Rhode Island Excavator Operator Study Guide Questions
With Complete Solutions
Accepted engineering practices Correct Answers means those
requirements which are compatible with standards of practice
required by a registered professional engineer.
Actual slope Correct Answers the slope to which an excavation
face is excavated.
Additional requirement for shield systems used in trench
excavations. Excavations of earth material to a level not greater
than Correct Answers 2 feet (.61 m) below the bottom of a
shield shall be permitted, but only if the shield is designed to
resist the forces calculated for the full depth of the trench, and
there are no indications while the trench is open of a possible
loss of soil from behind or below the bottom of the shield.
Additional requirements for support systems for trench
excavations.
(i) Excavation of material to a level Correct Answers no greater
than 2 feet (.61 m) below the bottom of the members of a
support system shall be permitted, but only if the system is
designed to resist the forces calculated for the full depth of the
trench, and there are no indications while the trench is open of a
possible loss of soil from behind or below the bottom of the
support system.
Adequate precaution shall be taken such as providing
ventilation, to prevent employee exposure to an atmosphere
containing a concentration of a flammable gas in excess of
,Correct Answers 20 percent of the lower flammable limit of the
gas.
Adequate precautions shall be taken to prevent employee
exposure to atmospheres containing Correct Answers less than
19.5 percent oxygen and other hazardous atmospheres.
Adequate protection shall be provided to protect employees
from loose rock or soil that could pose a hazard by falling or
rolling from an excavation face. Such protection shall consist of
Correct Answers consist of scaling to remove loose material;
installation of protective barricades at intervals as necessary on
the face to stop and contain falling material; or other means that
provide equivalent protection.
Aluminum Hydraulic Shoring Correct Answers means a pre-
engineered shoring system comprised of aluminum hydraulic
cylinders (crossbraces) used in conjunction with vertical rails
(uprights) or horizontal rails (walers). Such system is designed,
specifically to support the sidewalls of an excavation and
prevent cave-ins.
An inspection shall be conducted by the competent person
Correct Answers prior to the start of work and as needed
throughout the shift. Inspections shall also be made after every
rainstorm or other hazard increasing occurrence. These
inspections are only required when employee exposure can be
reasonably anticipated.
At least one copy of the tabulated data which identifies the
registered professional engineer who approved the data, shall be
, maintained at the jobsite during construction of the protective
system. After that time the data may be Correct Answers stored
off the jobsite, but a copy of the data shall be made available to
the Secretary upon request.
Backfilling shall progress together with Correct Answers the
removal of support systems from excavations.
Before temporary removal of individual members begins,
additional precautions shall be taken to ensure Correct Answers
the safety of employees, such as installing other structural
members to carry the loads imposed on the support system.
Bell-bottom pier hole Correct Answers means a type of shaft or
footing excavation, the bottom of which is made larger than the
cross section above to form a belled shape
Benching Correct Answers (Benching system) means a method
of protecting employees from cave-ins by excavating the sides
of an excavation to form one or a series of horizontal levels or
steps, usually with vertical or near-vertical surfaces between
levels.
Cave-in Correct Answers means the separation of a mass of soil
or rock material from the side of an excavation, or the loss of
soil from under a trench shield or support system, and its sudden
movement into the excavation, either by falling or sliding, in
sufficient quantity so that
Cemented Soil Correct Answers a soil in which the particles are
held together by a chemical agent, such as calcium carbonate,
With Complete Solutions
Accepted engineering practices Correct Answers means those
requirements which are compatible with standards of practice
required by a registered professional engineer.
Actual slope Correct Answers the slope to which an excavation
face is excavated.
Additional requirement for shield systems used in trench
excavations. Excavations of earth material to a level not greater
than Correct Answers 2 feet (.61 m) below the bottom of a
shield shall be permitted, but only if the shield is designed to
resist the forces calculated for the full depth of the trench, and
there are no indications while the trench is open of a possible
loss of soil from behind or below the bottom of the shield.
Additional requirements for support systems for trench
excavations.
(i) Excavation of material to a level Correct Answers no greater
than 2 feet (.61 m) below the bottom of the members of a
support system shall be permitted, but only if the system is
designed to resist the forces calculated for the full depth of the
trench, and there are no indications while the trench is open of a
possible loss of soil from behind or below the bottom of the
support system.
Adequate precaution shall be taken such as providing
ventilation, to prevent employee exposure to an atmosphere
containing a concentration of a flammable gas in excess of
,Correct Answers 20 percent of the lower flammable limit of the
gas.
Adequate precautions shall be taken to prevent employee
exposure to atmospheres containing Correct Answers less than
19.5 percent oxygen and other hazardous atmospheres.
Adequate protection shall be provided to protect employees
from loose rock or soil that could pose a hazard by falling or
rolling from an excavation face. Such protection shall consist of
Correct Answers consist of scaling to remove loose material;
installation of protective barricades at intervals as necessary on
the face to stop and contain falling material; or other means that
provide equivalent protection.
Aluminum Hydraulic Shoring Correct Answers means a pre-
engineered shoring system comprised of aluminum hydraulic
cylinders (crossbraces) used in conjunction with vertical rails
(uprights) or horizontal rails (walers). Such system is designed,
specifically to support the sidewalls of an excavation and
prevent cave-ins.
An inspection shall be conducted by the competent person
Correct Answers prior to the start of work and as needed
throughout the shift. Inspections shall also be made after every
rainstorm or other hazard increasing occurrence. These
inspections are only required when employee exposure can be
reasonably anticipated.
At least one copy of the tabulated data which identifies the
registered professional engineer who approved the data, shall be
, maintained at the jobsite during construction of the protective
system. After that time the data may be Correct Answers stored
off the jobsite, but a copy of the data shall be made available to
the Secretary upon request.
Backfilling shall progress together with Correct Answers the
removal of support systems from excavations.
Before temporary removal of individual members begins,
additional precautions shall be taken to ensure Correct Answers
the safety of employees, such as installing other structural
members to carry the loads imposed on the support system.
Bell-bottom pier hole Correct Answers means a type of shaft or
footing excavation, the bottom of which is made larger than the
cross section above to form a belled shape
Benching Correct Answers (Benching system) means a method
of protecting employees from cave-ins by excavating the sides
of an excavation to form one or a series of horizontal levels or
steps, usually with vertical or near-vertical surfaces between
levels.
Cave-in Correct Answers means the separation of a mass of soil
or rock material from the side of an excavation, or the loss of
soil from under a trench shield or support system, and its sudden
movement into the excavation, either by falling or sliding, in
sufficient quantity so that
Cemented Soil Correct Answers a soil in which the particles are
held together by a chemical agent, such as calcium carbonate,
