected in the water
and then pumped dry to provide a dry work area.
◉ Compacted Concrete Pile. Answer: A cast-in-place pile formed
with an enlarged base. Dry concrete in the base is placed in small
batches, which are compacted by heavy blows while plastic.
◉ Composite Piles. Answer: A pile made up of two or more types or
sizes of piles joined together. The connection between the
components is designed to transmit load and to prevent separation
during and after construction.
