9–22.
Boom stops are designed to prevent
9-27.
Before a crane can be put back in
the boom from going-over backwards
in the event what problem occurs?
1.
The boom bounces out of the
cradle during transport
2.
A load line breaks
3.
The operator leaves the boom
hoist lever engaged
4.
The operator swings the crane
too fast
9-23.
What is the function of the master
clutch?
1.
Provides the mechanism to
lift and lower loads
2.
Transmits engine power to
the transmission
3.
Engages the power from the
power source to the hoist
and swing mechanisms
4.
Rotates the house assembly
9-24.
Which of the following types of
crane operations would require
the use of two hoist drums?
1.
Clamshell
2.
Dragline
3.
Pile driving
4.
All of the above
9-25.
What component of a crane plays
an important part when changing
the length of the boom?
1.
The bridle assembly
2.
The main hoist line
3.
The counterweight
4.
The master clutch
9-26.
When lowering the boom to the
ground, the boom point sheaves
should set on a piece of dunnage.
1.
True
2.
False
service, which of the following
instructions states the crane test
director must inspect the crane for
correct installation of all
components?
1.
COMSECOND/COMTHIRDNCBINST
11200.1
2.
COMSECOND/COMTHIRDNCBINST
11200.23
3.
COMSECOND/COMTHIRDNCBINST
4400.3
4.
COMSECOND/COMTHIRDNCBINST
1500.20
9-28.
When telescopic boom sections are
extended unequally, uneven stresses
are placed on the most retracted
section.
1.
True
2.
False
Learning Objective:
Recognize the
components of crane attachments.
9-29.
The number of part lines rigged on
a hook block is NOT a factor when
figuring the capacity of a crane.
1.
True
2.
False
9-30.
In order to operate, which of the
following attachments requires the
use of a tag line, a holding line,
and a closing line?
1.
Concrete bucket
2.
Clamshell
3.
Dragline
4.
Pile hammer
9-31.
Which of the following components
helps prevent the clamshell from
twisting during clamshell
operations?
1.
Fairlead
2.
Closing line
3.
Tag line winder
4.
Bridle assembly
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