7-29.
7-30.
7-31.
732.
733.
Which of the following components
supplies the required arounda
curve reach preventing the cylinder
from being pulled in against the
dipper stick when extended?
1.
Dump arms
2.
Boom connecting pins
3.
Swing guide
4.
Centralizer
A bucket is usually slightly wider
at the rear of the bucket to reduce
friction.
1.
True
2. False
Learning Objective: Recognize
the principles of backhoe digging
operations.
Before performing any type of
excavation, an operator should
check or obtain what type of
permit?
1.
Landscaping
2.
Operators
3.
Digging
4.
Environmental
What item determines how much
material can be excavated during
each digging cycle?
1.
The engine rpm
2.
Operator expertise
3.
The length of the dipper
4.
The type of material
What grade stakes should an
operator NOT disturb because
they are used as a reference
when excavating a ditch?
1.
Offset
2.
Centerline
3.
Shoulder
4.
Slope
stick
7-34.
7-35.
736.
7-37.
7-38.
It is better to excavate 1 to
2 inches below grade than not
excavate deep enough.
1.
True
2.
False
Which of the following situations
can occur if an operator improperly
plans an excavation?
1.
Trap the machine
2.
Machine cannot be positioned
to complete job
3.
Hand digging required to
complete job
4.
All of the above
A digging sequence should be
planned to allow a maximum amount
of spoil to be excavated before
the machine is moved to the next
position.
1.
True
2.
False
During an excavation, an operator
should ensure what objective is
reached before repositioning the
backhoe?
1.
Grade (depth) of excavation
2.
Length of excavated material
3.
Height of excavated material
4.
Maximum compaction of
excavation
Learning Objective:
Recognize
the principles of operations and
components of ditchers.
What term is used to describe a
temporary cut made in the earth
for underground utilities?
1.
An excavation
2.
A ditch
3.
A trench
4.
A gully
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