7-18.
Which of the following mounting
is the most commonly used excavator
travel unit?
1.
Track
2.
Truck
3.
Selfpropelled wheel
4.
Train
7-19.
A massive frame that includes the
turntable and the dead axles or
cross members that transmit weight
to the track frames.
This
statement is a description of what
component of an excavator?
1.
The superstructure
2.
The attachment assembly
3.
The carbody
4.
The counterweight
7-20.
What is the rotation work range
of a truckmounted excavator in
degrees?
1.
360°
2.
270°
3.
180°
4.
90°
7-21.
Which of the following advantages
does a truck-mounted excavator have
over a track-mounted type?
1.
Stability
2.
360° rotation work range
3.
Low groundbearing pressure
4.
Rapid mobility
7-22.
The front axle oscillation lock
levers on the self-propelled wheel-
mounted excavator are used to help
stabilize the excavator during
which of the following operations?
1.
Travel
2.
Working over the side
3.
Loading on a low-bed trailer
4.
Beach operations
7-23.
Before traveling with an excavator,
you should check the travel route
for which of the following limits?
1.
Weight
2.
Height
3.
Width
4.
All of the above
7-24.
You should stop traveling with the
self-propelled wheel-mounted
excavator after 2 hours of highway
travel to allow the tires to cool
for what period of time?
1.
1/2 hour
2.
1
hour
3.
2
hours
4.
3
hours
Learning Objective:
Recognize
the principles and components
of excavator attachments.
7-25.
Which of the following
structural member of a
excavator attachment?
1.
Boom
2.
Bridle assembly
3.
Dipper stick
4.
Bucket
7-26.
An excavator boom that
is NOT a
hydraulic
is concave
toward the ground allows for which
of the following operations?
1.
Space to pull the bucket
closer to the excavator
2.
Permits deeper digging
3.
Enables the operator to
see past it when raised
4.
All of the above
7-27.
The bottom adjustment hole on the
boom for connecting the boom
cylinder rod eye provides what
maximum operation?
1.
Dump height
2.
Digging depth
3.
Reach
4.
360° rotation work range
7-28.
What term is used to describe the
operation of the bucket digging
toward the excavator?
1.
Excavation
2.
Positive digging operation
3.
Crowding
4.
Reaching
50